# Heat, Temperature, and Energy | Discovery Education

## 17 Video Interactions

1. 00:00:27

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2. 00:00:27

01:34

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3. 00:00:27

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4. 00:02:48

What is the internal energy of matter called?

• chemical energy

• mechanical energy

• sound energy

• thermal energy

5. 00:03:18

The flow of thermal energy from one place to another is called __________.

• heat

• temperature

• matter

• cool

6. 00:03:33

How does heat always flow?

• It flows from something cooler to something warmer.

• It flows from something warmer to something cooler.

• It flows from something warmer to something hotter.

• It flows from something cooler to something cold.

7. 00:04:37

What happens to the molecules in something when it is heated?

• They slow down.

• They disappear.

• They stay the same.

• They speed up.

8. 00:05:38

As the experiment with the ring and ball shows, what happens when most substances are heated and cooled?

• They expand (get larger) when heated and contract (get smaller) when cooled.

• They expand (get larger) when cooled and contract (get smaller) when heated.

9. 00:08:03

__________________ is a measure of the speed with which the molecules in a substance are, on average, moving.

• Heat

• Temperature

• Calories

• Weight

10. 00:09:47

Which has more thermal energy - heat?

• A candle

11. 00:12:34

How is heat transferred through a solid?

• Conduction

• Convection

• Evaporation

12. 00:14:15

Which of these is a good conductor of thermal energy (heat)?

• wood

• metals

• plastic

• fiberglass

13. 00:14:26

Which of these is a good insulator of thermal energy (heat)?

• steel

• copper

• plastic

• aluminum

14. 00:16:00

How is heat transferred in liquids and gases? As gas or liquid is heated, its molecules move farther apart and it becomes less dense; as it becomes less dense, it rises; when it cools, it becomes more dense and sinks. This is called________________.

• conduction

• evaporation

• convection

15. 00:16:38

The main source of heat energy on earth is the  .

• sun, Sun, the sun, the Sun, sun., Sun., the sun., the Sun.

16. 00:17:57

Heat that is transferred with electromagnetic waves is called __________.

• conduction

• evaporation

• convection

17. 00:19:01