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19 Cards in this Set

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Atmosphere
A mixture of gases that surrounds the Earth
Air Pressure
Measure of the force with which the air molecules push on a surface
Altitude
Is the height of an object above the Earth’s surface
Troposphere
Next to the Earth’s surface- lowest layer of the atmosphere. Also is the densest- contains 90% of the atmosphere’s total mass.
Stratosphere
The air is very thin. The ozone layer is in this layer.
Ozone
Made up of 3 oxygen molecules. This layer absorbs solar energy in the form of ultraviolet radiation, warming the air.
Mesosphere
Is the coldest layer of the atmosphere.
Thermosphere
The uppermost layer of the atmosphere.
Radiation
The transfer of energy as electromagnetic waves.
Conduction
Is the transfer of thermal energy from one material to another by direct contact
Convection
The transfer of thermal energy by the circulation or movement of a liquid or gas.
Wind
Moving air
Coriolis Effect
Curving of moving objects such as wind, by the Earth’s rotation
Trade Winds
Winds blow from 30o latitude to the equator

Early traders used the trade winds to sail from Europe to the Americas
Westerlies
Wind belts found in Northern and Southern Hemispheres between 30 and 60 latitude.

The winds flow toward the poles and in the opposite direction of the Trade Winds
Polar Easterlies
Wind belts that extend from the poles to 60 latitude in both hemispheres- formed from cold, sinking air moving from the poles
Jet Streams
Narrow belts of high-speed winds that blow in the upper troposphere and lower stratosphere. They do not follow regular patterns around the Earth.
30 north and 30 south latitude, sinking air creates an area of high pressure. The winds are weak
Horse Latitudes
Doldrums
The trade winds meet in an area of low pressure around the equator. There is very little wind.