1. What is needed for heat to transfer from one object to another? The two objects should __________ *
a. be cold b. be hot c. have equal temperature d. have different temperature
2. Which of the following always moves from hotter to colder object? *
a. temperature b. heat c. light d. sound
3. A small cup of cold milk is being poured into a big mug half-filled with hot coffee. Which is true about heat transfer in this situation? *
a. Heat will not transfer to either of the liquids. b. Both liquids absorb heat from each other. c. Cold milk transfers heat to the hot coffee. d. Hot coffee transfers heat to the cold milk.
4.Which is the correct sequence of events as convection current occurs in boiling water in a pot placed over a hot stove? 1. Bottom part of the pot conducts heat to the water. 2.The cool, denser water on top will sink. 3. Heated water at the bottom becomes less dense then rise. 4. Hot stove conducts heat to the bottom of the pot *
a. 1 - 4 - 2 - 3 b. 4 - 1 - 3 - 2 c. 4 - 3 - 2 - 1 d. 1 - 2 - 3 - 4
5.Which of the following examples involves heat transfer by conduction? *
a. Sun shining on earth. b. Drying hair with a blower. c. Sitting beside a bonfire d. Walking on hot sand without footwear.
6. This is a required question Which of the following situations involves heat transfer by radiation?
a. cooling fruit juice in a refrigerator b. getting sunburn c. smoke rising d. touching burning coal
7.Which of the following household chores involves convection of heat? *
a. drying clothes under the sun b. frying egg for breakfast c. ironing wrinkled clothes d. boiling water for coffee
8. Why is a light colored shirt preferable to wear during hot days than dark colored ones? *
a. It absorbs less heat. b. It is a good insulator of heat c. It is a good conductor of heat. d. It absorbs more heat.
9. Which is true about heat transfer by radiation? *
a. Actual movement of matter is needed for heat to transfer. b. Heat moves through waves c. Direct contact by touching is needed for heat to transfer. d. Heat cannot transfer without matter.
10. What will eventually happen if you leave a bowl of hot soup for an hour on top of the table in your room? *
a. Heat from the room will transfer to the hot soup. b. Hot soup will eventually cool down to room temperature. c. The soup will become colder than the room. d. The room will become hotter than the hot soup.
11. The ice cubes melt as you hold them in your hand. What is the direction of heat transfer in this situation? *
a. hand to ice cubes b. ice cubes to air c. ice cubes to hand d. hand to air
12. In which of the following can convection current occur? *
a. wood b. water c. vacuum d. aluminum
13. Your house is burning and you notice that the smoke and flame rise, but near the floor is colder and less smoky; that’s why you crawl and manage to get out from your house safely. This observation is an example of what method of heat transfer? *
a. conduction b. pollution c. radiation d. convection
14 .In what direction does heat travel through the chicken soup inside the pan? *
a. sideways to left b. from top to bottom c. from bottom to top d. sideways to right
15. Temperature is a measure of the hotness or coldness of an object. It can be measured in all of the following temperature scales, EXCEPT *
