Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 1 Chapter 2 Matter and Materials Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 1 Chapter 2 Matter and Materials

Samacheer Kalvi 4th Science Guide  Matter and Materials Text Book Back Questions and Answers

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

I. Pick out the odd one :

Question 1.
brick, coir, silk cloth, pine apple
Answer:
Silk cloth

Question 2.
stone, rubber band, cycle tube, electric wire
Answer:
Stone

Question 3.
sun, candle, torch, pen
Answer:
Pen

Question 4.
umbrella, sponge, rain coat, jerkin
Answer:
Sponge

Question 5.
glass bottle, exam pad, paper plate, wooden board
Answer:
Glass bottle

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

II. Fill in the Blanks :

Question 1.
Materials which can be compressed or cut easily are called __________.
Answer:
Soft materials

Question 2.
Gold and diamond are the examples of ___________ materials.
Answer:
Shiny

Question 3.
Materials which can be bent or stretched easily are called ___________.
Answer:
Flexible

Question 4.
__________ objects allow all the light to pass through them.
Answer:
Transparent

Question 5.
___________ is the natural source that stimulates sight and makes things
Answer:
Light

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

III. Match the following: (Text Book Page No. 101)

Question 1.
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 24
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 2

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

IV. Say True or False :

Question 1.
We cannot compress, cut or bend the rough materials easily.
Answer:
False

Question 2.
Dull materials reflect light.
Answer:
False

Question 3.
Sand paper is a good example for smooth materials.
Answer:
False

Question 4.
Opaque objects do not allow light to pass through them.
Answer:
True

Question 5.
Mirrors change the direction of light that fall on them.
Answer:
True

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

V. Answer the following questions :

Question 1.
When can you say a material is waterproof material?
Answer:
Materials that do not allow water to pass through them are called water proof material.
Example: raincoat, aluminium foil of tablet strip.

Question 2.
What is a light source?
Answer:
The objects that give off light are called light source.
Example: Sun or sources like an electric lamp or a bulb

Question 3.
What is the difference between transparent and opaque materials?
Answer:

Transparent materials

Opaque materials

1.      Transparent objects allow the lights to pass through them. Opaque objects do not allow light to pass through them.
2.      We can see other objects clearly through transparent objects. We cannot see through opaque objects.
3.      Example: air, glass, pure water. Example: wood, stone and metals.

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Question 4.
Define reflection.
Answer:
The bouncing of light by any smooth or polished surface is called

Question 5.
Classify the objects given below as transparent, translucent or opaque materials.

Transparent materials Translucent materials Opaque materials

Answer:
(Air, Rock, Water, Aluminium foil, Mirror, Snow, Wooden board, Polythene bag, CD, Oil soaked paper, Glass tumbler and Coloured glass)

Transparent materials

Translucent materials

Opaque materials

Air Polythene bag Oil Rock
Water soaked paper Aluminium foil
Mirror                     – Snow
Glass tumbler Coloured glass Wooden board, CD

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Samacheer Kalvi 4th Science Guide  Matter and Materials Intext Questions and Answers

Try to Answer :(Text Book Page No. 95)

Question 1.
Look at the pictures and identify the materials by which they are made of :
(paper, clay, glass, wood, plastic, metal rubber, wax)
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 3
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 4

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Try to Answer :(Text Book Page No. 96)

Question 1.
Match the objects that are made of same material
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 5
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 6

  1. (a) 1 (b) 3 (c) 2
  2. (a) 2 (b) 1 (c) 3
  3. (a) 3 (b) 2 (c) 1

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Try to Answer :(Text Book Page No. 96)

Write whether the given materials are hard or soft.
Question 1.
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 23
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 8

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Try to Answer :(Text Book Page No. 97)
Sort the given objects as rough or smooth.
Question 1.
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 22
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 10

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Try to Answer :(Text Book Page No. 97)

Text the flexibility.

Give one plastic scale and wooden scale to the students. Ask them to bend. Tabulate their observation (bends, does not
bend).
Question 1.
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 11
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 12

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Try to Answer :(Text Book Page No. 99)

Write whether the objects are transparent, translucent or opaque.
Question 1.
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 13
Answer:
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 14

Samacheer Kalvi 4th Science Guide  Matter and Materials Additional Questions and Answers

I. pick out the odd one :

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

Question 1.
Rope, Salt paper, Mirror Ball, Wood
Answer:
Mirror Ball

Question 2.
glass, raincoat, aluminum foil, tablet strip
Answer:
Glass

Question 3.
candle, mirror, silk cloth, tiles
Answer:
Candle

Question 4.
stainless steel, foam, gold, diamond
Answer:
Foam

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

II. Say True or False :

Question 1.
A block of wood is opaque.
Answer:
True

Question 2.
A clear window is opaque.
Answer:
False

Question 3.
Soft materials can be early compressed.
Answer:
True

Question 4.
Smooth materials do not have ups and downs
Answer:
True

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

III. Match the following :
Question 1.
Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 matter and materials 15
Answer:

  1.  – b
  2.  – a
  3.  – d
  4.  – c

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

IV.Choose the correct answer :

Question 1.
Soft material
(a) Rope
(b) Soap
(c) Salt paper
(d) Stone
Answer:
(b) Soap

Question 2.
Which material is transparent?
(a) Glass
(b) White plastic
(c) Coir
(d) Snow
Answer:
(a) Glass

Question 3.
An object that blocks all of the light from passing through is
(a) Transparent
(b) Clear
(c) Opaque
(d) Translucent
Answer:
(c) Opaque

Question 4.
Which among the following is an example of dull material?
(a) Stainless steel
(b) Gold
(c) Candle
(d) Diamond
Answer:
(c) Candle

Question 5.
Materials which have ups and and downs on their surface are called .
(a) Smooth material
(b) Rough material
(c) Shiny material
(d) Hard material
Answer:
(b) Rough material

Question 6.
Rubber band is an example of
(a) Rough material
(b) Flexible material
(c) Rigid material
(d) Smooth material
Answer:
(b) Flexible material

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

V. Fill in the blanks :

Question 1.
__________ through which light can pass partially.
Answer:
Translucent

Question 2.
___________ through which light can pass completely.
Answer:
Transparent

Question 3.
____________ through which light cannot pass.
Answer:
Opaque

Question 4.
Materials which reflect the light well are called ____________
Answer:
Shiny material

Samacheer Kalvi 4th Science Guide Term 1 Chapter 2 Matter and Materials

VI. Answer the following questions in one or two sentences :

Question 1.
Name some examples for shiny materials?
Answer:
Materials which reflect the light well are called shiny materials.
Example: Stainless steel, gold and diamond.

Question 2.
What is material?
Answer:
The matter from which a thing is made of is called Material.
For example: Chair is made of wood, Eraser is made of rubber, Candle is made of wax.

Question 3.
Differentiate hard and soft materials.
Answer:

Hard materials

Soft materials

1.      Materials which cannot be easily compressed, cut, bent or scratched are called hard materials. Materials which can be easily compressed, cut, bent or scratched are called soft materials.
2.       Example: Brick, bone and steel. Example: Foam, clay and skin.

Question 4.
What happens when light hits a transparent object?
Answer:

  • Transparent objects allow the light to pass through them.
  • So, we can see other objects clearly through Transparent Objects.
  • Examples: Air, glass and pure water.

Question 5.
What is Translucent objects? Give an example.
Answer:

  • Translucent objects allow some light to pass through them. So, we cannot see objects clearly, but we see them as blurred images through them.
  • Examples: Paper soaked in oil, snow and vegetable oil.

Question 6.
What is light sources?
Answer:

  • Light may come either from the Sun or from other sources like an electric lamp or a bulb.
  • The objects that give off light are called light sources.