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Direction: Encircle the letter of the best answer. 1. How does heat travels? A. from bottom to top B. from cold to hot C. from hot to cold D. from side to side 2. What energy transfer is shown through direct contact of the heat source and the body receiving the heat? A conduction B. convection C. heat D. radiation 3. Which of the following materials are good conductors? A ceramics B. metals C. plastics D. wood 4. What do you call a material through which heat passes slowly or not at all A conductor B. conduction C. insulator D. molecule 5. What happens to the temperature when the particles move faster? A. The temperature can't be taken. B. The temperature goes higher. C. The temperature goes lower. D. The temperature stays the same 6. What may happen to a solid material when it continuously exposed to heat? A. It may become heavier. B. It may decrease in volume. C. It may expand D. It may melt. 7. Which of these activities show heat transtor by radiation? A. boiling egg B. heating the wire C. lighting the room with a bulb D. refrigeration 8. Which of the following does NOT show transfer of heat energy? A boiling water in a kettle B. cutting paper in small pieces C. lighting a roon with a fluorescent lamp D. placing a spoon in a cup of bot coffee 9. When one uses an exhaust fan, what kind of heat transfer is demonstrated? A. conduction B. convection C. conductor D. radiation 10. Which type of heat transfer is happening when the Sun warms your face? A. conduction B. convection C. energy D. radiation
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