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Flashcards in Chapter 8 - Heat Deck (11)
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What direction does thermal energy flow?

It flows up

1

When does the movement of thermal energy stop?

When the temperature of the two substances are the same

2

What is conduction?

The transfer of thermal energy through a substance or between substances in contact, by the collision of particles

3

What are examples of good conductors?

Metals
Gold (The best)

4

What are examples of insulators?

Glass
Rubber
Wood

5

How does conduction occur on Earth?

The core melts rock, and causes magma to be pushed to the surface. This causes volcanic eruptions to occur

6

How does heat move by convection?

When liquid is heated, is becomes less dense and is pushed upwards. It then cools and falls back down because it is more dense.

7

How does heat move by radiation?

The sun puts out electromagnetic waves, or rays. Radiant energy is absorbed by conductors on Earth, such as black rock, metal, solar panels

8

What are good absorbers of radiation?

The colour Black
Plants
Solar panels
People

9

What are good reflectors of radiation?

Mirrors
Glass
polished metal (Shiny)

10

How can we manage the transfer of thermal energy?

We use insulators such as fibreglass, and can plant a green roof the absorb thermal energy and prevent it from coming into our homes. we can also use an air-to-air heat exchangers to reduce the cost of heating.