1. Today is Monday, December 10, 2012 Homework: Read Chapter 7, Lesson 4 Warm UP: With your face partner, discuss the definitions of the following terms: - Condensation, Evaporation, Precipitation, Sublimation, Sun, Clouds

2. Goal for Today • SWBAT demonstrate the ability to understand that the water cycle is influenced by temperature, pressure and topography of land by describing the formation of different clouds.

3. Cloud formation • Cloud formation is influenced by: • Air temperature • Amount of water in the air • Air pressure • Air moving upwards to low pressure often creates clouds • Low pressure allows air molecules to expand and cool down (which causes condensation)

4. Types of Clouds • Cirrus = wispy, feathery, made of ice, high altitude • Stratus = dense, low altitude, water vapor (fog is stratus) • Cumulus = puffy, mid to high altitude, water vapor • Thunderhead (cumulonimbus) = powerful upward blasts of air, associated with storms and atmospheric instability • Fog = very low stratus cloud

5. And now for a little bit of…. • Tim and Moby

6. Let’s try to guess the cloud….

7. Closing it up…. • Tell your shoulder partner about at least 2 different types of clouds that we discussed in class today.