1. Aim: How does the atmosphere store energy?
States of Matter
Aim: How does the atmosphere store energy?

2. DO NOW:
If you were to put a pot on the stove and fill it with ice, as it begins to heat up, what you expect to happen? Predict what will happen to the temperature, and explain why you think that this will happen.

3. Introduction
It is clear that large quantities of energy are stored in the atmosphere and released in weather events. That energy is stored in a special form of heat energy called latent heat. Latent means hidden or not apparent.
I. Latent Heat- energy that is absorbed or released when matter changes state.

4. II. Specific Heat- the energy needed to raise the temperature of 1 gram of a substance 1oC, without changing its state.
a. The higher the specific heat of a substance, the more energy needed to raise its temperature.
b. For example- It takes about 33 times as much energy to heat 1g of water than it takes to heat 1g of lead

5. Heating Curve for Water

6. EX- Dry Ice
EX-Winter time you can see your breath
EX-Frost Forming on Windows

7. ESRT Pg 1

8. Practice Questions
The change from the vapor phase to the liquid phase is called
(a) evaporation (c) precipitation
(b) condensation (d) transpiration
2. If equal masses of water in various phases (states) are compared, which phase will contain the greatest amount of stored energy (latent heat)?
(a) solid ice (b) liquid water (c) water vapor

9. 3. Why is the condensation of water vapor considered to be a process that heats the air?
(a) Liquid water has a lower specific heat than water vapor
(b) Energy is released by water vapor as it condenses
(c) Water vapor must absorb energy in order to condense
(d) Air can hold more water in the liquid phase than in the vapor phase.
4. During which phase change of water is the most energy released into the environment?
(a) water freezing (c) water evaporating
(b) ice melting (d) water vapor condensing