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Ch 3 The Atmosphere

TermDefinition
Weather The condition of Earth's atmosphere at a particular time and place.
Atmosphere The envelope of gases that surround Earth.
Water Vapor Water in the form of a gas.
Density The ratio of the mass of a substance to its 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 Barometers An instrument that measure charges in air pressure, consisting of a glass tube partially filled with Mercury, with its open end resting in a dish of mercury.
Aneroid Barometer A 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 outermost 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 that visible light but shorter than microwaves.
Ultraviolet Radiation Electromagnetic waves with wavelengths that are shorter that visible light but longer that 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: aokete002
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