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15 terms

The atmosphere

Earth Science
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atmosphere
The mixture of gases which surrounds a planet.
troposphere
The closest layer of gasses to the Earth's surface; 0-16 km above Earth's surface; this is the weather occurs, it contains most atmospheric water vapor; temperature and pressure decreases with increasing altitude.
stratosphere
The second closest layer of atmosphere; extends from about 16 to 50 km up; location of ozone layer; absorbs ~97% of Ultraviolet radiation; temperature increases with increasing altitude.
mesosphere
The third closest later of the atmosphere to Earth; extends from 50 to 80 km above the Earth, most meteorites burn up in this layer; temperature decreases with increasing altitude.
thermosphere
The fourth layer of the atmosphere; extends from 80 to 500 km; this is where the auroras form; temperature increases with increasing altitude.
exosphere
The outermost atmospheric layer; 500km+ above the Earth's surface; composed of the lightest gasses; satellites orbit here; temperature increases with altitude; lowest air pressure
ionosphere
Layer of electrically charged particles located in the thermosphere and mesosphere; absorbs harmful solar energy including X-rays and gamma rays.
ozone
Is a gassed formed by three atoms of oxygen (O3). The ozone layer is found in the stratosphere. It is the ozone layer which filters the UV radiation from the Sun.
radiation
(a) Energy transmitted by electromagnetic waves such as energy from the sun. (b) The particles given off by radioactive atoms such as uranium.
conduction
Form of heat transfer where heat energy is directly transferred between molecules through molecular collisions or direct contact.
convection
Process involving a liquid or gas being heated, the warmer part of the mass will rise and the cooler portions will sink.
greenhouse effect
Natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases
greenhouse gasses
Gasses such as carbon dioxide, methane and water vapor that trap heat in the Earth's atmosphere and affect Earth's climate.
global warming
Gradual warming of the earth and its atmosphere that may be caused in part by pollution and an increase in the greenhouse effect.
aurora borealis
A colorful, glowing display in the sky caused when particles from the sun strike oxygen and nitrogen atoms in the ionosphere; also called the Northern Lights.