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NC 7th Atmosphere

7th grade Key vocabulary about the atmosphere

TermDefinition
Atmosphere the envelope of gases surrounding the earth or another planet.
Troposphere the lowest region of the atmosphere, extending from the earth's surface to a height of about 3.7–6.2 miles (6–10 km), where most of the weather occurs, temperature decreases with altitude
Stratosphere : the part of the earth's atmosphere which extends from the troposphere to about 30 miles (50 kilometers) above the surface and in which temperature increases gradually to about 32° F (0° C) and clouds rarely form, where the ozone layer is located
Mesosphere the atmospheric layer lying between the stratosphere and the thermosphere, characterized by a rapid decrease in temperature with height, where meteors burn up
Thermosphere the region of the atmosphere above the mesosphere and below the height at which the atmosphere ceases to have the properties of a continuous medium. The thermosphere is characterized throughout by an increase in temperature with height
Exosphere The outermost layer of the earth's atmosphere, lying above the thermosphere and extending thousands of kilometers into space, from which molecules having sufficient velocity can escape the earth's gravitation.
Ionosphere the layer of the earth's atmosphere that contains a high concentration of ions and free electrons and is able to reflect radio wave
Altitude the height of an object or point in relation to sea level or ground level
Air pressure the force per unit of area exerted on the Earth's surface by the weight of the air above the surface
Created by: clupton
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