{"id":19194,"date":"2020-11-20T09:44:32","date_gmt":"2020-11-20T09:44:32","guid":{"rendered":"https:\/\/samacheer-kalvi.com\/?p=19194"},"modified":"2021-12-06T16:02:17","modified_gmt":"2021-12-06T10:32:17","slug":"samacheer-kalvi-5th-science-guide-term-1-chapter-3","status":"publish","type":"post","link":"https:\/\/samacheer-kalvi.com\/samacheer-kalvi-5th-science-guide-term-1-chapter-3\/","title":{"rendered":"Samacheer Kalvi 5th Science Guide Term 1 Chapter 3 Energy"},"content":{"rendered":"

Tamilnadu State Board New Syllabus Samacheer Kalvi 5th Science Guide<\/a> Pdf Term 1 Chapter 3 Energy Text Book Back Questions and Answers, Notes.<\/p>\n

Tamilnadu Samacheer Kalvi 5th Science Solutions Term 1 Chapter 3 Energy<\/h2>\n

Samacheer Kalvi 5th Science Guide\u00a0Energy Text Book Back Questions and Answers<\/h3>\n

Evaluation<\/span>
\nI. Choose the correct Answer:<\/span><\/p>\n

Question 1.
\nWhen diesel is burnt chemical energy is converted into _______.
\na) wind energy
\nb) heat energy
\nc) solar energy
\nd) sound energy
\nAnswer:
\nb) heat energy<\/p>\n

\"Samacheer<\/p>\n

Question 2.
\nRunning water possesses _______.
\na) potential energy
\nb) chemical energy
\nc) kinetic energy
\nd) sound energy
\nAnswer:
\nc) kinetic energy<\/p>\n

Question 3.
\nUnit of energy is _______.
\na) Kilogram
\nb) Newton
\nc) Kelvin
\nd) Joule
\nAnswer:
\nd) Joule<\/p>\n

Question 4.
\nWhich one of the following requires wind energy?
\na) Bicycle
\nb) Photosynthesis
\nc) Parachute
\nd) Automobiles
\nAnswer:
\nc) Parachute<\/p>\n

Question 5.
\nCow dung possesses _______ .
\na) kinetic energy
\nb) chemical energy
\nc) solar energy
\nd) heat energy
\nAnswer:
\nb) chemical energy<\/p>\n

\"Samacheer<\/p>\n

II. Find out the energy conversion that takes place in the following:<\/span><\/p>\n

Question 1.
\nIron box: _______.
\nAnswer:
\nChemical energy to Heat energy<\/p>\n

Question 2.
\nElectric Iron box: _______.
\nAnswer:
\nElectric energy to Heat energy<\/p>\n

Question 3.
\nElectric fan:
\nAnswer:
\nElectric energy to Mechanical energy<\/p>\n

Question 4.
\nSpeaker:
\nAnswer:
\nElectric energy to Sound energy<\/p>\n

Question 5.
\nGenerator: _______.
\nAnswer:
\nMechanical energy to Electrical energy<\/p>\n

\"Samacheer<\/p>\n

III. Find out form of energy possessed by the following things:<\/span><\/p>\n

Question 1.
\nA rock on the top of a hill.
\nAnswer:
\nPontential Energy<\/p>\n

Question 2.
\nA rolling ball.
\nAnswer:
\nKinetic Energy<\/p>\n

Question 3.
\nCharcoal.
\nAnswer:
\nHeat Energy<\/p>\n

Question 4.
\nWater falls.
\nAnswer:
\nKinetic Energy<\/p>\n

Question 5.
\nBattery.
\nAnswer:
\nChemical Energy<\/p>\n

\"Samacheer<\/p>\n

IV. Match the following:<\/span><\/p>\n

\"Samacheer
\nAnswer:<\/p>\n

    \n
  1. e<\/li>\n
  2. d<\/li>\n
  3. a<\/li>\n
  4. c<\/li>\n
  5. b<\/li>\n<\/ol>\n

    \"Samacheer<\/p>\n

    V. Say True or False:<\/span><\/p>\n

    Question 1.
    \nAn apple falling from a tree is an example for kinetic energy.
    \nAnswer:
    \nTrue<\/p>\n

    Question 2.
    \nElectrical energy is used to run electric trains.
    \nAnswer:
    \nTrue<\/p>\n

    Question 3.
    \nHeat energy cannot be produced by friction.
    \nAnswer:
    \nFalse<\/p>\n

    Question 4.
    \nPotential energy and heat energy are the two forms of mechanical energy.
    \nAnswer:
    \nFalse<\/p>\n

    Question 5.
    \nThe unit of energy is joule.
    \nAnswer:
    \nTrue<\/p>\n

    \"Samacheer<\/p>\n

    VI. Answer in brief:<\/span><\/p>\n

    Question 1.
    \nWhat is energy?
    \nAnswer:
    \nEnergy is defined as capacity to do work. S.I unit of work is Joule.<\/p>\n

    Question 2.
    \nWhat are the different forms of energy?
    \nAnswer:
    \nThere are different forms of energy like mechanical energy, heat energy, light energy, wind energy, solar energy, electrical energy, and chemical energy.<\/p>\n

    Question 3.
    \nWhat are the uses of mechanical energy?
    \nAnswer:<\/p>\n

      \n
    • In hydroelectric plants, kinetic energy of water is converted into electrical energy.<\/li>\n
    • Windmills convert kinetic energy of winds into electrical energy.<\/li>\n
    • Mechanical energy of the hammer is used to apply a force on a nail.<\/li>\n
    • Mechanical energy can bring a moving body to rest and make a body at rest to move.<\/li>\n<\/ul>\n

      Question 4.
      \nState the Law of conservation of energy.
      \nAnswer:
      \nLaw of conservation of energy states that energy Can neither be created nor be destroyed. One form of energy is converted into another form of energy.<\/p>\n

      Question 5.
      \nGive the uses of Light energy.
      \nAnswer:<\/p>\n

        \n
      • We are able to see objects with the help of light energy.<\/li>\n
      • Plants use light energy to synthesis their food.<\/li>\n
      • With the help of light energy, our skin is able to synthesis Vitamin D.<\/li>\n
      • Electricity can be produced with the help of light energy.<\/li>\n<\/ul>\n

        \"Samacheer<\/p>\n

        VII. Answer in detail:<\/span><\/p>\n

        Question 1.
        \nExplain the types of Mechanical energy.
        \nAnswer:
        \nEnergy possessed by an object due its position is called mechanical energy.
        \nMechanical energy can be classified into two;<\/p>\n

          \n
        • Kinetic energy<\/li>\n
        • Potential energy<\/li>\n<\/ul>\n

          a) Kinetic energy: Energy possessed by a moving objectis known as kinetic energy. It is also known as energy of motion.
          \nEg: Moving car, cricket ball bowled by a player, bullet coming out of a gun.<\/p>\n

          b) Potential energy: Energy possessed by an object which is at rest is known as potential energy. It is also known as stores energy of position.
          \nEg: Object lifted above, stone in the stretched rubber, water in the dam.<\/p>\n

          Question 2.
          \nExplain Conservation of energy.
          \nAnswer:
          \nEnergy cannot be created cannot be destroyed also. It is changed from one form to another form or transferred from one object to another object. Examples for conservation of energy in our daily life are :<\/p>\n

          1. Water dam :<\/p>\n

            \n
          • Water stored in water dams posseses potential energy.<\/li>\n
          • When water falls down, potential energy of water is converted, into kinetic energy.<\/li>\n
          • Kinetic energy of water rotates the turbines and electric energy is generated.<\/li>\n<\/ul>\n

            2. Electrical appliances:<\/p>\n

              \n
            • Electrical energy is used in many domestic appliances such as electric stove, iron box and fan.<\/li>\n
            • Electric energy flows into the coil in the devices.<\/li>\n
            • As current flows, it heats up the coil.<\/li>\n
            • With the help of this heat energy, we do many useful works.<\/li>\n
            • Thus, electrical energy is converted into heat energy.<\/li>\n
            • Electical energy is converted to mechanical energy in fan, light enrgy in bulb and sound energy in computer.<\/li>\n<\/ul>\n

              3. Driving a car:<\/p>\n

                \n
              • We use fuel in the form of petrol or diesel or gas to run vehicles.<\/li>\n
              • When this fuel burns in the engine, chemical energy is converted into heat energy.<\/li>\n
              • Burning fuel produces hot gases which pushes the piston in the engine to move the vehicle.<\/li>\n
              • Thus heat energy is converted into mechanical energy.<\/li>\n<\/ul>\n

                \"Samacheer<\/h3>\n

                Samacheer Kalvi 5th Science Guide Energy Additional Questions and Answers<\/h3>\n

                I. Choose the correct Answer:<\/span><\/p>\n

                Question 1.
                \n___________ is the only form of energy visible to human eye.
                \na) Heat energy
                \nb) Light energy
                \nc) Electrical energy
                \nd) Chemical energy
                \nAnswer:
                \nb) Light energy<\/p>\n

                Question 2.
                \nLight travels at a speed of _________.
                \na) 3,00,000 km\/s
                \nb) 4,00,000 km\/s
                \nc) 5,00,000 km\/s
                \nd) 6,00,000 km\/s
                \nAnswer:
                \na) 3,00,000 km\/s<\/p>\n

                Question 3.
                \nSunlight takes _________ to reach earth.
                \na) 5 minutes
                \nb) 6 minutes
                \nc) 7 minutes
                \nd) 8 minutes
                \nAnswer:
                \na) 5 minutes<\/p>\n

                Question 4.
                \nWhich of the following device converts chemical energy into electrical energy?
                \na) Battery
                \nb) Loud speaker
                \nc) Solar cell
                \nd) Electrical motor
                \nAnswer:
                \na) Battery<\/p>\n

                Question 5.
                \n___________ stands first in generating electricity from wind mill.
                \na) Kerala
                \nb) Tamil Nadu
                \nc) Karnataka
                \nd) Andhra pradesh
                \nAnswer:
                \nb) Tamil Nadu<\/p>\n

                \"Samacheer<\/p>\n

                Question 6.
                \nThe energy, possessed by a object due to its position is called _______.
                \na) Kinetic energy
                \nb) Potential energy
                \nc) Mechanical energy
                \nd) Electrical energy
                \nAnswer:
                \nb) Potential energy<\/p>\n

                Question 7.
                \nThe energy possessed by a cricket ball bowled by a player is _______.
                \na) Potential energy
                \nb) Kinetic energy
                \nc) Mechanical energy
                \nd) Electrical energy.
                \nAnswer:
                \nb) Mechanical energy<\/p>\n

                Question 8.
                \nElectric eel is a _______.
                \na) fish
                \nb) snake
                \nc) frog
                \nd) none of the above
                \nAnswer:
                \na) fish<\/p>\n

                Question 9.
                \nWhich of the following is the example potential energy?
                \na) Object lifted above
                \nb) Bullet coming out of a sun
                \nc) Moving car
                \nd) Cricket ball bowled by a player
                \nAnswer:
                \nc) Moving car<\/p>\n

                Question 10.
                \nWhat energy is possessed by stretched rubber.
                \na) Nuclear
                \nb) Potential
                \nc) Kinetic
                \nd) Thermal
                \nAnswer:
                \nb) Potential<\/p>\n

                \"Samacheer<\/p>\n

                II. Fill in the blanks:<\/span><\/p>\n

                Question 1.
                \n_______ is a measure of heat in a body.
                \nAnswer:
                \nTemperature<\/p>\n

                Question 2.
                \n________ use wind energy to generate electricity.
                \nAnswer:
                \nWindmills<\/p>\n

                Question 3.
                \nThe form of energy that produces feeling of hotness is called as _______.
                \nAnswer:
                \nheat<\/p>\n

                Question 4.
                \nLight energy helps our skin to synthesis _________.
                \nAnswer:
                \nvitamin – b<\/p>\n

                Question 5.
                \nWhen stored water falls down, potential energy of water is converted into _______.
                \nAnswer:
                \nKinetic energy<\/p>\n

                Question 6.
                \nElectric eel can generate _______.
                \nAnswer:
                \nelectricity<\/p>\n

                Question 7.
                \nLaw of conversation of energy given by _________.
                \nAnswer:
                \nJulius Robert Mayar<\/p>\n

                \"Samacheer<\/p>\n

                III. Say True or False:<\/span><\/p>\n

                Question 1.
                \nLight does not require any medium to travel.
                \nAnswer:
                \nTrue<\/p>\n

                Question 2.
                \nMechanical energy can be used for pumping water.
                \nAnswer:
                \nFalse<\/p>\n

                Question 3.
                \nHeat energy is used to run vehicles.
                \nAnswer:
                \nTrue<\/p>\n

                Question 4.
                \nHeat is measured in Joule.
                \nAnswer:
                \nTrue<\/p>\n

                Question 5.
                \nWater stored in water dams possesses kinetic energy.
                \nAnswer:
                \nFalse<\/p>\n

                Question 6.
                \nPhotosynthesis changes solar energy into chemical energy.
                \nAnswer:
                \nTrue<\/p>\n

                Question 7.
                \nWind mills convert kinetic energy of winds into electrical energy.
                \nAnswer:
                \nTrue<\/p>\n

                \"Samacheer<\/p>\n

                IV. Circle the odd one:<\/span><\/p>\n

                Question 1.
                \na) Proton
                \nb) Dentron
                \nc) Electron
                \nd) Neutron
                \nAnswer:
                \nb) Dentron<\/p>\n

                Question 2.
                \na) Nuclear power plants
                \nb) Hydroelectric plants
                \nc) Water heaters
                \nd) Windmills
                \nAnswer:
                \nc) Water heaters<\/p>\n

                \"Samacheer<\/p>\n

                V. Match the following:<\/span><\/p>\n

                Question 1:<\/p>\n

                \"Samacheer
                \nAnswer:<\/p>\n

                  \n
                1. d<\/li>\n
                2. a<\/li>\n
                3. b<\/li>\n
                4. c<\/li>\n<\/ol>\n

                  Question 2.<\/p>\n

                  \"Samacheer
                  \nAnswer:<\/p>\n

                    \n
                  1. d<\/li>\n
                  2. c<\/li>\n
                  3. b<\/li>\n
                  4. a<\/li>\n<\/ol>\n

                    \"Samacheer<\/p>\n

                    VI. Answer briefly:<\/span><\/p>\n

                    Question 1.
                    \nWhat is mechanical energy?
                    \nAnswer:<\/p>\n

                      \n
                    • Energy possessed by an object due to its position is called mechanical energy.<\/li>\n
                    • Mechanical energy can be classified into two.\n
                        \n
                      • \n
                          \n
                        • Kinetic energy<\/li>\n
                        • Potential energy<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

                          Question 2.
                          \nWhat is energy of motion? Give examples.
                          \nAnswer:
                          \nEnergy possessed by a moving object is known as kinetic energy. It is also known as energy of motion.
                          \nExamples: Moving car, Cricket ball bowled by a player, Bullet coming out of a gun.<\/p>\n

                          Question 3.
                          \nWrite any two uses to mechanical energy.
                          \nAnswer:<\/p>\n

                            \n
                          • Windmills convert kinetic energy of winds into electrical energy.<\/li>\n
                          • Mechanical energy of the hammer is used to apply a force on a Class nail.<\/li>\n<\/ul>\n

                            Question 4.
                            \nWhat is wind energy and write its uses?
                            \nAnswer:
                            \nEnergy possessed by the wind is known as wind energy.
                            \nUses of wind energy<\/p>\n

                              \n
                            • Wind mills use wind energy to generate electricity.<\/li>\n
                            • Ships sail by the power of wind.<\/li>\n
                            • Sports like wind surfing, sailing, kite surfing use wind energy.<\/li>\n
                            • Wind energy can be used for pumping water.<\/li>\n<\/ul>\n

                              \"Samacheer<\/p>\n

                              Question 5.
                              \nName the particles of atom?
                              \nAnswer:
                              \nAtoms possess particles like protons, electrons, and neutrons.<\/p>\n

                              Question 6.
                              \nWhat is electric energy?
                              \nAnswer:
                              \nMovement of electron in the objects causes energy. This energy is called electric energy.<\/p>\n

                              Question 7.
                              \nWhat are the different ways electricity can be generated?
                              \nAnswer:
                              \nElectric energy is also generated from nuclear power plants, hydroelectric plants, and windmills. It is also generated from solar energy.<\/p>\n

                              Question 8.
                              \nWrite the uses of Electric energy.
                              \nAnswer:<\/p>\n

                                \n
                              • Electric energy is needed for the working of fan, light, television, washing machine, refrigerator, etc.<\/li>\n
                              • Electric iron box, electric stove, and electric water heater work by electrical energy.<\/li>\n
                              • It is used to run cars and trains.<\/li>\n
                              • It is used in factories to produce materials.<\/li>\n<\/ul>\n

                                Question 9.
                                \nWhat is law of conservation of energy?
                                \nAnswer:
                                \nLaw of conservation of energy states that energy can neither be created nor be destroyed. One form of energy is converted into another form of energy. This law was given by Julius Robert Mayor.<\/p>\n

                                Question 10.
                                \nWhat energy transfer happen in a car engine?
                                \nAnswer:
                                \nWhen Petrol or diesel or gas burns in the engine, chemical energy is converted into heat energy. Burning fuel produces hot gases which pushes the piston in the engine to move the vehicle. Thus heat energy is converted into mechanical energy.<\/p>\n

                                \"Samacheer<\/p>\n

                                VII. Answer in detail:<\/span><\/p>\n

                                Question 1.
                                \nWrite the uses of heat energy and light energy.
                                \nAnswer:
                                \nUses of heat energy:<\/p>\n

                                  \n
                                • Heat energy obtained from power stations is used to generate electricity.<\/li>\n
                                • Heat energy obtained from petrol and diesel is used to run vehicles.<\/li>\n
                                • We cook food with the help of heat. Heat energy renders the food material soft and easy to digest.<\/li>\n
                                • Hard substances like iron are heated to mold them into different shapes.<\/li>\n
                                • Heat is used to dry clothes and other wet substances.<\/li>\n<\/ul>\n

                                  Uses of light energy:<\/p>\n

                                    \n
                                  • We are able to see objects with the help of light energy.<\/li>\n
                                  • Plants use light energy to synthesis their food.<\/li>\n
                                  • With the help of light energy, our skin is able to synthesis Vitamin-D.<\/li>\n
                                  • Electricity can be produced with the help of light energy.<\/li>\n<\/ul>\n

                                    Question 2.
                                    \nExplain about chemical energy and its uses.
                                    \nAnswer:
                                    \nChemical energy:
                                    \nChemical energy is stored in substances when atoms join together to form chemical compounds. When two or more chemical substances react with each other, this energy is released.<\/p>\n

                                    Uses of chemical energy:<\/p>\n

                                      \n
                                    • The food we eat contains chemical energy.<\/li>\n
                                    • Chemical energy in wood provides heat energy which helps us to cook food.<\/li>\n
                                    • Chemical energy in coal is used to generate electricity.<\/li>\n
                                    • Batteries we use in our daily life contain chemical energy.<\/li>\n
                                    • Fuels like petrol and diesel possess chemical energy which is used to run vehicles.<\/li>\n<\/ul>\n

                                      \"Samacheer<\/p>\n

                                      Question 3.
                                      \nDraw the diagram to show how the electric energy generated from water.
                                      \nAnswer:
                                      \n\"Samacheer<\/p>\n","protected":false},"excerpt":{"rendered":"

                                      Tamilnadu State Board New Syllabus Samacheer Kalvi 5th Science Guide Pdf Term 1 Chapter 3 Energy Text Book Back Questions and Answers, Notes. Tamilnadu Samacheer Kalvi 5th Science Solutions Term 1 Chapter 3 Energy Samacheer Kalvi 5th Science Guide\u00a0Energy Text Book Back Questions and Answers Evaluation I. Choose the correct Answer: Question 1. When diesel …<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[8],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/posts\/19194"}],"collection":[{"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/comments?post=19194"}],"version-history":[{"count":1,"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/posts\/19194\/revisions"}],"predecessor-version":[{"id":48235,"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/posts\/19194\/revisions\/48235"}],"wp:attachment":[{"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/media?parent=19194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/categories?post=19194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/samacheer-kalvi.com\/wp-json\/wp\/v2\/tags?post=19194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}