Class 4 Science Chapter 5 Test 1 Updated: 12 Jun 2022 511 Welcome to your Class 4 Science Chapter 5 Test 1 1. ________ is the form of energy that is produced by vibrations in an object. Prism Rainbow Sound Producer 2. _______ can be transformed into another form. Energy Water Both a & b None of these 3. The biggest source of energy is the______. Moon Stars Sun None of these 4. There are _________colors in sunlight. Five Six Seven One 5. The sun, stars and lighting are the _______sources of light. Artificial Natural Thermal Hydro 6. How electricity is produced in thermal power station. Burn coal, oil or gas to change water into steam. The steam is used to run a turbine. The turbine runs a generator to produce electricity. All of these 7. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these 8. the colors present in sunlight are: Red, orange, yellow Green, blue Indigo, violet All of these 9. How hydroelectricity is made? Dam is built and water of river is stored in a lake at certain height. The store water flows very fast through a tunnel and runs a turbine. The turbine runs a generator which produces electricity. All of these 10. In thermal power station, _______ is/are used to produce electricity. Coal Oil Gas All of these 11. Candle, oil lamp, torch, electric bulb are the ________sources of light. Artificial Natural Thermal Hydro 12. _______ travels in all directions in straight lines. Light Coal Mobile cell None of these 13. The ability to do work is called ________. Matter Energy Density Work 14. In windmill, electricity is produced from the energy of_______. Sun Water Coal fast wind 15. Due to _________ of light, we can see our image in mirror. Refraction Reflection Diffraction Diverging Time's up
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