15 terms

VOCABULARY #15

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atmosphere
a mixture of gases that surrounds a planet or moon
air pressure
the measure of the force with which air molecules push on a surface
greenhouse effect
the warming of the surface and lower atmosphere of Earth that occurs when carbon dioxide, water vapor, and other gases in the air absorb and reradiate infrared radiation
global warming
a gradual increase in average global temperature
wind
the horizontal movement of air from an area of high pressure to an area of lower pressure
jet stream
a narrow belt of strong winds that blow in the upper troposphere
weather
the short-term state of the atmosphere, including temperature, humidity, precipitation, wind, and visibility
humidity
the amount of water vapor in the air
relative humidity
the ratio of the amount of water vapor in the air to the maximum amount of water vapor the air can hold at a set temperature
condensation
the change of state from a gas to a liquid
precipitation
Any form of water that falls from clouds and reaches Earth's surface.
thunder
a booming or crashing noise caused by air expanding along the path of a bolt of lightning
lightning
A sudden spark, or energy discharge, caused when electrical charges jump between parts of a cloud, between nearby clouds, or between a cloud and the ground.
hail
precipitation of ice pellets when there are strong rising air currents
snow
precipitation falling from clouds in the form of ice crystals
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