Class 4 Science Chapter 5 Test 1 Updated: 12 Jun 2022 499 Welcome to your Class 4 Science Chapter 5 Test 1 1. In thermal power station, _______ is/are used to produce electricity. Coal Oil Gas All of these 2. the colors present in sunlight are: Red, orange, yellow Green, blue Indigo, violet All of these 3. There are _________colors in sunlight. Five Six Seven One 4. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these 5. Due to _________ of light, we can see our image in mirror. Refraction Reflection Diffraction Diverging 6. Candle, oil lamp, torch, electric bulb are the ________sources of light. Artificial Natural Thermal Hydro 7. _______ can be transformed into another form. Energy Water Both a & b None of these 8. 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 9. In windmill, electricity is produced from the energy of_______. Sun Water Coal fast wind 10. 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 11. The biggest source of energy is the______. Moon Stars Sun None of these 12. Coal, oil and gas are made in _______ of years. 10 Hundreds Thousands millions 13. The ability to do work is called ________. Matter Energy Density Work 14. After rain when sunlight pass through water droplets suspended in the air, they divide it into seven colors which is called________. Prism Rainbow Both a & b None of these 15. _______ travels in all directions in straight lines. Light Coal Mobile cell None of these Time's up
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