Class 15:

Variations in Heating, Heat Transfer

1. Increase

2. Decrease

3. Remain the same

4. No way of knowing

1. Increase

2. Decrease

3. Remain the same

4. No way of knowing

1 2 3 4

8%0%0%

92%1. Temperature will increase

2. Temperature will decrease

3. Temperature will remain the same

4. We’re not sure

1 2 3 4 5

92%

8%

0%0%0%

1. Increase

2. Decrease

3. Increase first, then decrease

4. No change

5. We’re not sure what would happen

Transfer of heat between objects in contact with each other OR

Between molecules that are within one object

Vertical movement of fluids

“Hot Air Rises” ………. And cools down

Cold air sinks…. And heats up

Horizontal movement of fluids

The heating or cooling of a fluid (liquid or gas)

WITHOUT the addition or subtraction of heat

Expansion through decreased pressure = molecules spreading apart, slowing down, cooling off

Compression through increased pressure = molecules being pushed together, colliding more, speeding up, heating up

What happened?

Why?

1 2 3

0%9%

91%

1. The football stayed the same

2. The football became inflated

3. The football lost air

1. The gas will cool down

2. The gas will heat up

3. The gas will stay the same temperature

Latent = “hidden” heat, used or released during phase changes

Sensible = heat that results in temperature change

1 2 3 4

0%

8%8%

83%1. Condensation

2. Evaporation

3. Deposition

4. Freezing