1. Class 15:
Variations in Heating, Heat Transfer

2. 1 2 3 4
88%
0%0%
13%
1. Increase
2. Decrease
3. Remain the
same
4. No way of
knowing

3. 1 2 3 4
50%
0%0%
50%
1. Increase
2. Decrease
3. Remain the
same
4. No way of
knowing

5. 1. Temperature
will increase
2. Temperature
will decrease
3. Temperature
will remain the
same
4. We’re not sure

6. 1 2 3 4 5
0% 0% 0%0%0%
1. Increase
2. Decrease
3. Increase
first, then
decrease
4. No change
5. We’re not sure
what would
happen

8.  Transfer of heat between objects in contact
with each other OR
 Between molecules that are within one object

9.  Vertical movement of fluids
 “Hot Air Rises” ………. And cools down
 Cold air sinks…. And heats up

10.  Horizontal movement of fluids

12.  The heating or cooling of a fluid (liquid or
gas)
 WITHOUT the addition or subtraction of heat

13. 33%
33%
33% 1. Squeeze together and take up less room
2. Spread apart and take up more room
3. Stay the same volume

14. 33%
33%
33% 1. Collide more with other molecules
2. Collide less with other molecules
3. No change in number of collisions

15. 33%
33%
33% 1. Lower temperature
2. Higher temperature
3. No temperature change

16.  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

18.  What happened?
 Why?

19. 1 2 3
0% 0%0%
1. The football
stayed the same
2. The football
became inflated
3. The football lost
air

21. 1 2 3
0% 0%0%
1. The gas will cool
down
2. The gas will
heat up
3. The gas will stay
the same
temperature

23.  Latent = “hidden” heat, used or released
during phase changes
 Sensible = heat that results in temperature
change

24.  Gas – no defined volume or shape
 Liquid – defined volume, takes shape of
container
 Solid – defined volume and shape
 (at constant temperature)

27. 1 2 3 4
0% 0%0%0%
1. Condensation
2. Evaporation
3. Deposition
4. Freezing