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The Atmosphere

TermDefinition
weather The condition of Earth's atmosphere at a particular time and place.
water vapor Water in the form of a gas.
atmosphere The envelope of gases that surrounds Earth.
density The ratio of the mass of a substance to its volume (mass divided by volume).
air pressure The pressure caused by the weight of a column of air pushing down on an area.
barometer An instrument used to measure changes in air pressure.
mercury barometer An instrument that measures changes in air pressure, consisting of a glass tube partially filled with mercury, with its open end resting in a dish of mercury.
aneroid barometer An instrument that measures changes in air pressure without using a liquid.
altitude Elevation above sea level.
troposphere The lowest layer of Earth's atmosphere.
stratosphere The second-lowest layer of Earth's atmosphere.
mesosphere The layer of Earth's atmosphere immediately above the stratosphere.
thermosphere The outmost layer of Earth's atmosphere.
ionosphere the lower part of the thermosphere.
exosphere The outer layer of the thermosphere.
electromagnetic waves A wave that can transfer electric and magnetic energy through the vacuum of space.
radiation The transfer of energy by electromagnetic waves.
infrared radiation Electromagnetic waves with wavelengths that are longer than visible light but shorter than microwaves.
ultraviolet radiation Electromagnetic waves with wavelengths that are shorter than visible light but longer than X-rays.
scattering Reflection of light in all directions.
greenhouse effect The trapping of heat near a planet's surface by certain gases in the planet's atmosphere.
Created by: abuddana
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