1. Aim: What happens during a change of state?
Do Now: Describe what occurs during the water cycle.

2. Water’s Changes of States
Precipitation:
is any form of water that falls from a cloud.
water vapor is the
most important gas
in the atmosphere.

3. Temperature:
- is a measure of the average kinetic energy in a substance. (particle movement)

4. ESRT Page 13

5. Heat –
the energy transferred from one object to another because of a difference in the objects’ temp.

6. Cover ESRT
Specific heat:
The amount of heat need to raise the temperature of a certain substance by One Degree Celsius.

7. Latent (or “hidden”) Heat:
The heat that is needed to melt or
vaporize a substance with no change in
temperature.

8. * NO CHANGE IN TEMPERATURE
DURING A PHASE CHANGE!!

9. Changes of State
Makes no sense without caption in book

10. Phase Changes: Melting Solid  Liquid = (absorbs heat) Freezing
Liquid  Solid
= (releases heat)
Evaporation
Liquid  Gas

11. Condensation
Gas  Liquid
= (releases heat)
Sublimation
Solid  Gas
= (absorbs heat)
Deposition
Gas  Solid

12. ESRT – Page 1

13. Closure:
Please work to complete the handout on phase changes and states of matter.
States of Matter