Earth's Atmosphere
Nitrogen
75 percent of the atmosphere is located in this layer.
Troposphere
movement of air from areas of high pressure to areas of low pressure
winds
Which type of Radiation are the colors that we see?
Visible Light
_____ air rises, while _____ air falls.
Warm, Cold
What percent of Earth's atmosphere is made up of oxygen?
21%
This is the outermost layer of the atmosphere.
Exosphere
Give two characteristics of Local Winds
-blow over short distances
-create unequal heating
-occur in a small area
-include land and sea breezes
This form of heating happens when the atmosphere touches the Earth.
Conduction
Rising warm air creates an area of ____ pressure.
Low pressure
What is Earth's atmosphere important?
Give TWO reasons
-Protects us from radiation
-Protects us from meteors
-Makes Earth livable
Which layer contains Earth's ozone layer?
Stratosphere
Give two characteristics of Global Winds.
-blow steadily over long distances
-created by unequal heating
-occur over large areas
-such as global wind belts
_______________ currents are formed when warm air from Earth's surface rises and cool air falls.
Convection
What kind of weather would we expect in areas of low pressure?
Clouds, rainfall/precipitation
How is air pressure measured?
With a Barometer
This layer is where meteors burn up.
Mesosphere
Coriolis Effect
This type of radiation is felt as heat, but is not seen.
Infrared Radiation
What 3 events do scientists believe led to our current atmosphere?
1. Water condensed into the ocean
2. CO2 dissolved into the ocean
3. Photosynthesis produced oxygen
How many layers are there in the atmosphere?
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
This layer contains the Aurora Borealis
Thermosphere
What are the 3 major wind bands and where are they?
Draw a diagram.
Polar Cell (at the pole)
Ferrel Cell (between pole and equator)
Hadley Cell (over equator)
Radiation causes the _______________ __________ which warms the Earth.
Greenhouse Effect
How does the tilt of the Earth affect the seasons?
Tilted toward the Sun = Summer
Away from the Sun = Winter
Neither to or away = Fall/Spring