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1. What is the direction of energy when you touch a piece of ice? A. both ways; back and forth C. from the ice to the finger B. energy does not flow D. from the finger to the ice 2. Which of the following explains why we can hold the handle of a particular kind of pan with our bare hands? A. The handle is made up of good insulator of heat. B. The handle is made up of good conductor of heat. C. The handle has low thermal conductivity. D. Both A&C 3. Which of the following is expected to have the highest conductivity? A. melting ice B. solid ice C. steam D. tap water 4. Which of the following is an example of heat transfer by radiation? A. boiling water C. heat received by a person from fireplace B. heating of building D. melting chocolate in your hand 5. What color absorbs more heat? A. black B. blue C. red D. white 6. Features of vacuum or thermos flask can keep our drinks hot or cold for longer time. What typ of heat transfer is being prevented in a vacuum or thermos flask? A. conduction B. convection C. radiation D. all the above 7. Why does a piece of metal will feel colder than a piece of wood at the same temperature? A. Metals, in general, have a higher thermal conductivity than wood. B. Metals, in general, are good heat conductors. C. Metals are colder than wood. D. Wood, in general, is a poor insulator. 8. How does heat flow as thermal energy? A. flowing from one object to another C. getting warmer B. getting cooler D. stationary
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