Class 4 Science Chapter 5 Test 1 Updated: 12 Jun 2022 289 Welcome to your Class 4 Science Chapter 5 Test 1 1. The sun, stars and lighting are the _______sources of light. Artificial Natural Thermal Hydro 2. 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 3. Electricity produced from the fast-flowing water is called as_______. Hydroelectricity Solar Mechanic None of these 4. The ability to do work is called ________. Matter Energy Density Work 5. Candle, oil lamp, torch, electric bulb are the ________sources of light. Artificial Natural Thermal Hydro 6. In windmill, electricity is produced from the energy of_______. Sun Water Coal fast wind 7. ________ is the form of energy that is produced by vibrations in an object. Prism Rainbow Sound Producer 8. In thermal power station, _______ is/are used to produce electricity. Coal Oil Gas All of these 9. There are _______ reserve of sources of energy like coal, oil and gas. Limited Unlimited Vide range None of these 10. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these 11. Coal, oil and gas are made in _______ of years. 10 Hundreds Thousands millions 12. Due to _________ of light, we can see our image in mirror. Refraction Reflection Diffraction Diverging 13. 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 14. Water (flowing), air, coal, oil, gas and wood are the sources of______. energy Sun Gas None of these 15. The biggest source of energy is the______. Moon Stars Sun None of these Time's up
Please Write Your Comments