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27 Cards in this Set
- Front
- Back
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mass of stone or metal that has passed through the atmosphere and struck the earth's surface
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meteorite
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mass of stone or metal traveling through space
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meteoroid
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a molecule composed of three oxygen atoms; absorbs UV radiation
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ozone
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process by which plants use chlorophyll and energy from sunlight to manufacture food from carbon dioxide
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photosynthesis
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the process by which oxygen combines with food to release energy and carbon dioxide
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respiration
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living things depend on the atmosphere for:
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air to breathe, temperature steady, UV protection
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The earth has fewer meteorite impacts because_____.
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earth's atmosphere
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two main ingredients in air?
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nitrogen, oxygen
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the sub-layer of the thermosphere where the atmosphere blends into space
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exosphere
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electrically charged atom
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ion
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a sub-layer of the thermosphere containing ions
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ionosphere
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the layer of the atmosphere just above the stratosphere; burns up most meteors
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mesosphere
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a region in the upper stratosphere where ozone is concentrated
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ozonosphere
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layer of the atmosphere just above the troposphere where the temperature remains fairly constant
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stratosphere
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layer of the atmosphere above the mesosphere where temperatures are the highest in the atmosphere
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thermosphere
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layer of the atmosphere nearest the earth where most weather changes occur
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troposphere
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two examples of variable gases
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oxygen, water vapor
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stratosphere extends ______ miles
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30
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mesosphere is _____ miles
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50
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trace gases
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argon, neon, hydrogen
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Nitrogen and oxygen are _____ gases in the atmosphere.
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primary
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Carbon dioxide and water vapor are variable gases because _____.
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their amounts vary throughout the atmosphere
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flying mostly occurs in the ______
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stratosphere
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meteor showers happen in this sphere. It is also the coldest.
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mesosphere
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mt. everest is in the _______
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troposphere
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nasa launches in the ______
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exosphere
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hottest layers
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thermosphere
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