The study of the atmosphere at any and its phenomena

The force acting on an object due to gravity

mass X gravity

The amount of mass in a given space

mass / volume

Main gasses of Earth's atmosphere

Where are they found and how much?

Nitrogen(N₂) 78%

Oxygen(O₂) 21%

Argon(Ar) <1%

All are found near the surface

Troposphere

Stratosphere

Mesosphere

Thermosphere

Tropopause-Between the Troposphere and the Stratosphere

Stratopause- Between the Stratosphere and the Mesosphere

Mesopause-Between the Mesosphere and the Thermosphere

• The layer of the atmosphere where life inhabits
• temperature decreases with height because it's heated by the surface and not directly by sunlight
• almost all weather occurs here
• average lapse rate is 6.5⁰ C per 1000m (3.6⁰ F per 1000ft)
• makes up 80% of the atmosphere's mass
  

• Most ozone gas occurs here
• Temperature increases with height because the ozone layer increases ultraviolet light and warms up
  
• Very little mixing occurs between this layer and the troposphere, except during thunderstorms and other strong storms
  

• The coldest layer of the atmosphere
• Temperature decreases with height
• Goes up to ~53 miles
• 99.9% of the atmosphere's mass occurs below this level
  

• Warmest layer of the atmosphere because of the high energy radiation being absorbed by gasses
  
• temperature increases with height
• Goes up to ~75 miles
  
• No clear separation between this layer and the interplanetary space
• Ionosphere and aurora are found here
• Exosphere begins here and goes to ~350 miles