Class 4 Science Chapter 5 Test 3 Updated: 12 Jun 2022 482 Welcome to your Class 4 Science Chapter 5 Test 3 1. We hear echo when sound: Reaches us direct from the source comes after bouncing back from a wall at a certain distance. Comes from a loud speaker Is very loud 2. The temperature of hot objects is _______ than the temperature of cold objects. Smaller Greater Lower None of these 3. The system of life is working due to _______ of one form of energy into another. Creation Destroyed Transformations None of these 4. Electrical energy can be transformed into: Heat Light Sound All of these 5. If you take your hand nearer to the lighted lamp than to the wall, the shadow of your hand: Will not form. will be smaller. Will be bigger Will be the same size 6. In toys, torch, clock etc _______ is used. Cells Batteries Both a & b None of these 7. Electrical energy can be transformed into other forms of energy like: Heat Light Sound All of these 8. The electricity supplied to our homes through _______ Wi Fi Signals Mechanical energy Wires Signals 9. Electricity or electric energy is produced by _______ Water Air Generators None of these 10. In loud speaker, the electrical energy changes into _______ Sound Heat light None of these 11. In heater, the electrical energy changes into _______ Sound Heat light None of these 12. The path of current is called a/an electric ________. Power Energy Heater circuit 13. When the path of electric current is complete, the bulb is _______ ON OFF Both a & b None of these 14. Which of the following is not a form of energy? Light Sound Water Heat 15. _______ helps us to see things. Moon Light Sound None of these Time's up
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