Class 4 Science Chapter 5 Test 1 Updated: 12 Jun 2022 700 Welcome to your Class 4 Science Chapter 5 Test 1 1. Coal, oil and gas are made in _______ of years. 10 Hundreds Thousands millions None 2. In thermal power station, _______ is/are used to produce electricity. Coal Oil Gas All of these None 3. the colors present in sunlight are: Red, orange, yellow Green, blue Indigo, violet All of these None 4. Water (flowing), air, coal, oil, gas and wood are the sources of______. energy Sun Gas None of these None 5. ________ is the form of energy that is produced by vibrations in an object. Prism Rainbow Sound Producer None 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 None 7. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these None 8. Electricity produced from the fast-flowing water is called as_______. Hydroelectricity Solar Mechanic None of these None 9. 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 10. The ability to do work is called ________. Matter Energy Density Work None 11. In windmill, electricity is produced from the energy of_______. Sun Water Coal fast wind None 12. 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 13. There are _______ reserve of sources of energy like coal, oil and gas. Limited Unlimited Vide range None of these None 14. _______ can be transformed into another form. Energy Water Both a & b None of these None 15. Due to _________ of light, we can see our image in mirror. Refraction Reflection Diffraction Diverging None Time's up
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