Class 4 Science Chapter 5 Test 1 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 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. Coal, oil and gas are made in _______ of years. 10 Hundreds Thousands millions 4. Electricity produced from the fast-flowing water is called as_______. Hydroelectricity Solar Mechanic None of these 5. The ability to do work is called ________. Matter Energy Density Work 6. The sun, stars and lighting are the _______sources of light. Artificial Natural Thermal Hydro 7. Water (flowing), air, coal, oil, gas and wood are the sources of______. energy Sun Gas None of these 8. There are _______ reserve of sources of energy like coal, oil and gas. Limited Unlimited Vide range None of these 9. 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 10. ________ is the form of energy that is produced by vibrations in an object. Prism Rainbow Sound Producer 11. 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 12. _______ travels in all directions in straight lines. Light Coal Mobile cell None of these 13. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these 14. _______ can be transformed into another form. Energy Water Both a & b None of these 15. There are _________colors in sunlight. Five Six Seven One Time is Up! Time's up
