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20 Cards in this Set
- Front
- Back
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weather
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the condition of earth's atmosphere at a particular time and place.
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atmosphere
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the envelope of gases that surrounds earth.
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ozone
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a form of oxygen that has three oxygen atoms in each molecule instead of the usual two.
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water vapor
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water in the form of gas.
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density
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the amount of mass of a substance in a given volume.
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pressure
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the amount of force pushing on and area.
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air pressure
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is the result fo the weight of a column of air pushing down on an area.
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barometer
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an instrument that is used to measure air pressure.
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mercury barometer
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consists of a glass tube open at the bottom end and partially filled with mercury.
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aneroid barometer
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an airtight metal chamber.
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altitude
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is the distance above sea level, the average level of the surface of the oceans.
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troposphere
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means "turning" or "changing."
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stratosphere
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extends from the top of the troposphere to about 15 kilometers above earth's surface.
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mesosphere
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means "middle," so mesosphere is the middle layer of the atmosphere.
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thermosphere
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extends from 80 kilometers above earth's surface outward into space.
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ionosphere
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is the lower layer 80 kilometers above the surface and extends to 400 kilometers.
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exosphere
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is the outer portion of the thermosphere.
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pollutant
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are harmful substances in the air, water,or soil.
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photochemical smog
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brown haze that develops in suny cities, photo in photochemical means "light."
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acid rain
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is natrually slightly acidic, but rain that contains more acid than normal.
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