Class 4 Science Chapter 5 Test 1 Updated: 12 Jun 2022 867 Welcome to your Class 4 Science Chapter 5 Test 1 1. In windmill, electricity is produced from the energy of_______. Sun Water Coal fast wind None 2. There are _________colors in sunlight. Five Six Seven One None 3. 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 None 4. The sun, stars and lighting are the _______sources of light. Artificial Natural Thermal Hydro None 5. When light strikes the shiny and smooth surface of mirror, it bounces back and enters our eye; this is called ___________of light. Refraction Reflection Diffraction Diverging None 6. Electricity produced from the fast-flowing water is called as_______. Hydroelectricity Solar Mechanic None of these None 7. The biggest source of energy is the______. Moon Stars Sun None of these None 8. the colors present in sunlight are: Red, orange, yellow Green, blue Indigo, violet All of these None 9. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these None 10. Candle, oil lamp, torch, electric bulb are the ________sources of light. Artificial Natural Thermal Hydro None 11. 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 None 12. Due to _________ of light, we can see our image in mirror. Refraction Reflection Diffraction Diverging None 13. 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 None 14. The ability to do work is called ________. Matter Energy Density Work None 15. In thermal power station, _______ is/are used to produce electricity. Coal Oil Gas All of these None Time's up
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