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Earth&Sun Inv. 3

Earth's Atmosphere

TermDefinition
air a mixture of invisible gas that fills space everywhere on Earth
atmosphere the layers of gases surrounding the Earth
compressed forced into a smaller space
pressure the push when compressed air comes back
troposphere the layer of the atmosphere closest to the Earth's surface; all the weather happens in it
stratosphere the region of the atmosphere above the troposphere; contains ozone
mesosphere the region in the atmosphere above the stratosphere where meteors burn up
thermosphere the region of the atmosphere above the mesosphere
exosphere layer of the atmosphere above the thermosphere; the transition from the atmosphere into space
ozone a form of oxygen in the stratosphere that soaks up harmful rays of the sun
weather the condition of the air around us
forecast a prediction of what kind of weather to expect
weather variables the data that scientists measure about the weather
hygrometer a weather instrument that measures humidity
wind vane a weather instrument that measures wind direction
humidity the amount of water vapor in the air
air pressure the force exerted on the Earth by a mass of air
anemometer a weather instrument that measures wind speed
barometer a weather instrument that measures air pressure
thermometer a weather instrument that measures temperature
cloud a large accumulation of tiny water droplets in the air
cloud recipe warm rising air, dust, water vapor
front line the boundary between two bodies of air with different characteristics
cold front formed when a mass of cold air advances and pushes away warmer air
warm front formed when warm air advances and pushes away colder air
stationary front two air masses meet and neither moves out of the way
high pressure air that is falling, cooler, and contracts
low pressure air that is warmer, rising, and expanding
isobars lines drawn on a weather map to connect areas of the same pressure
meteorologist the scientists who study the weather
meteorology the science of weather
gases in air oxygen21% and nitrogen 78%
cirrus high, thin, wispy clouds made of ice crystals
cumulus puffy clouds in the middle of the sky
stratus long, layered clouds that are lower in the sky
Created by: Amy Burson
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