The Atmosphere
Mixture of gases that surrounds Earth
What is the Atmosphere?
4 layers
How many layers of the atmosphere are there?
Reflects or absorbs harmful UV light
Movement of air caused differences in air pressure
What is wind?
Located at 0o and 30o N & S
What are trade winds?
Nitrogen 78%
Oxygen 21%
Other 1%
What is the composition of the Atmosphere?
Temp increases as altitude increases
Most of all the matter is here
Where all of life lives
What is the Troposphere?
The greenhouse effect
How does Earth stay warm?
Cold dense air
What is high pressure?
Located at 30o and 60o N&S
Blow from West to east
What are the Westerlies?
measure of the force with which air molecules push down on a surface
What is air pressure?
As altitude increases, temp increases
Hottest layer
The least amount of particles
What is the Thermosphere?
Carbon dioxide water vaper absorb heat and keep earth warm.
Hot less dense air
What is low air pressure?
Located at 60o & 90o N& S
Blow cold air from East to west
What are the Polar Easterlies?
Air pressure decreases
What happens to air pressure as altitude increases?
Temperature decreases as altitude increases.
Where meteoroids burn up
What is the Mesosphere?
Provides air
Reflects harmful UV
Keeps Earth warm
Protects from space debris
How does the atmosphere protect us?
Hot and cold air moves in smaller circular patterns around the world.
What are convection cells?
What are the doldrums and horse latitudes?
Because there is less oxygen on the tops of high mountains.
Why do climbers take oxygen on their hikes up tall mountains?
As altitude increases, temperature increases
Contains the ozone layer
What is the Stratosphere?
Causing the ozone layer to get smaller
What is polution?
The uneven heating of Earths surface.
What causes the wind?
Narrow belt of high speed winds that blow from west to east
What are the Jet Streams?