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30 Cards in this Set
- Front
- Back
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air that surrounds our planet |
atmosphere |
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air particles pressing down on a surface |
air pressure |
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layer of atmosphere closest to earth |
troposphere |
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layer of atmosphere just above most weather |
stratosphere |
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four layers that make up earth's atmosphere |
thermosphere, stratosphere, mesosphere, troposphere |
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where does most weather occur? |
troposphere |
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how was earth's atmosphere first formed |
gases from erupting volcanoes |
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today gas particles in our atmosphere are mostly made of ___ |
nitrogen |
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one thing that helps keep earth warm |
carbon dioxide |
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which layer of atmosphere contains most ozone |
stratosphere |
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heat from the sun is trapped in the atmosphere to warm earth |
greenhouse effect |
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large body of air, has moisture content and temp similar to land or water over which it formed |
air mass |
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border formed where cold air mass and warm air mass meet |
front |
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thin, wispy clouds at high altitude |
cirrus |
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puffy, white clouds at middle altitudes |
cumulus |
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dark, towering clouds that bring heavy rain |
cumulonimbus |
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thick, gray clouds near earth's surface |
stratus |
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two properties used to describe air masses |
temperature and moisture |
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which of the following characteristics describe warm air |
forced upward by cooler air and exerts low pressure |
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cloud type that usually brings heavy rain |
cumulonimbus |
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most of the sun's energy |
never reaches earth |
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an air mass |
has similar properties to the land it formed over |
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a line with half circles represents |
a warm front |
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which are the highest altitude clouds |
cirrus |
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instrument that measures air pressure |
barometer |
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instrument that measures humidity |
hygrometer |
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amount of water vapor in air |
humidity |
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what does a rotating-drum barometer record |
changes in air pressure |
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long lines marked with triangles or half circles stand for? |
fronts |
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what does humidity mean |
amount of water vapor in the air |
