1. Air Masses and Fronts D 68-73 http://www.weatherquestions.com/What_is_an_air_mass.htm

2. Bellwork 10/5-10/6 1. List three things you know about weather forecasting. (level 3) 2. Draw a map similar to the one on page D 69. (level 4) 3. Label the parts of the map that show: wind direction, wind speed, air pressure, pressure changes, cloud cover, and air temperature. (level 5)

3. Bellwork 10/7-10/8 1. Describe the picture of the thunderstorm on page D 68. (level 3) 2. Describe weather conditions that are portrayed in the photograph. ( level 4) 3. Describe other conditions present in thunderstorms that are not visible in the picture. (level 5)

4. Bellwork 10/8-10/11 1. Why are air masses that form over the Gulf of Mexico warm and moist?(level 3) 2. Which region on the earth that supplies air masses differs the most from the Gulf of Mexico? Why? (level 4) 3. What is a front? How does it form? (level 3) 4. What happens when cold air meets war air? Why? (level 4)

5. Bellwork 10/12-10/13 1. What kind of weather would you expect if a cold air mass moved into a warm air mass, and the cold air moved under the warm air? (level 4) 2. What weather would you expect if warm air moved in above cold air Why? (level 4)

6. Bellwork 10/14-10/15 1. What kind of weather would you expect a cold front to produce? (level 4) 2. What kind of weather does a warm front produce? (level 4)