Composition of the Atmosphere

Weather  
Weather is over a short period of time
Constantly changing
Climate
Climate is over a long period of time
Generalized, composite of weather

Elements of weather and climate
Properties that are measured regularly
Most important elements
Temperature
Humidity
Cloudiness
Precipitation
Air pressure
Winds speed and direction

Air is a mixture of discrete gases
Major components of clean, dry air  
Nitrogen (N) – 78 percent
Oxygen (O2) – 21 percent
Argon and other gases
Carbon dioxide (CO2) – 0.0397 percent – absorbs heat energy from Earth