Class 3 – Page 5 – Samacheer Kalvi

Samacheer Kalvi 3rd Standard Social Science Guide Term 1 Chapter 1 Family

August 6, 2021

Samacheer Kalvi 3rd Standard Social Science Book Solutions Term 1 Chapter 1 Family

I. Choose the correct answer:

Question 1.
The basic unit of the society is ________.
a) village
b) town
c) family
Answer:
c) family

Question 2.
________ is one of our basic needs.
a) Sofa
b) Shelter
c) Car
Answer:
b) Shelter

Question 3.
Father, mother and children live together is called __________.
a) small family
b) big family
c) joint family
Answer:
a) small family

Question 4.
________ is the best cultural value of Tamilians.
a) Hospitality
b) Celebrating festivals
c) Going to temple
Answer:
a) Hospitality

Question 5.
Running the family by preparing ________ is the best way to improve economy.
a) wealth
b) money
c) budget
Answer:
c) budget

II. Match the following.

1. Character	a. should live in unity
2. Sharing work	b. uncle
3. Maternal relation	c. vegetable vendors
4. Outsiders	d. improve relationships
5. Neighbours	e. respect

Answer:

1. Character	a. respect
2. Sharing work	b. should live in unity
3. Maternal relation	c. uncle
4. Outsiders	d. vegetable vendors
5. Neighbours	e. improve relationships

III. True or False.

Question 1.
A family fulfills all our basic needs.
Answer:
True

Question 2.
Our neighbours are our relatives.
Answer:
False

Question 3.
Our economy improves when expenditure exceeds income.
Answer:
False

Question 4.
We must keep our things in their respective places.
Answer:
True

Question 5.
Simplicity is the best policy for every family
Answer:
True

IV. Answer the following.

Question 1.
Name the types of families.
Answer:

Small family or nuclear family
large family or extended family
Joint family.

Question 2.
What do you mean by joint family?
Answer:
Two or three generations live together. This type of family is called a Joint family.

Question 3.
What are the values that we learn from our family?
Answer:
Affection, Respect, Protection, Sharing.

Question 4.
Who are our neighbours?
Answer:
Many families live near our home. We call them neighbours.

Question 5.
Write a note on ‘Budget’.
Answer:
Income and Expenditure is important for any family. We must spend according to our income. Basic needs should be fulfilled first. We must act according to the budget system.

Project work:

Question 1.
Income and Expenditure are same
Answer:
✗

Question 2.
Income is more than expenditure
Answer:
✓

Question 3.
Income is lesser than expenditure
Answer:
✗

Let us Write (Text Book page No. 145):

Question 1.
List out the names of your Maternal relations and Paternal relations of your family.

Answer:

My Maternal relatives	My Paternal relatives
Grand Mother	Grand Mother
Grand Father	Grand Father
Uncle	Uncle
Aunt	Aunt

Think (Text Book page No. 146):

Question 1.
Have you seen families with two or three generations living together in your area?
Answer:
No, I have never seen such familes having two or three generations living together in my area.

Activity (Text Book page No. 147):

Question 1.
List out the other values that bind the family members together.
Answer:
Tolerance, Forgiveness, Kindness, Helping to others.

Think Zone (Text Book page No. 148):

Question 1.
How do you manage your things? Discuss with your friend.
Answer:

I use my things when ever I need.
I always use them carefully.
I use minimum things for my needs.

Question 2.
How do you call your relations?
Answer:

Mothers mother – Grand Mother
Father’s father – Grand Father
F ler’s sister – Aunt
Mother’s brother – Uncle

Question 3.
How should you behave when the relatives come?
Answer:

I welcome my relatives with love.
I give water to welcome home.
I converse some time with them.
I spend my time with them.

Activity Let us find (Text Book page No. 149):

Answer:

Think Zone (Text Book page No. 151):

Question 1.
Is there any pet animal in your house?
Answer:
Yes, I have a cat as my pet animal.

Question 2.
Before lying any object, have you ever thought of its necessity?
Answer:
Yes, I think about the necessity of the object, before I buy it.

Question 3.
How many members in your family earn for livelihood?
Answer:
My father and mother both of them earn for our livelihood.

Question 4.
Do you save money?
Answer:
Yes, I save little money which get from my parents.

3rd Standard Social Science Guide Family Additional Questions and Answers

I. Choose the correct answer.

Question 1.
People who are related through our mother are called________ relations.
a) Maternal
b) Paternal
c) public
Answer:
a) Maternal

Question 2.
Two or three generations live together. This type of family is called a __________.
a) small family
b) big family
c) joint family
Answer:
c) joint family

Question 3.
___________ fulfill our basic needs like food, dress and shelter.
a) Village
b) Family
c) Town
Answer:
b) Family

Question 4.
__________ crisis occur when expenditure exceeds income.
a) Economic
b) Society
c) Family
Answer:
a) Economic

Question 5.
__________ helps us to feel safe and secure.
a) Village
b) Town
c) Family
Answer:
c) Family

II. Match the following:

1. Small family	a. two or three ganerations
2. Large family	b. protection
3. Joint family	c. milk man
4. Values	d. extended family
5. Outsiders	e. nuclear family

Answer:

1. Small family	a. nuclear family
2. Large family	b. extended family
3. Joint family	c. two or three ganerations
4. Values	d. protection
5. Outsiders	e. milk man

III. True or False.

Question 1.
Basic unit of the society is family.
Answer:
True

Question 2.
Town helps us to feel safe and secure.
Answer:
False

Question 3.
Income and Expenditure is important for any family.
Answer:
True

Question 4.
All the members meet during hospitals.
Answer:
False

IV. Answer the following.

Question 1.
What is family?
Answer:
Father, mother, children, and other close relations live together in a family.

Question 2.
Write the types of relations.
Answer:
The types of relations are

Maternal relations
Paternal relations.

Question 3.
What are paternal relations?
Answer:
People who are related through our father are called paternal relations.

Samacheer Kalvi 3rd Standard Social Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air

August 6, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 3 Chapter 3 Air

I. Fill in the blanks using the given words:
(air, weight, raises, lungs, inhale)

Question 1.
Air has ____________ .
Answer:
weight

Question 2.
Things need ____________ for burning.
Answer:
air

Question 3.
The process by which we breathe in air is known as ____________
Answer:
inhale

Question 4.
The organ that helps us to breathe is ____________.
Answer:
lungs

Question 5.
When we breathe in air, the chest up ____________.
Answer:
raises

II. Write ‘T’ if True and ‘F’ if False:

Question 1.
Air is nowhere.
Answer:
False

Question 2.
Air fills the empty space.
Answer:
True

Question 3.
Clouds move because of the movement of air.
Answer:
True

Question 4.
A very strong wind is called gale.
Answer:
True

Question 5.
We release oxygen during breathing.
Answer:
False

III. Circle the odd one and answer the question:

Question 1.
Balloon, Cycle tube, Foot ball,Cricket ball
Answer:
Cricket ball

Why is it different from the rest?
Answer:
It does not contain air in it.

Question 2.
Kite, Balloon, Stone, Feather
Answer:
Stone

Why ______ differs from the rest?
Answer:
It differs from the rest, because it is heavy.

IV. Answer the following:

Question 1.
What are the properties of air?
Answer:
It has no definite shape and colour. Air has weight and it occupies space. We cannot see air but it can be felt. Air can flow everywhere.

Question 2.
Write the use of windmill.
Answer:
Electricity is generated from wind with the help of the windmills.

Question 3.
What is breathing?
Answer:
Inhalation is the process of taking the air inside and exhalation is the process of releasing the air outside. This cyclical process of inhalation and exhalation is called breathing.

Question 4.
Write the processes involved in breathing.
Answer:
The processes involved in breathing are inhalation and exhalation.

Question 5.
Write the types of wind based on the speed of air.
Answer:
Based on the speed of air, .wind can be classified as are breeze, strome & gale.

Question 6.
Differentiate between land breeze and sea breeze.
Answer:

Land breeze	Sea breeze
1. The breeze that blows from the land towards the sea during night time	The breeze that blows from the sea towards the land during day time
2. The warm air from the sea rises up and the cold air from the land moves towards the sea.	The warm air from the land rises up and the cold air from the sea occupies the space over the land

InText Activity:

Warm-up (Text Book Page No. 92):

Observe the pictures and answer the given question.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter3 Air 1

What is necessary for these activities?
Answer:
Air

Try to answer (Text Book Page No. 94):

a. Write true or false for the following statements.

Question 1.
Air occupies space but has no weight.
Answer:
False

Question 2.
Air is colourless.
Answer:
True

Question 3.
Air has definite shape.
Answer:
False

b. If we fill air in the _________, it will change its shape.
(1) jar
(2) jug
(3) ball
Answer:
(3) ball

c. Which of the following ¡s required for good health?
(1) Dust
(2) Clean air
(3) Smoke
Answer:
(2) Clean air

Let us Try (Text Book Page No. 95):

Question 1.
Make a paper plane with waste paper and fly it in the air.
These activities conclude that air _________ the things.
Answer:
moves and pushes

Question 2.
Air is required for burning.
Light a candle and place it on a table. Now cover the lightning candle with a glass jar. Observe what. happens?
_________ is required for burning things.
Answer:
Air.

Let us Do (Text Book Page No. 96):

Air Jack

Materials required:
Empty plastic milk cover, a piece of thick string and an old pen body or pipe.

Procedure:
Tie an old pen body or a pipe to the mouth of the milk cover with a string. Place 3 or 4 thin note books up on the plastic milk cover and slowly blow air into it with your mouth. As the cover gets inflated the books get raised. How does that work? The pressure that you exert with your mouth is limited. But the large area of the milk cover magnifies this pressure and lifts the books.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 2

The above activity shows that __________.
(1) Air rises up on getting warm
(2) Air is needed for burning
(3) Air has pressure
Answer:
(3) Air has pressure

Think zone (Text Book Page No. 97):

Why the doctor-in our chest raises up and when we breathe-out it lowers down.
Answer:
Doctor will usually check your pulse to counting your pulse rate, it is a simple way to find out how fast your heart ¡s beating.

Let us Do (Text Book Page No. 97):

Tick (✓) the one which breathes and cross (✗) the one that does not breathe.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 3

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 4

Let us Write (Text Book Page No. 97):

Choose and write the correct answer for the following actions.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 5

Answer:

S. No.	Actions	Inhalation / Exhalation
1	Air moves out of the lungs	Exhalation
2	Air goes into the lungs	Inhalation
3	Chest raises up	Inhalation
4	Chest lowers down	Exhalation

Try to Answer (Text Book Page No. 98):

The effect of exercise on breathing:

Mathi and Mozhi practised various exercises like walking, skipping and running. They counted the number of times they breathed in one minute after each exercise and recorded their results in the bar diagram:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 6

Look at the bar diagram.

a. Which activity raised the breathing rate the most?
Answer:
Running

b. Which activity do you think exercises the heart muscle the least?
Answer:
Sitting

c. Write ‘T’ if True and ‘F’ if False.

Question 1.
They breathed more number of times when they were walking.
Answer:
(F)

Question 2.
They breathed less number of times when they were sitting.
Answer:
(T)

Question 3.
They took 50 breaths per minute when they were running.
Answer:
(T)

Question 4.
The more vigorous (active) the exercise, the greater the number of breaths.
Answer:
(T)

Let us connect (Text Book Page No. 100):

a. Breeze	Strong wind
b. Storm	Very strong wind
c. Gale	Gentle wind

Answer:

a. Breeze	Gentle wind
b. Storm	Strong wind
c. Gale	Very strong wind

Let us draw (Text Book Page No. 101):

Draw the movement of air for land breeze and sea breeze.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 7

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 8

Try to Answer (Text Book Page No. 101):

Fill in the blanks.

Question 1.
Gentle air is called __________.
Answer:
breeze.

Question 2.
We get electricity from wind using __________
Answer:
wind mills

Question 3.
The air that flows from the land towards the sea is __________
Answer:
Land breeze

Question 4.
Sea breeze is the air moving from __________ towards __________.
Answer:
Sea, Land

Try to Answer (Text Book Page No. 102):

What will you do during disaster.
(I will/I will not)

a. ______ watch TV when it rains heavily.
Answer:
I will not

b. ______ follow the warnings.
Answer:
I will

c. ______ stand under a tree when heavy wind blows.
Answer:
I will not

3rd Standard Science Guide Air Additional Questions and Answers

I. Choose the correct answer.

Question 1.
Very strong wind is called ___________.
(a) gale
(b) storm
(c) breeze
Answer:
(a) gale

Question 2.
Speed of wind is measured using an instrument called ___________.
(a) Thermometer
(b) Anemometer
(c) Barometer
Answer:
(b) Anemometer

Question 3.
Air is a ___________ resource, we cannot live without it.
(a) artificial
(b) natural
(c) renewable
Answer:
(b) natural

Question 4.
Plants breathe through ___________.
(a) leaves
(b) roots
(c) stem
Answer:
(a) leaves

Question 5.
We take oxygen and release ___________ gas while breathing.
(a) oxygen
(b) carbon dioxide
(c) nitrogen
Answer:
(b) carbon dioxide

II. Fill in the blanks.

Question 1.
A gentle wind is called ___________ (breeze / gale)
Answer:
breeze

Question 2.
Sea breeze takes place during ___________.(day time / night time)
Answer:
day time

Question 3.
___________ uproot trees and destroy the crops. (Breeze / Storm)
Answer:
Storm

Question 4.
___________ is generated from wind with the help of the wind mills. (Heat / Electricity)
Answer:
Electricity

III. True or False.

Question 1.
Air is required for burning.
Answer:
True

Question 2.
Air has no pressure.
Answer:
False

Question 3.
Air is colourless.
Answer:
True

Question 4.
We require polluted air for good health.
Answer:
False

IV. Match the following.

1. Speed of wind	a. Very strong wind
2. Breeze	b. Anemometer
3. Storm	c. Gentle wind
4. Gale	d. Strong wind

Answer:

1. Speed of wind	a. Anemometer
2. Breeze	b. Gentle wind
3. Storm	c. Strong wind
4. Gale	d. Very strong wind

V. Answer the following questions.

Question 1.
How is the wind measured?
Answer:
Speed of the wind is measured using an instrument called “Anemometer”.

Question 2.
How do fish breathe?
Answer:
Fish breathe through gills.

Question 3.
What ¡s inhalation?
Answer:
Inhalation is the process of taking the air inside.

Question 4.
What is exhalation?
Answer:
Exhalation is the process of releasing the air outside.

Question 5.
What happens to our chest when we breathe?
Answer:
When we breathe-in our chest raises up and when we breathe-out it lowers down.

VI. Answer in detail.

Question 1.
Prove with an experiment that air has weight.
Answer:
Take two balloons. Fill air in one balloon and keep the other balloon as it is. Take a stick and tie the balloons on the ends of the stick. The balloon with air come down because air has weight.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 3 Air 9

Conclusion:
This experiment proves that air has weight.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life

August 5, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 3 Chapter 2 Animal Life

I. Choose and write the correct answer.

Question 1.
Mosquito sucks its food. Which of the animals given below such their food?
a) Cockroach
b) Parrot
c) Butterfly
Answer:
(c) Butterfly

Question 2.
Bear sometimes eats pumpkin and sometimes eats fish. So, it is an _________.
a) Carnivore
b) Omnivore
c) Herbivore
Answer:
(b) Omnivore

Question 3.
A bird that has beak which helps it to crack open shells and eat the seed inside is __________.
a) Sparrow
b) Owl
c) Kingfisher
Answer:
(a) Sparrow

Question 4.
Flesh eating animals have well developed ______.
a) Molars
b) Tusks
c) Canines
Answer:
(c) Canines

Question 5.
Elephant is a _______.
a) Herbivore
b) Carnivore
c) Omnivore
Answer:
(a) Herbivore

Question 6.
Choose the carnivore.
a) Deer
b) Lion
c) Giraffe
Answer:
(b) Lion

Question 7.
In a food chain, a ______ can be placed immediately before a snake.
a) Eagle
b) Frog
c) Grass
Answer:
(b) Frog

Question 8.
Select the animal that has similar eating habit like a bear.
a) Camel
b) Deer
c) Hen
Answer:
(c) Hen

Question 9.
Find the odd one based on the habitat.
a) Deer
b) Fish
c) Fox
Answer:
(b) Fish

Question 10.
Which of the following has different eating habits compared to the others?
a) Elephant
b) Cow
c) Dog
Answer:
(c) Dog

II. Fill in the blanks.

Question 1.
A small habitat is ________(forest / leaf).
Answer:
leaf

Question 2.
Butterflies suck ________ (nectar / water) from flowers.
Answer:
nectar

Question 3.
Chisel beak is present in ________ (sparrow / woodpecker)
Answer:
woodpecker

Question 4.
The parrot eats ________ (rats / nuts).
Answer:
nuts.

Question 5.
A food chain always beains with ________. (plants / animals).
Answer:
plants

III. Answer the following questions.

Question 1.
Land and water are common habitats. What is a habitat?
Answer:
The living place of an animal or a plant is called habitat.
Eg: Whales live in sea (water) and foxes live in forest (land).

Question 2.
Give two examples for each.
a. Terrestrial Animal : ________, ________
b. Aquatic Animal : ________, ________
Answer:
a. Cats, Lion
b. Fish, Crab

Question 3.
Why animals move from place to place?
Answer:
Animals move in search of food.

Question 4.
Nectar is the food of bgtterfly. Then, what is the food of earthworm?
Answer:
Soil with organic wastes Differentiate a herbivore from a carnivore.

Question 5.
Differentiate a herbivore from a carnivore.
Answer:

Carnivore

Herbivore

1. Flesh eating animals are called carnivorous or carnivores Eg Hena, Tiger, Lion, Cheetah and seal

1. Animals that eat only plants are called herbivorous animals or herbivores

E.g., Deer, Giraffe, Cow, Goat and Elephant.

2. Have sharp, pointed teeth called canines and used to tear the flesh of animals

2. Have sharp, straight edged, flat front teeth called incisors to bite the grass and leaves.

Question 6.
Is human an omnivore or carnivore?
Answer:
Omnivores.

Question 7.
Give an example of a food chain.
Answer:
grass → deer → tiger.

Question 8.
Choose the correct food chain from the following.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 1

Answer:
c. Leaves → Insect → Bird

In-Text Activity:

Warm-up (Text Book Page No. 71):

Identify and write the names of the animals by using the keywords given.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 2

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 3

Let us Connect (Text Book Page No. 74):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 4

Answer:
Live in Water:
Mussel, Starfish, Whale, Crab, Seahorse, Frog.

Live in Land :
Pig, beer, bog, Frog. Tiger, Monkey, Camel, Horse, Lion, Elephant, Cow.

Let us help (Text Book Page No. 75):

There is a zoo near your town. bue to some reasons, they have to take the animals bock to their habitat. Where will they take each of the following animals.

(Tiger, Crab, Turkey, Giraffe, Cat, Fish, Bear, bonkey, Camel, Crow, Zebra, Duck, Elephant, Tortoise, Pig, Peacock, Lion)

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 5

Answer:

Plains	Forests	Ponds
Turkey	Tiger	Crab
Cat	Giraffe	Fish
Donkey	Bear	Duck
Camel	Zebra	Tortoise
Crow	Elephant
Pig	Peacock
	Lion

Let us Find (Text Book Page No. 75):

A) Circle the odd one based on habitat.

Question a.
a) Lion
b) Elephant
c) Monkey
d) Whale
Answer:
d) Whale

Question b.
a) Shark
b) Dog
c) Jellyfish
d) Star fish
Answer:
b) Dog

B) Write the names of the animal with the help of the clues given.
(Penguin, Whale, Octopus, Duck)

Question 1.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 6

________ has eight arms. It lives in the ocean.
Answer:
Octopus

Question 2.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 7

________ cannot fly, but it swims very well
Answer:
Penguin

Question 3.
________ is the largest animal in the sea.
Answer:
Whale

Question 4.
________ is a common water bird.
Answer:
Duck

Let us connect (Text Book Page No. 77):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 10

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 11

Let us connect (Text Book Page No. 78):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 12

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 13

II. How do animals get their foods?

Write the foods of given animals using the following words.
(Carrot, deer, Milk, Grass, Grains)

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 14

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 15

Let us discuss the following and complete the sentence (Text Book Page No. 79):

(earthworm, butterfly, mosquito, spider, elephant. lion, hen)

Question 1.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 16

Answer:
Lion

Question 2.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 17

Answer:
Mosquito

Question 3.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 17

Answer:
Hen

Question 4.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 19

Answer:
Butterfly

Question 5.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 20

Answer:
Spider

Question 6.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 21

Answer:
Elephant

Question 7.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 22

Answer:
Earthworm

Let us connect (Text Book Page No. 80):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 23

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 24

Let us do (Text Book Page No. 80):

Complete the worksheet using the following hints.
(Tiger, Lizard, beer, Dove, Honeybee, Butterfly, Goat, Fax, Squirrel, Woodpecker)

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 40

Answer:

Grain eating animals: Dove, squirrel
Plant eating animals: Deer, Goat
Flesh-eating animals: Tiger, Fox
Honey eating animals: Honey Bee, Butterfly
Insect-eating animals: Lizard, Woodpecker

Let us think (Text Book Page No. 81):

Question 1.
Elephant is a herbivore. But ¡ts front teeth are not flat. How can we call them?
Answer:
Tusks

Think and Answer (Text Book Page No. 82):

You tell your friend that you are an omnivore. But he tells that he ¡s an herbivore. It is right or wrong? How?
Answer:
Right, but humans are considered to be omnivore because of the capability to digest both plant animal matter. But some of them are said to be herbivores due to their vegetarian food habits.

Let us Connect (Text Book Page No. 83):

Observe the pictures and draw a line to connect them to the appropriate jars.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 25

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 26

Let us find (Text Book Page No. 84):

Circle the foods that the animal will eat. You can choose more than one, if applicable.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 27

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 28

Let us find (Text Book Page No. 84):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 29

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 30

Think and Answer (Text Book Page No. 86):

Have you ever wondered why birds have beaks of different shapes and sizes?
Answer:
The most important function of a birds beak ¡s feeding and it is shaped differently according to their eating habits.

Let us draw (Text Book Page No. 87):

Question 1.
Draw the beaks of birds that perform the following functions.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 31

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 32

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 33

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 34

Let us find (Text Book Page No. 88):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 35

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 36

Try to Answer (Text Book Page No. 89):

Question 1.
Select the food chain that can exist in nature.
A. Grass → Wheat → Grasshopper → Frog → Snake
B. Grass → Rabbit → Fox → Lion
C. Wheat → Grasshopper → Snake → Frog
Answer:
B. Grass → Rabbit → Fox → Lion

Question 2.
From any two food chains using the following.
(Grass, Tiger, Deer, Dolphin, Fish, Insect, Snail, Plant, Kingfisher)
Answer:
Food Chain 1:
Grass → Deer → Tiger

Food Chain 2:
Insect → Fish → Kingfisher

Let us complete (Text Book Page No. 90):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 37

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 2 Animal Life 38

3rd Standard Science Guide Animal Life Additional Questions and Answers

I. Choose the correct answer.

Question 1.
Sharp pointed teeth are called _______.
(a) molars
(b) premolars
(c) canines
Answer:
(c) canines

Question 2.
Animals that have a combination of tearing, biting and grinding teeth are called _______.
(a) Omnivores
(b) Carnivores
(c) Herbivores
Answer:
(a) Omnivores

Question 3.
Animals that hunt other animals are called _______.
(a) producers
(b) predators
(c) decomposers
Answer:
(b) predators

Question 4.
Animals that fly most of the time are called ______ animals.
(a) aerial
(b) arboreal
(c) amphibians
Answer:
(a) aerial

Question 5.
_______ are the habitat of animals like rat, cow, camel.
(a) Plains
(b) Forest
(c) Water
Answer:
(a) Plains

II. Fill in the blanks.

Question 1.
_______ are the habitat of animals like bear and bison. (Plain / Forest)
Answer:
Forest

Question 2.
Animals that live on land are called as ______ animals (terrestrial / aquatic).
Answer:
terrestrial

Question 3.
Pond, lake, and river are habitats, (fresh water / sea water)
Answer:
fresh water

Question 4.
An example for salt water habitat is _______.(sea / river)
Answer:
sea

Question 5.
Animal that lives on trees are called _______. (arboreal/aerial)
Answer:
aerial

Question 6.
A natural home for wild life is _______. (forest / plains)
Answer:
forest

III. True or False.

Question 1.
Shark lives in salt water.
Answer:
True

Question 2.
Lion lives in a nest.
Answer:
False

Question 3.
A hen eats cereals, insects and earthworms.
Answer:
True

Question 4.
Giraffe is a plant eater.
Answer:
True

Question 5.
Animals that are hunted are called prey.
Answer:
True

IV. Match the following:

1. Forest	a. Builds web
2. Desert	b. Suck nectar
3. Spider	c. Suck blood
4. Mosquito	d. Lion
5. Butterfly	e. Camel

Answer:

1. Forest	a. Lion
2. Desert	b. Camel
3. Spider	c. Builds web
4. Mosquito	d. Suck blood
5. Butterfly	e. Suck nectar

V. Answer the following questions.

Question 1.
What are Amphibians?
Answer:
Animals that need both land and water to live are called amphibians.

Question 2.
Give example for arboreal animals.
Answer:
Monkey, Squirrel.

Question 3.
What are aerial animals?
Answer:
Animals that can fly most of time are called aerial animals.

Question 4.
Name the two types of water habitat.
Answer:

Fresh water
Marine water

Question 5.
Name some animals that live on plains.
Answer:
Ants, cats & lion.

Question 6.
Name two salt water habitats.
Answer:
Sea and ocean

Question 7.
How do animals get their food?
Answer:
Animals cannot make their own food, they depend on plants or other plant-eating animals for their food.

Question 8.
Name 2 honey-eating animals.
Answer:
Honey bee & butterfly.

Question 9.
Do all animals eat the same type of food?
Answer:
No, different animals eat different types of food because they have different food habits.

VI. Answer in detail.

Question 1.
Name the mouthparts of the below animals and their functions.
(a) Elephant
(b) Dog
(c) Cat
(d) Butterfly
(e) Mosquito
(f) Lizard
(g) Frogs.
Answer:
(a) Elephant – Uses its trunk for picking up food and sucking water.
(b) Dog – Licks liquids with the help of its tongue.
(c) Cat – Licks liquids with the help of its tongue.
(d) Butterfly – Has a tube like structure to suck nectar from flowers.
(e) Mosquito – Has a needle like structure to suck blood.
(f) Lizards – Have a sticky tongue to catch insects
(g) Frogs – Have a sticky tongue to catch insects.

Question 2.
Name the different shapes of birds beak.
Answer:

Eagle – Sharp, curved beak
Kingfisher – Spear like beak
Parrot – Sharp beak
Wood pecker – Strong chisel beak
Sparrow – Short, conical
Duck – Flat beak.

Question 3.
Write a note on food web.
Answer:
A food web is an interconnection of multiple food chains. Transfer of energy between organisms of different energy occurs through food web.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment

August 5, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 3 Chapter 1 Our Environment

I. Choose the correct answer:

Question 1.
Which of these is an example for biotic factor?
(a) Water
(b) Goat
(c) Air
Answer:
(b) Goat

Question 2.
Our environment is surrounded by ________.
(a) biotic factors
(b) abiotic factors
(c) both biotic and abiotic factors
Answer:
(c) both biotic and abiotic factors

Question 3.
Human beings depend on ________ for their food.
(a) plants
(b) soil
(c) wood
Answer:
(a) plants

Question 4.
_________ are the primary producers.
(a) Non-green plants
(b) Green plants
(c) dry leaves
Answer:
(b) Green plants

Question 5.
Which is an example for decomposer?
(a) Mango tree
(b) Bacteria
(c) Deer
Answer:
(b) Bacteria

Question 6.
Which of these living things would die if there were no green plants on Earth?

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 1

(a) a and c only
(b) b and d only
(c) d and a only
(d) a, b, c and d
Answer:
(d) a, b, c and d

II. Fill in the blanks:

Question 1.
_________ is a consumer. (Cow / Soil)
Answer:
Cow

Question 2.
A young plant is known as _______. (tree / sapling)
Answer:
sapling

Question 3.
Planting of sapling provides ________. (oxygen / land)
Answer:
oxygen

Question 4.
World Environment bay is ________. (June 15th / June 5th)
Answer:
June 5th

Question 5.
________ get food from dead plants and animals. (becomposers / Producers)
Answer:
decomposers

III. Match the following:

1. Stone	a. Consumer
2. Bacteria	b. Abiotic factor
3. Plants	c. Decomposer
4. Buffalo	d. Producers

Answer:

1. Stone	a. Abiotic factor
2. Bacteria	b. Decomposer
3. Plants	c. Producers
4. Buffalo	d. Consumer

IV. Say true or false.

Question 1.
Abiotic factors are important for biotic factors.
Answer:
True

Question 2.
River is an example for biotic factor.
Answer:
False

Question 3.
‘Van Mahotsav’ is organised during the first week of July every year.
Answer:
True

Question 4.
Plants are the consumers.
Answer:
False

Question 5.
Plants provide food and shelter to living things.
Answer:
True

V. Answer the following.

Question 1.
Vijay placed two things ‘p’ and ‘R’ (one living and one non-living) in seperate cages with food and water.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 2

a. Which thing is likely to be a living thing? Give reason for your answer.
Answer:
Only living thing ‘P’ can gain weight after taking food and water. Other thing ‘R’ will not show any weight gain.

b. What will be the weight of living thing in week 6?
Answer:
12 kg

Question 2.
Write two examples for biotic and abiotic factors.
Answer:

Biotic	Abiotic
Lion	Water
Human being	Air

Question 3.
Write any three differences between living and non-living things.
Answer:

Biotic Factors (Living things)	Abiotic Factors (Non Living things)
They can breathe and grow	They cannot breathe and grow
They need food to live	They do not need food to live
They can feel	They cannot feel
They give birth to young ones	They do not give birth to young ones

Question 4.
List the abiotic factors needed for insects.
Answer:
Soil, Small Creatures, Air, Plants.

Question 5.
What are the biotic factors of a balanced ecosystem?
Answer:
The biotic factors in an ecosystem includes producers, consumers, and decomposers.

Question 6.
Why plants are called primary producers?
Answer:
Green plants make their own food by the process of photosynthesis. Hence, they are called primary producers.

Question 7.
Write any four benefits of plants.
Answer:
(i) Provide oxygen for breathing.
(ii) Provide food and shelter to living things.
(iii) Help in bringing rainfall.
(iv) Offer a good environment to live.

In-Text Activity:

Let us try (Text Book Page No. 58):

Question 1.
Write the names of the animals that you see in the previous page picture.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 3

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 4

Question 2.
Classify the following into natural things and man-made things.
(Dam, river, coconut tree, building, jasmine flower, hill, cloud, silver vessel, cell phone, temple, cake, air, sun, ship, water, pencil, book, doll, football, sunflower, crocodile, aeroplane)

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 5

Answer:

Natural things	Man-Made things
River, Jasmine flower, Hill, Cloud, Air, Sun, Water, Sun flower, Crocodile, Coconut tree.	Dam, Building, Silver Vessel, Cell Phone, Temple, Cake, Ship, Pencil, Book, Doll, Foot Ball, Aeroplane

Let us connect (Text Book Page No. 59):

Match the following sources with their products and uses.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 6

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 7

Let us try (Text Book Page No. 61):

Question 1.
Classify the following as Biotic / Abiotic factors.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 8

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 9

Question 2.
Think and Answer (Text Book Page No. 61):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 10

a. A swing goes to and fro. Is it living or non-living? ________
Answer:
non-living.

b. We get wood from trees which are the living things. A chair is made from wood. Is the chair a living thing or a non-living thing?
Answer:
non-living thing.

Try to Answer (Text Book Page No. 62):

Look at the picture and answer the question.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 11

Which of the non-living things can float?
a. Iron rod
b. Stone
c. Air filled ball
d. Coin
Answer:
c. Air filled ball

Let us try (Text Book Page No. 62):

The following statements describe some of the characteristics of living things. Identify and write the characteristic features using the given hints.
(Characteristics Hints: Move, Breathe, feel, Needs food, Grow, Reproduce)

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 12

Answer:

Statements	Characteristics features
Touch-me-not plant closes its leaves when it is touched	Feel
A papaya seed becomes a papaya tree	Grow
A dove flies in the sky	Moves
A cow eats grass	Needs food
A cat qives birth to kittens	Reproduce
Humanbeings and animals breathe in and breathe out air.	Breathe

Let us play (Text Book Page No. 62):

Divide the class into two groups and ask the first group to write any five biotic factors and the second group to write any five abiotic factors seen around the school.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 13

Answer:

Biotic factors	Abiotic factors
Cat	Black Board
Dog	Chalk piece
Man	Tiffen box
Lion	Pencil
Fish	Bag

Write the needs of the following (Text Book Page No. 63):

Question 1.
Birds : _____, _____, _____, ______
Answer:
air, water, sunlight, winds, trees.

Question 2.
Insects : _____, _____, _____, ______
Answer:
Soil, small creatures, plants, air.

Question 3.
Human beings : _____, _____, _____, ______
Answer:
Plants, water, air , animals, sunlight.

Let us discuss (Text Book Page No. 64):

Question 1.
There is a large banyan tree in a park. Monkeys and all birds have made the tree their home. Humans too spend time under the tree. Discuss with your friends, how the tree, monkeys, birds, and humans are interdependent.

Question 2.
Why is the plant most important living thing?
Answer:
Monkeys and birds have made the tree their home. Humans too spend time under the tree.

Question 3.
Discuss in a group and create an interlink of living and non-living factors.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 14

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 15

Let us try (Text Book Page No. 64):

Question 1.
write the abiotic factors needed for the following biotic factors to survive.
(Air, Water, Sunlight, Soil, Land, Wheat, Fruits, Grass, Hen)
a. Animals: __________
b. Plants: _________
c. Human beings: _________
Answer:
a. Animals: Air, water, sunlight, grass
b. Plants: Sunlight, water, air, soil
c. Human beings: Sunlight, water, air, land, wheat, fruits, hen

Question 2.
An animal that,

a. Flies in the air is : ________
Answer:
Butterfly

b. Lives in water is : ________
Answer:
Fish

c. Moves on the ground is : ________
Answer:
Snake

d. Eats only plants is : ________
Answer:
Herbivore

Intext Question:

Imagine an environment where there are only plants, deer, and lions.

Question 1.
What will happen to the deer, if we remove all the lions?
Answer:
If all the Lions are removed from the forest, then the number of secondary consumers will be increased and scarcity of plant (food) occur due to the overpopulation of deers and cause an imbalance in the ecosystem.

Question 2.
What will happen to the plants, if there are no lions to eat the deer?
Answer:
If all the deer are removed from the forest, other host unable to get food. Such as, lions unable to get sufficient food for being alive and as a result, the lion population gradually die due to starvation. This will affect the food chain and leads to an imbalance in ecosystem.

Question 3.
If all the plants are eaten, what will happen to the deer?
Answer:
Deers unable to get sufficient food for being alive, as a result deer population gradually die due to starvation.

Let us try (Text Book Page No. 66):

Classify the following biotic factors.
(Tulsi, Fungi, Mango tree, Rabbit, Eagle, Cat, Dog, Cucumber plant, Human, Grass, Crocodile, Crow, Bacteria)

Question 1.
Producers: _________, _________, _________, ________, _________
Answer:
Mango tree, Tulsi, Cucumber, Plant, Grass.

Question 2.
Consumers: _________, _________, _________, ________, _________
Answer:
Eagle, Human, Crocodile, Crow, Rabbit, Cat, Dog.

Question 3.
Decomposers: _________, _________, _________, ________, _________
Answer:
Fungi, Bacteria.

Let us discuss (Text Book Page No. 66):

Question 1.
Let us discuss and write.
Plants and human beings are living things. Why do human beings depend on plants?
Answer:
Human beings depend on plants for their food, clothing, breathing, medicines, etc.

Let us try (Text Book Page No. 66):

The names of several natural resources are hidden in the box be! find as many possible. Some words are repeated.

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 16

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 17

Let us connect (Text Book Page No. 67):

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 18

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 3 Chapter 1 Our Environment 19

Let us do (Text Book Page No. 67):

A. Write any two uses of trees.
Answer:

Trees provide shade and shelter
Trees clean the air.

E. Write some slogans on 5ave Plants and paste them on the tree in your school campus/roadsides. (E.g., Take care of the Earth and it will take care of you. It’s not yours, nor mine, it’s ours).
Answer:

It is time for greeny and not greedy.
Love your life & plant more trees.

3rd Standard Science Guide Our Environment Additional Questions and Answers

I. Choose the correct answer.

Question 1.
Our ________ consists of both living and non-living things.
(a) body
(b) environment
(c) none of these
Answer:
(b) environment

Question 2.
_______ is the science that deals with the relationship between living things and their environment.
(a) Zoology
(b) Botonay
(c) Ecology
Answer:
(c) Ecology

Question 3.
_______ in an ecosystem includes producers, consumers and decomposers.
(a) Biotic factors
(b) Abiotic factors
(c) Non-biotic factors
Answer:
(a) iotíc factors

Question 4.
Flesh eating animals are called ________.
(a) herbivores
(b) carnivores
(c) omnivores
Answer:
(b) carnivores

Question 5.
Van mahotsav means _________.
(a) festival of India
(b) festival of lights
(c) festival of forests
Answer:
(c) festival of forests

II. Fill in the blanks.

Question 1.
A person who protects the environment is _________. (educationalist / environmentalist)
Answer:
environmentalist

Question 2.
Amoeba is an _________ organism. (multicellular / unicellular)
Answer:
unicellular

Question 3.
Plants _________ move around like animals. (can / cannot)
Answer:
cannot

Question 4.
Plants that do not produce their food and depend on other plants are called _____ plants. (saprophytic/parasitic)
Answer:
parasitic.

Question 5.
_________ is an Example of decomposers. (Fungi / Cat)
Answer:
Fungi

III. Say true or false.

Question 1.
Plants grow and their shoots show movements towards the Sun.
Answer:
True

Question 2.
Non-living things in our environment are called biotic factors.
Answer:
False

Question 3.
The living things in our environment are called biotic factors.
Answer:
True

Question 4.
Both plant and flesh-eating animals are called carnivores.
Answer:
False

Question 5.
Plants provide food and shelter to living things.
Answer:
True

IV. Match the following.

1. Cuscutta	a. Plants and animals eating
2. Herbivores	b. Parasitic plants
3. Omnivores	c. Flesh eating
4. Carnivores	d. Plants eating

Answer:

1. Cuscutta	a. Parasitic plants
2. Herbivores	b. Plants eating
3. Omnivores	c. Plants and animals eating
4. Carnivores	d. Flesh eating

V. Answer the following.

Question 1.
What is meant by the biotic factor?
Answer:
Living organisms in our environment are called biotic factors. E.g., Lion, Plantain, Dove, Human beings etc.

Question 2.
What is meant by abiotic factor?
Answer:
Non-living things in our environment are called abiotic factors. E.g., Air, Soil, Water, Sunlight, Temperature etc.

Question 3.
Write a short note on Amoeba.
Answer:
Amoeba is a unicellular organism. It has the ability to alter its shape. It was discovered in 1975.

Question 4.
What is a decomposer?
Answer:
Organisms that feed on the wastes, dead plants, and animals are called decomposers. They return the nutrients to the soil. E.g., Bacteria, Fungi.

Question 5.
List out the important initiatives to protect our environment?
Answer:
Some important initiatives to protect our environment.

The Chipko Movement – 1970
The Environment Protection Act – 1986
National GreenTribunal – 2010
Appiko Movement – 1983

Question 6.
Name some Man-made things.
Answer:
Temple, house, car, pen, pencil, book, dolls, aeroplane etc, are Man-made things.

Question 7.
What is ecology?
Answer:
Ecology is the science that deals with the relationship between living things and their environment.

VI. Answer in detail.

Question 1.
Explain the biotic factors in an ecosystem.
Answer:
Answer:
Producers:

The living things that can prepare their own food are called producers.
Green plants are the producers. They make their own food by the process of photosynthesis. Hence, they are called ‘primary producers’.

Consumers:

The living things that eat the food prepared by. the producers are called consumers.
Most of the living things depend directly or indirectly on producers for their food.
Consumers can be divided into three types based on their food as herbivores (plant-eating animal), ‘carnivores (flesh-eating animal), omnivores (both plant and flesh-eating animal).

Decomposers:

Organisms that feed on the wastes, dead plants, and animals are called decomposers.
They return the nutrients to the soil.
E.g., Bacteria, Fungi.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants

August 4, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 3 Plants

I. Choose the correct answer.

Question 1.
The function of leaf is to ________.
(a) Give Support
(b) Fix the plant firmly
(c) Produce food
(d) None of the above
Answer:
(c) Produce food

Question 2.
An example for taproot is _______.
(a) Paddy
(b) Grass
(c) Mango
(d) Ragi
Answer:
(c) Mango

Question 3.
________ supports the plant.
(a) Root
(b) Leaf
(c) Flower
(d) Stem
Answer:
(d) Stem

Question 4.
Most plants grow from the ________.
(a) root
(b) leaf
(c) flower
(d) seed
Answer:
(d) seed

Question 5.
Roots are poorly developed in _________.
(a) agaya thamarai
(b) neem
(c) teak
(d) date palm
Answer:
(a) agaya thamarai

Question 6.
If part X will be absent in a plant, new plants will not be produced. X is _________.
(a) stem
(b) root
(c) flower
(d) leaves
Answer:
(c) flower

Question 7.
The plant is adapted to grow in deserts as it has ________.
(a) fleshy stem
(b) needle like roots
(c) leaves changed to spine
(d) both a and c
Answer:
(d) both a and c

Question 8.
An example of many seeded fruit is ________.
(a) pomegranate
(b) mango
(c) apricot
(d) peach
Answer:
(a) pomegranate

Question 9.
Which of the following plant parts take part in absorption of water and exchange of gases respectively?
(a) P and R
(b) R and S
(c) S and Q
(d) T and P
Answer:
(d) T and P

II. Find the odd one.

Question 1.
(a) Carrot
(b) Radish
(c) Tomato
(d) Beetroot
Answer:
(c) Tomato

Question 2.
(a) Cabbage
(b) Greens
(c) Turmeric
(d) Spinach
Answer:
(c) Turmeric

Question 3.
(a) Neem
(b) Aloe vera
(c) Datepalm
(d) Opuntia
Answer:
(a) Neem

Question 4.
(a) Coconut
(b) Mango
(c) Apricot
(d) Orange
Answer:
(d) Orange

Question 5.
(a) Hydrilla
(b) Opuntia
(c) Water hyacinth
(d) Vallisneria
Answer:
(b) Opuntia

III. Short answers.

Question 1.
Name the parts of a plant.
Answer:
The basic parts of a plant are root, stem, leaf, flower, fruit and seed.

Question 2.
Name the types of roots.
Answer:
They are of two main types:

tap root and
fibrous root.

Question 3.
Write any two functions of the leaves.
Answer:

Leaf prepares food for the plant with the help of water, carbondioxide and in the presence of sunlight and chlorophyll.
The loss of water in the form of gas (water vapour) happens through the tiny pores in the leaves.

Question 4.
Write the parts of a flower.
Answer:

Stamen,
Pistil,
Petal,
Sepal

Question 5.
Name the types of plants based on thier habitat
Answer:

Land (Terrestrial) plants
Water (aquatic) plants

Question 6.
Write any two adaptations of desert plants.
Answer:

Leaves are changed to spines to reduce the loss of water.
The stem is green and fleshy. They store water and produce food.

Question 7.
Write the names of some water plants.
Answer:

Water hyacinth (Agaya thamarai),
Pistia.

IV. Answer the following questions.

Question 1.
Write any two functions of each:
(a) Stem _________, _________
Answer:
Supports, Transports

(b) Root _________, _________
Answer:
Fixation, Absorption

Question 2.
Why is leaf called food factory of the plant?
Answer:
Leaf prepares food for the plant with the help of water, carbon dioxide and in the presence of sunlight and chlorophyll. This process is called photo synthesis. Hence, it is called the food factory of the plant.

Question 3.
Differentiate between taproot and fibrous root.
Answer:

S.No	Taproot	Fibrous root
1.	Thick main root that goes deep into the soil.	No main root and the roots do not go deep into the soil.
2.	Side roots are developed from the main root.	Roots are developed from the base of the stem.
3.	Looks like a long tap E.g., Tamarind, Guava.	Looks like a bunch. E.g., Corn, Sugarcane.

Question 4.
Give two examples of :
(a) Fruit having only one seed
(b) Fruit having many seeds
Answer:
(a) Some fruits have only one seed.
E.g., Apricot, Mango, Coconut and Peach.

(b) Some fruits have many seeds.
E.g., Papaya, Watermelon and Orange.

Question 5.
Name two free floating plants.
Answer:

Water hyacinth (Agaya thamarai)
Pistia.

Question 6.
Look at the picture of a water lily.
(a) Which parts of the plant can you see?
(b) Where are the plant’s roots and stem?
Answer:
(a) Flower, Leaf
(b) The plant’s roots and stem are in the bottom of the water bodies.

In-Text Activity:

Warm-up (Text Book Page No. 58):

Unscramble the words and label the parts of the plant.
(ETSM, TORO, ELFA, FURTI, LOFEWR, SDEE)

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 1

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 2

Let us Do (Text Book Page No. 60):

Take two small potted plants. Cut the root of one of the plants and fix ¡t in the pot. Now water the plants for two to three days. You will observe that the plant without roots will wilt and die. In the absence of roots, plants die.

This activity proves that the function of the roots is to absorb ________ and _______ from the soil.
Answer:
Water, Minerals

Let us Write (Text Book Page No. 60):

True or False

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 3

Question 1.
The roots grow into the soil.
Answer:
True

Question 2.
Fibrous root has a main root.
Answer:
False

Question 3.
Root absorbs water from soil.
Answer:
True

Question 4.
Potato stores food in its root.
Answer:
False

Question 5.
Grass has fibrous roots.
Answer:
True

Fill in the blanks.

Question 1.
_____________ grows towards the sunlight.
Answer:
Stem

Question 2.
Leaves originate from the _____________ .
Answer:
surface of the stem

Question 3.
Green part of the plant that makes food is called _____________ .
Answer:
leaf

Question 4.
_____________ gives support to the whole plant.
Answer:
Stem

Question 5.
Water from soil is absorbed by the _____________ of the plant.
Answer:
root

Think and Write

Question 1.
List out the fruits that do not have seeds. _____________ .
Answer:
Pineapple, Banana

Question 2.
Write down the names of the fruit trees that you have never seen0 but have tasted their fruits. ___________________ .
Answer:
Strawnerry tree, Plum tree, Pear tree

Let us Do

Connect the leaf with its fruit.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 4
Answer:

Let us Connect

Match the plants with their living places.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 6
Answer:

Let us Try

A. Select the ‘INCORRECT’ statement from the following.

1. Desert plants grow in hot, dry and sandy places.
2. Plants in coastal areas tolerant to saline water.
3. Mountain plants have needle like leaves.
4. Teak is an example of desert plant.
Answer:
4. Teak is an example of desert plant.

B. Tick (✓) the odd one.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 8
Answer:

C. Circle the places which are land habitats.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 10
Answer:

Let us Try

A. Mark “L” for land plants and W’ for water plants.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 12
Answer:

B. Colour the water hyacinth plant.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 3 Plants 14
Answer:
Activity to be done by the students

C. Write true or false.

Question 1.
Fixed rooted plants are present in water bodies.
Answer:
True

Question 2.
Leaves of lotus are submerged in the water.
Answer:
False

Question 3.
Lotus plants are found in many ponds.
Answer:
True

Question 4.
Water hyacinth freely float with the help of spongy body filled with air.
Answer:
True

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 Water

August 4, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 2 Water

I. Choose the correct answer.

Question 1.
Which is the main source of water? :
(a) Lake
(b) Sea
(c) Rain
Answer:
(c) Rain

Question 2.
_______ of the water in the entire Earth is freshwater.
(a) 3%
(b) 0.3%
(c) 30%
Answer:
(a) 3%

Question 3.
By ________ water, we can kill the germs.
(a) boiling
(b) cooling
(c) filtering
Answer:
(a) boiling

Question 4.
Which of these is not true?
(a) Plants and animals need water too
(b) We should always wastewater
(c) We should use water carefully
(d) Water is precious
Answer:
(b) We should always wastewater

Question 5.
Where does the rainwater go after falling on the ground?
1. Seeps into the ground
2. Plants absorb the water
3. Mingles with sea and ocean
4. Mixes with lake and pond
(a) 1 and 2
(b) 1, 3 and 4
(c) 1, 2, 3 and 4
Answer:
(c) 1, 2, 3 and 4

II. Fill in the blanks.

Question 1.
Drinking water is known as _________. (pot water / potable water)
Answer:
potable water

Question 2.
Water that collects in the low lying areas is called ________. (sea / lake)
Answer:
lake

Question 3.
It is our ________ to keep the public water resources clean. (responsibility / work)
Answer:
responsibility

Question 4.
The largest source of water on the earth is __________. (river / sea)
Answer:
sea

III. Circle the odd one.

Question 1.
a) Lake
b) Hill
c) Pond
d) Sea
Answer:
b) Hill

Question 2.
a) Lily
b) Lotus
c) Rose
d) Water Hyacinth
Answer:
c) Rose

Question 3.
a) Fish
b) Horse
c) Tiger
d) Cow
Answer:
a) Fish

Question 4.
a) Bathing
b) Combing
c) Swimming
d) Washing
Answer:
b) Combing

IV. Write true or false.

Question 1.
Living things do not need water.
Answer:
False

Question 2.
Saving water is our duty.
Answer:
True

Question 3.
Always close the water tap while brushing teeth.
Answer:
True

Question 4.
A tank is a large area to store water compared to reservoirs.
Answer:
False

V. Answer in one or two sentences:

Question 1.
Write any three different sources of water.
Answer:

Rain
Well
River

Question 2.
Write the symptoms of dengue.
Answer:

Severe headache
Rashes on the arms and the legs
Extreme tiredness
Sudden onset of fever that lasts 3 – 7 days

Question 3.
Write any two diseases that ¡s spread by mosquitoes.
Answer:

Malaria
Dengue Fever

VI. Answer the following.

Question 1.
Why is water known as primary source of life?
Answer:

All living things like small organisms, plants, and animals need water to survive.
People use water for various purposes. So, water is known as a primary source of life.

Question 2.
Suggest some ways to save water at home.
Answer:
Some methods to prevent wastage of water.

Never allow water to overflow from buckets.
Wash fruits and vegetables in a bowl of water and not under running tap water.
Always close the taps while brushing the teeth.
Use left over water in your water bottle to water a potted plant.
Turn off the tap after each use.
Use a sprinkler to water the garden.

Question 3.
List out the ways to conserve water bodies.
Answer:
Methods to Conserve Water Bodies

Deepening of ponds and lakes
Plant trees at the bank of the lake and pond
Reduce water pollution
Avoid digging too many wells in a region.

VII. Think and answer.

Question 1.
How will you avoid wastage of water in your school?
Answer:

We have to turn off the tap as soon as we wash our hands.
Leakages from the taps have to be repaired immediately.
Avoid flushing the toilet unnecessarily.
Use a refillable water bottle.
Pour leftover water onto the garden.
Wash the tiffin boxes in a bowl of water.
Raise awareness of the importance of water by creating colorful posters on water saving.

Question 2.
Write some slogans to save water.
Answer:

Save water and it will save you.
Life starts with water.
Water is more precious than Gold.
Put a Stop to the Water Drop.
Life is impossible without water.
Save water secure the future.
Conserve water, every drop counts!
Saving water can save the world.
Imagine one day without water.
Do your share to care water.

In-Text Activity:

Let us Write (Text Book Page No. 49):

Observe the picture and fill in the blanks.

Question 1.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 1

We need water to _______ our face.
Answer:
wash

Question 2.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 2

We need water to ______ our teeth.
Answer:
brush

Question 3.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 3

We need water to ______ our food.
Answer:
cook

Question 4.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 4

We need water to ________ our vessels.
Answer:
wash

Question 5.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 5

We need water to _______.
Answer:
drink

Let us Do (Text Book Page No. 49):

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 6

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 7

B. Name any four activities which you can do without water.

Answer:

reading
singing
dancing
walking

Let us Discuss (Text Book Page No. 50):

We find animals in the picture near a water source. Why they are gathered here?

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 9

Answer:
They are gathered near the water source to drink water.

Write few lines about the picture.
Answer:
There are elephants, zebra, deer, squirrel, porcupine, pig in this picture. When they are thirsty, they come to a stream to drink water. Wild animals need water. Hence, they come to water bodies in the forests, Just like us, animals too drink water when they are thirsty.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 10

Answer:
Wild animals are entering into human habitat because they are losing their natural habitat. People have occupied the forest lands by cutting trees.

Animals get disturbed due to deforestation and urbanization around the forest area. So, the wild animals are coming out of their natural habitat. Usually they come out to the residential areas in search of food and water in summer.

Let us write (Text Book Page No. 51):

Rearrange the jumbled letters to find out the different sources of water.
E.g. Rain (anir)

Question 1.
_______ ( a l k e )
Answer:
Lake

Question 2.
_______ (o p d n )
Answer:
Pond

Question 3.
_______ (m e r a t s)
Answer:
Stream

Question 4.
_______ (e l l w)
Answer:
Well

Question 5.
_______ ( e a s )
Answer:
Sea

Question 6.
_______ ( o n a e c )
Answer:
Ocean

Let us Discuss (Text Book Page No. 51):

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 11

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 12

1. Water from Hand Water Pump:
We have to boil the water and use for drinking.

2. Boiled water:
Good for drinking.

3. Sewage water is disposed of directly into the river:
In this way, the river water is polluted.

4. Pure water kept in jugs:
Good for drinking.

5. Water for irrigation purpose:
If we want to drink it, it should be boiled.

6. Water at riverside:
It is polluted and contaminated by plastic and other waste materials.

7. Well water:
Though it is good, it is advised to boil it and use for drinking purposes.

8. Water from the waterfall :
It is not good for drinking. Any outdoor water source, except rain/snow, is likely to be contaminated with parasites.

Try to Answer (Text Book Page No. 51):

I freeze when I am cold and
I fall softly as snow,
I melt in the sun and down the mountain I flow.
Who am I? _________
Answer:
Water

Try to Answer (Text Book Page No. 53):

Question 1.
Write some activities through which we can save water.
Answer:

Check taps and pipes for leaks.
Turn off the water while brushing your teeth.
Clean the vegetables in a bowl or sink full of clean water instead of cleaning directly under the tap.
Use a broom to clean verandah, and steps instead of cleaning with a water hose.
Rainwater harvesting is a good way to save water.

Let us Do (Text Book Page No. 53):

Answer the following questions by putting a tick (✓) If your answer is different from all of the given Pictures, write its name in the empty box.

Question 1.
Which one do you use to drink water?

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 13

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 14

Question 2.
Which of these is used to store drinking water at your home?

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 15

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 16

Question 3.
Where do you get your drinking water from?

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 17

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 18

Discuss with your friends and write. What will happen, if you drink unclean water? (Text Book Page No. 56):
Answer:
If we drink uncleaned, polluted, contaminated water, we will suffer due to several kinds of waterborne diseases, such as-

Cholera
Diarrhea
Typhoid
Hepatitis A
Jaundice

Microorganisms such as virus, bacteria, etc. are present in impure water.
These diseases can be life-taking as they are harmful to our immune system also.

Let us Do (Text Book Page No. 53):

A. What are the activities to save water? If true put (✓). if false put (✗).

Question 1.
We should wash our vehicles everyday.
Answer:
✗

Question 2.
Planting more trees leads to rain fall.
Answer:
✓

Question 3.
We can bathe in shower to save water.
Answer:
✗

Question 4.
It is necessary to collect rain water.
Answer:
✓

B. Look at the pictures and answer the following.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 2 water 19

If we fill them with water

Question 1.
Which will contain less water?
Answer:
B

Question 2.
Which will contain more water?
Answer:
A

Question 3.
How could you tell?
Answer:
I could tell after seeing the size of the container.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food

August 4, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 1 Food

I. Choose and write the correct answer:

Question 1.
Bread, wheat and potato are rich in __________.
(a) fats
(b) carbohydrate
(c) protein
(d) roughage
Answer:
(b) carbohydrate

Question 2.
A balanced diet contains _________.
(a) Carbohydrates and vitamins
(b) Proteins, fats and minerals
(c) Fibre and water
(d) All the above
Answer:
(d) All the above

Question 3.
The Vitamin present in carrot is _________
(a) Vitamin-K
(b) Vitamin-A
(c) Vitamin-D
(d) Vitamin-E
Answer:
(b) Vitamin-A

Question 4.
Which of these things are BAD for you?
(a) Eating green vegetables
(b) Washing vegetables before cutting them
(c) Eating lot of fat food items
(d) Eating lot of pulses
Answer:
(c) Eating lot of fat food items

Question 5.
The given picture shows that Raman is most likely eating his a) Breakfast b) Lunch c) Dinner
(a) Breakfast
(b) Lunch
(c) Dinner
Answer:
(b) Lunch

II. Fill in the blanks.

Question 1.
Food rich in ________ are called body-building food.
Answer:
Proteins

Question 2.
________ helps in proper functioning of our body.
Answer:
Vitamins

Question 3.
A ________ is necessary for the proper growth and development of our body.
Answer:
Balanced diet

Question 4.
Sprouted seeds contain more _______.
Answer:
Proteins

Question 5.
________ is the second meal of a day.
Answer:
Lunch

III. Match the following:

1. Carbohydrates and fats	a. Supports body growth
2. Vitamins	b. Regulates body functions
3. Proteins	c. Energy-giving food
4. Minerals	d. Fights diseases

Answer:

1. Carbohydrates and fats	a. Energy-giving food
2. Vitamins	b. Fights diseases
3. Proteins	c. Supports body growth
4. Minerals	d. Regulates body functions

IV. Answer the following questions.

Question 1.
How many nutrients are there? What are they?
Answer:
There are five main nutrients that our body requires. They are carbohydrates, proteins, fats, vitamins and minerals.

Question 2.
Siva is 6 years old. He needs to have good amount of proteins. Give reason.
Answer:
Growing kids need protein to help them build, maintain and replace the tissues in our body. Protein foods also help to form new blood cells and body tissues, and they help the nervous system function properly. So protein are known as body-building foods.

Question 3.
What is a balanced diet?
Answer:
A balanced diet contains all nutrients in the right amounts. It also includes fibre and water. It helps in the growth and development of our body.

Question 4.
What are the meals in a day?
Answer:
A meal is what we eat during a particular time of the day. Breakfast, Lunch and Dinner are the three main meals we eat every day.

Question 5.
What are some traditional food items?
Answer:
Traditional Foods are Ragi, Thinai, Samai, Kuthiraivaali, Varagu and Kambu.

Question 6.
Write any three advantages of a Home Garden.
Answer:

It is the easiest method.
Waste water can be reused.
We get vegetables which are fresh and high in nutritive value.

In-Text Activity:

Warm-up (Text Book Page No. 37):

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 1

a. The food items which should be avoided are indicated by ________ colour.
Answer:
Red

b. The food items which are healthy are indicated by ________ colour.
Answer:
Green

c. The food items which can be eaten in small quantities are indicated by ________ colour.
Answer:
Yellow

Let us Write (Text Book Page No. 39):

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 2

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 3

Let us Write (Text Book Page No. 40):

A. What are the nutrients present in the following food items?

Question 1.
Rice contains _______.
Answer:
Carbohydrates

Question 2.
Coconut oil contains _______.
Answer:
Fats

Question 3.
Egg contains _______.
Answer:
Protein

Question 4.
Fig contains _______.
Answer:
Minerals

Question 5.
Carrot contains _______.
Answer:
Vitamins

B. Fill in the table given below:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 4

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 5

Let us Find (Text Book Page No. 41):

Unscramble the following worlds and search them in the ven grid (One is done for you).

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 6

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 7

Let us Do (Text Book Page No. 41):

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 8

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 9

To check whether it is a balanced diet, split your meal according to the nutrients.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 10

Answer:

Proteins	Carbohydrates	Vitamins and Minerals	Fats
Sprouted seeds, Egg, Milk	Rice, Potato	Carrot, Orange, Banana, Apple	Butter, Ghee, Meat

Think & Answer:

Question 1.
Why do you eat every day? What happens if you don’t eat sometimes?
Answer:

Every day we feel hungry, and so we eat something.
If we don’t eat sometimes, we will be tired.

Question 2.
Why do we need food?
Answer:

Food gives us the energy to work and play.
Food builds our body.
Food keeps us healthy. So, we need food.

Question 3.
What do you usually eat for breakfast?
Answer:
I usually eat any one of the items of idly, dosa, bread omelet, idiyappam, poori, aappam, and Pongal.

Question 4.
Which of the food items that are brought by your friends for lunch?
Answer:
My friends bring curd rice, lemon rice, tomato rice, tamarind rice, rice along with sambar, biriyani, fruit salad, greens, vegetable salad, cereals, etc. for lunch.

Question 5.
At what time you go to bed every day? At what time you have your dinner?
Answer:

I go to bed at 9.00 p.m.every day.
I have my dinner at 8.00 p.m.

Try to Answer (Text Book Page No. 43):

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 11

Question 1.
Which activities are healthy?
Answer:
2, 4, 5

Question 2.
Which activities are not so healthy?
Answer:
1, 3

Try to answer (Text Book Page No. 44):

Some of the famous food items of Tamil Nadu are given below. Write the food items of the particular place.
(halwa, murukku, jackfruit, spices, kadalai mittai, mango, tea)

Question 1.
Manapparai is famous for ________
Answer:
Murukku

Question 2.
The nilgiris is famous for ________
Answer:
Tea

Question 3.
Panruti is famous for ________
Answer:
Jackfruit

Question 4.
Kollimalai is famous for ________
Answer:
Spices

Question 5.
Tirunelveli is famous for ________
Answer:
Halwa

Question 6.
Kovilpatti is famous for ________
Answer:
Kadalai Mittai

Question 7.
Salem is famous for ________
Answer:
Mango

Let us Discuss (Text Book Page No. 45):

Observe the pictures. Who needs more nutritious food? Why?

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 12

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 13

Answer:
Manual laborers are some of the hardest working people out there and it’s very important that they keep their energy high for the day, not only to be able to complete the work, but also to keep their brains alert to avoid mistakes or accidents. So they need more nutritious food.

Try to Answer (Text Book Page No. 45):

Do your parents prepare the same food items for all festivals? If not, write the name of special food items prepared at different festivals.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 14

Answer:

S. No	Name of the festivals	Food items prepared
1	Deepavali	Murukku, Athirasam
2	Pongal	Jaggery Pongal
3	Ramzan	Biryani
4	Christmas	Cake
5	Vinayaka Chaturthi	Kozhukattai

Let us Do (Text Book Page No. 46):

A. Colour the circle in GREEN for traditional food and ‘RED’ for modern food.

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 15

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 2 Chapter 1 Food 16

B. Using watercan / coconut shells, make a mini garden in your classrooms
Answer:
Activity to be done by students.

3rd Standard Science Guide Food Additional Questions and Answers

I. Choose and write the correct answer:

Question 1.
_________ is included ¡n our ancestor’s food.
a) Pizza
b) Chips
c) Thinal
d) Burger
Answer:
c) Thinal

Question 2.
The number of main nutrients required by our body is ________
a) three
b) four
c) five
d) six
Answer:
c) five

Question 3.
_________ act as the body’s energy reservoir.
a) Proteins
b) Fats
c) Minerals
d) vitamins
Answer:
b) Fats

Question 4.
_________ is a complete balanced diet.
a) Milk
b) Carrot
c) Rice
d) Orange
Answer:
a) Milk

Question 5.
The amount of food a person needs depends on his _______.
a) wish
b) height
c) weight
d) age
Answer:
d) age

II. Fill in the blanks.

Question 1.
World Food day is observed on _______.
Arts:
October – 16.

Question 2.
Cabbage contains Vitamin- ________.
Answer:
K.

Question 3.
In _______ areas, people eat a lot of seafood.
Answer:
coastal

Question 4.
We should spend _______ for washing our hands before eating.
Answer:
20 seconds.

III. Match the following.

1. Kollimalai	a. Halwa
2. The Nilgiris	b. Murukku
3. Manapparai	C. Spices
4. Tirunelveli	d. Tea

Answer:

1. Kollimalai	a. Spices
2. The Nilgiris	b. Tea
3. Manapparai	C. Murukku
4. Tirunelveli	d. Halwa

IV. Write True or False.

Question 1.
We should not spill the food while eating.
Answer:
True

Question 2.
Burgers, pizzas, and chocolates are good for health.
Answer:
False

Question 3.
Roughage, also known as fiber, is an indigestible food.
Answer:
True

Question 4.
Salem is famous for Jackfruit.
Answer:
False

Question 5.
Athletes may need less amount of energy during training.
Answer:
False

V. Answer the following questions.

Question 1.
What is the significance of ‘Ragi’?
Answer:
Of all the cereals, ragi is the best bodybuilder and the disease fighter.

Question 2.
What are the food items that can be eaten by Children?
Answer:
Milk, honey, fruits, vegetables, whole grains, egg, sprouted seeds, and fish.

Question 3.
Write the names of the food items that can be eaten by Young Adults?
Answer:
All vegetables, fruits, seafood, greens, milk, and milk products.

Question 4.
Write the names of the food items that can be eaten by Old adults?
Answer:
Fibrous food, low-fat dairy products, food with less salt, ragi, thinai, and pearl millet (kambu).

Question 5.
Write the different varieties of’Ragi’food.
Answer:
Ragi ball, Ragi dosa, Ragi adai, Ragi vermicelli and Ragi biscuits.

Question 6.
What is meant by ‘Home Garden’?
Answer:
Cultivation of crops in a small available place in households is known as a Home garden or Kitchen garden or Nutrition garden.

Question 7.
Differentiate South Indian Food and North Indian Food.
Answer:
South Indian Food:

South Indians depend on rice, dhal, coconut, jaggery for their food.
They make food like Idly, Sambar, Kozhukkattai and Payasam.

North Indian Food:

North Indians depend on wheat, onions, milk and curd.
They make foods like Chappathi, Paratha and Lassi.

Question 8.
Write a note on ‘Fats’.
Answer:

Fats provide energy for us.
They act as the body’s energy reservoir.
Fats also help to keep the body warm during very cold weather.
Too much fat in the body may lead to obesity or overweight.
Cheese, butter, ghee, meat, oil, and nuts are some food items that contain fat.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life

August 3, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 4 Science in Everyday Life

I. Say whether the following statements are true or False:

Question 1.
When we boil water, bacteria are destroyed.
Answer:
True

Question 2.
Idli is cooked by the process called steaming.
Answer:
True

Question 3.
Thermometer is used to measure pressure.
Answer:
False

Question 4.
Refrigerator helps to keep things cold.
Answer:
True

Question 5.
Garlic relieves hiccups and nausea.
Answer:
False

Question 6.
Boiling point of water is 100°C.
Answer:
True

II. Circle the name of the things from which idli is made:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 1

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 2

III. Match the home appliances and their functions:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 3

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 4

IV. Which of these are safe to do at home? Put (✓) or cross (✗) in the box.

Question 1.
Touching electrical appliances
Answer:
✗

Question 2.
Playing with sharp objects
Answer:
✗

Question 3.
Playing in kitchen
Answer:
✗

Question 4.
Keep safe distance from the gas stove and cylinder
Answer:
✓

V. Answer in a word or sentence:

Question 1.
How do you store fruits and vegetables for a longer period?
Answer:
We store fruits and vegetables for a longer time by preserving them in a refrigerator.

Question 2.
Name the instrument used to measure temperature.
Answer:
Thermometer is used to measure temperature.

Question 3.
How is idli prepared?
Answer:
Idli is a natural fermentation process. It is prepared by steaming of fermented better prepared from soaked rice and black gram dal.

Question 4.
What is the use of black pepper?
Answer:
Black pepper is a great remedy for cold and cough.

Question 5.
Which kitchen medicine is called the poor man’s antibiotic?
Answer:
Garlic is called the poor man’s antibiotic.

VI. Answer the following:

Question 1.
Write the uses of boiled water.
Answer:
Uses of boiled water:

Destroys germs.
Healthier digestion.
Prevents us from the infection of water borne diseases.

Question 2.
Write the advantages of pressure cooker.
Answer:
Advantages of pressure cooker:

It cooks food much faster,
It saves energy.
It retains more nutrients,
Preserves the appearance of food.

Let us Think (Text Book Page No. 126):

Question 1.
The doctor advices patients to have idli or idiyappam. Can you guess why?
Answer:

Idli or idiyappam is cooked by steaming.
Steamed food is easily digested.

Tick (✓) the item which you see in your kitchen (Text Book Page No. 126):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 5

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 6

Tick (✓) the food item which are made by steaming (Text Book Page No. 126):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 7

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 8

Arrange the pictures in correct order (Text Book Page No. 127):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 9

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 10

Let us Discuss (Text Book Page No. 128):

Question 1.
Which one takes less time to cook pulses?
a. pressure cooker
b. mud pot
Answer:
a. Pressure cooker

Question 2.
List out the food items prepared by pressure cooker Discuss with your friends.
Answer:
Pulses, Rice, Idli, Briyani.

Match Column A and Column B (Text Book Page No. 129):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 11

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 20

Answer:

a. (4)
b. (5)
c. (1)
d. (3)
e. (2)

Count and colour the objects (Text Book Page No. 130):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 21

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 13

What are your favourite food items? Do you know the ingredients of them? Do they have any medicinal If so, fill in the table. (Text Book Page No. 131):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 14

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 15

Real and Shadow (Text Book Page No. 132):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 16

For what?
To learn how the shadows are formed.

How?

Make the classroom dark.
Light a candle.
Place a toy near the candle. What do you see?
Move the toy away from the candle. What do you see? Move the toy closer to the candle. What do you look at?
Experiment and see what happens to the shadow if the light source is dim?

Complete the sentence:

Question 1.
Moving the toy closer to the candle made its shadow ________.
Answer:
Short

Question 2.
While moving the object away made its shadow ______.
Answer:
Long

Question 3.
The big candle is bright and gives ________ shadow.
Answer:
dark, clear

Question 4.
The small is dim and gives ________ shadow.
Answer:
dim

Lava in a cup (Text Book Page No. 132):

What to do?

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 17

What happens when you (Text Book Page No. 133):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 18

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 4 Science in Everyday Life 19

First of all, the oil floats on the top of the water because it is lighter than the water. Since the salt is heavier than oil, it sinks down into the water and takes some oil with it, but when the salt dissolves, the oil goes up again. Is it not interesting?
Answer:
Yes, It is interesting.

3rd Standard Science Guide Science in Everyday Life Additional Questions and Answers

I. Choose the correct answer:

Question 1.
_________ is a common and usual breakfast of Tamil Nadu.
a) Idli
b) Poori
c) Pongal
Answer:
(a) Idli

Question 2.
_______ helps to reduce chest congestion.
a) Turmeric
b) Cloves
c) Coriander leaves
Answer:
(c) Coriander leaves

Question 3.
The best remedy for cold and caught is ________
a) cloves
b) ginger
c) black pepper
Answer:
(c) black pepper

Question 4.
Thermometer was invented in the year _________.
a) 1640
b) 1703
c) 1714
Answer:
(c) 1714

II. Fill in the blanks:

Question 1.
Idli is cooked by the method called
Answer:
steaming

Question 2.
_________ is a popular home appliance for preserving food.
Answer:
Fridge

Question 3.
_________ is invented by Thermometer.
Answer:
Daniel Fahrenheit

Question 4.
Boiling point of water is _______.
Answer:
100°C

III. Write True or False:

Question 1.
Science is the study of the natural world around us.
Answer:
True

Question 2.
Idiyappam is prepared from rice.
Answer:
True

Question 3.
Idli batter is fermented for 18 hours before use.
Answer:
False

Question 4.
Turmeric is a common anti-infectant.
Answer:
True

IV. Answer in a word or two:

Question 1.
How Science is involved in daily life?
Answer:

Even in our sleep our body is working continuously.
When we eat food, our digestive system is at work.

Question 2.
What is boiling?
Answer:
Heating a liquid until it becomes gas is called boiling.

Question 3.
Mention some safety measures in kitchen.
Answer:

Never play with kitchen utensils.
Use a cloth to hold hot pans.
Inform an adult in case you smell cooking gas leakage.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force

August 3, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 3 Force

I. Fill in the blanks with suitable words:
(Push, force, pull, speed, gravitational force, direction, Muscular)

Question 1.
A __________ is needed to make a stationary object move.
Answer:
Force

Question 2.
The force applied with the help of muscle is called _________ force.
Answer:
muscular

Question 3.
__________ and __________ are known as forces.
Answer:
Push and pull

Question 4.
The reason for the fruits to fall from the tree is ________.
Answer:
gravitational force

Question 5.
Force changes the _________ and ________.
Answer:
speed and direction

II. Match the words with their pictures:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 1

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 2

III. Answer the following questions:

Question 1.
How do you open the door?
Answer:
I open the door by pushing or pulling.

Question 2.
Name the types of force.
Answer:
i) There are two types of forces.

Contact force
Non-contact force.

ii) Contact force is classified into three

Muscular force
Mechanical force
Frictional force

iii) Non-Contact force is classified into two.

Gravitational force
Magnetic force.

Question 3.
Which force is involved in collecting water from well?
Answer:
Muscular force is involved in collecting water from well.

Question 4.
What is push?
Answer:
When a force is applied in the direction of an object, it is called push.

Question 5.
What kind of force is used to make clay pot?
Answer:
Muscular force is used to make clay pot.

IV. Sujatha places a magnet near some objects. What are the objects that will be attracted from the list given below?
(note, pin, coin, rubber, shirt, comb, steel tumbler, nail)
Answer:
pin, coin, steel tumbler, nail.

V. Think and answer:
Raja throws a ball, a stone, a paper, and a leaf up in the air? What kind of force is involved here? What will happen to them?
Answer:
i) Gravitational force is involved here.
ii) So the ball, the stone, the paper, and the leaf will fall down. The earth pulls all the objects towards itself.

Intext Activity:

Let us look at the pictures below to understand movement and action better (Text Book Page No. 114):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 3

In the above pictures.

Question 1.
What moves? _______, ________
Answer:
The ball, The cycle.

Question 2.
What is the action? _______, ________
Answer:
Hitting the ball, Riding the bicycle.

Put a tick (✓) mark for the pictures of motion (Text Book Page No. 116):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 4

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 5

Classify the following – Push or Pull (Text Book Page No. 116):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 6

Answer:

S.No	Activities	Push / Pull
1	Riding the bicycle	Push
2	Moving the table towards you	Pull
3	Dragging the chair	Pull
4	Moving a car to start	Push
5	Opening the window	Push
6	Stretching the rubber band	Pull
7	Removing the shoe laces	Pull

Match the following (Text Book Page No. 118):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 7

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 8

Observe the picture and write the kind of force involved here (Text Book Page No. 120):

Question 1.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 9

Answer:
Muscular force

Question 2.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 10

Answer:
Mechanical force

Question 3.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 11

Answer:
Gravitational force

Question 4.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 12

Answer:
Magnetic force

Tick (✓) the muscular force (Text Book Page No. 120):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 13

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 14

Think (Text Book Page No. 121):

Question 1.
Why do we sprinkle the powder on the carrom board before playing carrom?
Answer:
We sprinkle the powder on the carrom board to make the surface of the board smooth. This reduces the friction between the surface of the carrom board, the striker, and the coins. As a result, the coins and the striker can move easily on the carrom board.

Classify (Text Book Page No. 121):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 3 Force 15

Answer:

List out the push activities	List out the pull activity	List the frictions here
Swing	Pulling wood	Sliding
Playing foot ball	Pulling trolley	Playing in sand
Kids scooter, cycling	Kiting	See saw

3rd Standard Science Guide Force Additional Questions and Answers

I. Choose the correct answer:

Question 1.
________ is the motion which gives the required result.
(a) Action
(b) Direction
(c) Shape
Answer:
(a) Action

Question 2.
________ involves an interaction between two or more objects.
(a) Matter
(b) Force
(c) Action
Answer:
(b) Force

Question 3.
When a force is applied without touching an object, it is called force.
(a) contact
(b) mechanical
(c) non-contact
Answer:
(c) non-contact

II. Fill in the blanks:

Question 1.
Change in position of an object is called _________.
Ahs :
movement

Question 2.
_________ is required in pulling than in pushing.
Answer:
Less force

Question 3.
The force applied by using the parts of our body is called _________ force.
Answer:
muscular

Question 4.
_________ is a force actions between two surfaces in contact.
Answer:
Friction

III. Write True or False:

Question 1.
Force can lift or drop an object.
Answer:
True

Question 2.
The force applied by a machine is called magnetic force.
Answer:
False

Question 3.
The force between two stones created a spark is called frictional force.
Answer:
True

Question 4.
Muscular force is a non-contact force.
Answer:
False

IV. Answer in a word or two:

Question 1.
Define Motion.
Answer:
When an object or a thing moves from one place to another, it is said to be in motion.

Question 2.
What is force?
Answer:
Force is a push or a pull on an object which makes it move, changes its shape, or stops it from moving.

Question 3.
What is pull?
Answer:
When a force is applied in the direction opposite to the direction of an object, it is called pull.

Samacheer Kalvi 3rd Standard Science Guide

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter

August 3, 2021

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 2 States of Matter

I. Indicate whether the following statements are true or False:

Question 1.
Solids have a definite volume.
Answer:
True

Question 2.
Liquids can not flow.
Answer:
False

Question 3.
We can melt any substance by cooling it.
Answer:
False

Question 4.
Liquids can take the shape of a container.
Answer:
True

Question 5.
Gases have a definite shape or volume.
Answer:
False

Question 6.
Matter changes its state when heat is added or removed.
Answer:
True

Question 7.
A fuel is a substance which gives heat energy on burning.
Answer:
True

II. Fill in the blanks:
(Evaporation, Mass, Water, Solid, Stone, Freezing)

Question 1.
The measure of matter ¡n an object is _________.
Answer:
Mass

Question 2.
Change of liquid into vapour on heating is called _______.
Answer:
Evaporation

Question 3.
An example for liquid is _______
Answer:
Water

Question 4.
The change of liquid into solid on cooling is known as _______.
Answer:
Freezing

Question 5.
An example for solid is _______.
Answer:
Stone

III. Draw a line to match the objects and their state of matter:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 1

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 2

IV. Answer in a word or two:

Question 1.
Which of these is a solid: wood or juice? ______
Answer:
Wood.

Question 2.
Which of these is hard : a sponge or a glass or a cloth? ______
Answer:
a glass.

Question 3.
What are three states of matter? _______
Answer:
Solid, Liquid, Gas.

Question 4.
Name three substances which can change to liquid when they are heated?
Answer:
Ice, Cheese, Jaggery.

Question 5.
In which state of matter the particles are very close to each other?
Answer:
Solid State.

Question 6.
What state of matter is rain?
Answer:
Liquid State.

Question 7.
Which among the state of matter has definite size but no definite shape?
Answer:
Liquid State.

Question 8.
What would cause a liquid to turn into a solid?
a) Pouring it into a container
b) Heating it until it boils
c) Cooling it until it freezes
d) Keeping its temperature the same
Answer:
c) Cooling it until it freezes

Question 9.
What are some properties of pencil?
Answer:

Pencil is rigid.
It has definite shape and volume.
It occupies a fixed space.
They cannot move freely.

V. Find me: (Liquid, Water, Wood)

Question 1.
I am a five letter word. I am an essential need for your life. I remain in all the three states of matter. Who am I
Answer:
I am water.

Question 2.
I am a solid. I am obtained from the trees. I am useful for heating. Who am I?
Answer:
I am wood.

Question 3.
I am one among the three states. I have loosely arranged particles. I become vapour on heating. Who am I?
Answer:
I am liquid.

VI. Describe the word in one sentence:

Question 1.
Solid :
Answer:
Solids are things that have a definite shape and volume.

Question 2.
Liquid:
Answer:
Liquids are things that do not have a definite shape but occupies space.

Question 3.
Melting:
Answer:
Change of solid into liquid on heating is called melting.

Question 4.
Evaporation:
Answer:
Change of liquid into vapour on heating is called evaporation.

Question 5.
Freezing:
Answer:
Change of liquid into solid on cooling is known as freezing.

VII. Which change of state is taking place in each description below?

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 3

a. An ice cube turning to water _________
Answer:
Melting

b. Water turning to ice in a freezer _________
Answer:
Freezing

c. Change of liquid into vapour on heating _________
Answer:
Evaporation

d. A bathroom mirror misting up _________
Answer:
Condensation

Intext Activity:

Let us Do (Text Book Page No. 103):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 4

Answer:

House
Chair
Board
Car

Let us Do (Text Book Page No. 105):

Place four 1L bottles of different shapes on the table.
Take a bucket with water.
Call one child to hold the empty bottles and the other to fill water into them using a paper cup.
Ask the other children to fill the table as given below.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 5

Did each bottle need the same number of cups to get filled?
We can see that water takes up the same space in each bottle and the shape of the water is same as the shape of the bottle.
Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 6

Think Zone (Text Book Page No. 105):

Question 1.
What is the shape of water in your bottle?
Answer:
The water takes up the shape of my bottle.

Question 2.
What happens if you pour water on the floor or table?
Answer:
Spread from one place to another place.

Think Zone (Text Book Page No. 106):

Question 1.
Cooking gas in gas cylinder has a smell. Why?
Answer:
Because Ethyl mercaptan is added with LP& to find the leakage.

Let us Do (Text Book Page No. 107):

Say whether it is Solid or Liquid or Gas (Put ‘S’ for Solid, .’L‘ for Liquid and ‘G’ for Gas).

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 7

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 8

Let us Read and Complete the table (Text Book Page No. 108):

Here are some properties of matter:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 9

Copy the following table. Write each property in the correct column of the table. Some properties may belong to more than one column.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 10

Answer:

Properties of solids

Properties of liquids

Properties of gases

Fixed Shape

Rigid

Fixed volume

No fixed shape

Flow all sides

Fixed volume

No fixed shape

Flow all sides

No fixed volume

Let us Do (Text Book Page No. 108):

Question 1.
Take some ice cubes in a container. Heat the container and observe the changes.
Answer:
Ice cubes melt.

Question 2.
Take some cheese in a container.. Heat the container and observe the changes.
Answer:
Cheese melts.

Question 3.
Take some jaggery in a pan. Heat the pan and observe the changes.
Answer:
Jaggery melts.

Let us think (Text Book Page No. 109):

Question 1.
What makes the coconut oil freeze in winter season?

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 11

Answer:
In winter season room temperature will drop down almost below 20°C which is less than the freezing point of coconut oil. So it freeze in winter season.

Complete the table (Text Book Page No. 109):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 12

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 13

Think and answer (Text Book Page No. 109):

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 14

a. Which can was taken from the fridge?
Answer:
Can A.

b. How do you know?
Answer:
Water droplets appear on the can A.

c. How did water droplets appear on the can A?
Answer:
Because of condensation.

d. Why are there no water droplets on can B?
Answer:
Can B is not kept in the fridge.

Let us Understand (Text Book Page No. 109):

Question 1.
Keep a stone on the floor. Does it move by itself?
Answer:
No.

Question 2.
Pour a mug of water on the floor. Does the water flow? Does it flow in one direction?
Answer:
Yes, the water flows in all direction.

Question 3.
Take an air filled balloon. Prick it with a needle. Does the air rush out?
Answer:
Yes.

Question 4.
Fill an open vessel with water. Press the surface of the water with your hands. How do you feel?
Answer:
Water overflows.

Look at the pictures. Write down what you see. (Text Book Page No. 110):
(Wood, Leaves, Paper)

Question 1.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 15

Answer:
Paper burns

Question 2.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 16

Answer:
Wood burns

Question 3.

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 17

Answer:
Leaves burns\

Match the following:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 18

Answer:

Samacheer Kalvi 3rd Standard Science Guide Term 1 Chapter 2 States of Matter 19

3rd Standard Science Guide States of Matter Additional Questions and Answers

I. Choose the correct answer:

Question 1.
_______ becomes liquid and liquid becomes solid on colling.
(a) Matter
(b) Mass
(c) Gas
Answer:
(c) Gas

Question 2.
Change of liquid into solid on cooling is known as __________
(a) freezing
(b) condensation
(c) evaporation
Answer:
(a)freezing

Question 3.
Which one of the following is a solid fuel?
(a) Petroleum
(b) Wood
(c) Diesel
Answer:
(b) Wood

Question 4.
________ has a definite shape.
(a) Solid
(b) Liquid
(c) Gas
Answer:
(a) Solid

II. Write True or False:

Question 1.
Everything you can see and touch is made up of matter.
Answer:
True

Question 2.
The change of solid into liquid on heating is called evaporation.
Answer:
False

Question 3.
Electrical energy is also used as fuel for cooking and transporting.
Answer:
True

Question 4.
Substances when burnt give out heat.
Answer:
True

III. Fill in the blanks:

Question 1.
_______ take the shape of the container.
Answer:
Liquids

Question 2.
_______ is a mixture of gases.
Answer:
Air

Question 3.
The space occupied by an object is called ________.
Answer:
Volume

Question 4.
Everything around us is made up of _________.
Answer:
matter

IV. Answer in a word or two:

Question 1.
What is matter?
Answer:
Anything that occupies space and has mass is called matter.

Question 2.
What is mass?
Answer:
Mass is a measure of how much matter is in an object.

Question 3.
List out the examples of gases?
Answer:

Cloud
Smoke
Wind
Spray
Water vapour

Category: Class 3

Samacheer Kalvi 3rd Standard Social Science Book Solutions Term 1 Chapter 1 Family

Samacheer Kalvi 3rd Standard Science Book Solutions Term 3 Chapter 3 Air

Samacheer Kalvi 3rd Standard Science Book Solutions Term 3 Chapter 2 Animal Life

Samacheer Kalvi 3rd Standard Science Book Solutions Term 3 Chapter 1 Our Environment

Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 3 Plants

Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 2 Water

Samacheer Kalvi 3rd Standard Science Book Solutions Term 2 Chapter 1 Food

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 4 Science in Everyday Life

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 3 Force

Samacheer Kalvi 3rd Standard Science Book Solutions Term 1 Chapter 2 States of Matter