Homework for tonight: Copy notes below in black AND copy the data table:

Air Pressure notes (continued):

Air pressure can increase or decrease for many reasons, including:

• Uneven heating of the Earth's surface by the Sun; 
• Changes in elevation, temperature, or moisture. 

Air in some areas has different temperatures, or different amounts of pressure and moisture. 

"Air mass" is what we call a packet of air with the same temperature,  pressure and moisture. High Pressure and Low Pressure air masses move across Earth's surface. This causes changes in weather.  


Notes for tomorrow's lesson:

Date: Nov. 30, 2016

Topic: History of Earth’s Atmosphere

Obj: TSW Use cards to see how & why relative amounts of CO2 & O2 have changed over Earth’s history.

Copy this data table into your science notebook below these notes:  
 
 —Vocab: (write the word in your notes, write the words and definition in your vocab section):

—Climatologists are scientists who study the earth’s climates. They use such factors as temperature and precipitation to describe different types of climate.