Class 4 Science Chapter 5 Test 1 Updated: 12 Jun 2022 90 Welcome to your Class 4 Science Chapter 5 Test 1 1. Due to _________ of light, we can see our image in mirror. Refraction Reflection Diffraction Diverging 2. _______ travels in all directions in straight lines. Light Coal Mobile cell None of these 3. _______is a form of energy that helps us to see things around us. Coal Mobile cell Light None of these 4. _______ can be transformed into another form. Energy Water Both a & b None of these 5. ________ is the form of energy that is produced by vibrations in an object. Prism Rainbow Sound Producer 6. Coal, oil and gas are made in _______ of years. 10 Hundreds Thousands millions 7. 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 8. The biggest source of energy is the______. Moon Stars Sun None of these 9. the colors present in sunlight are: Red, orange, yellow Green, blue Indigo, violet All of these 10. In thermal power station, _______ is/are used to produce electricity. Coal Oil Gas All of these 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. 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 13. In windmill, electricity is produced from the energy of_______. Sun Water Coal fast wind 14. There are _________colors in sunlight. Five Six Seven One 15. 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 Time is Up! Time's up
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