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25 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 a gas
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density
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the amount of mass of a substance in a a given volume
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pressure
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the force exerted on a surface divided by the total area over which the force is exerted
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barometer
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an instrument used to measure changes in air pressure
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mercury barometer
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an instrument that measures changes in air pressure, consisting of a glass tube partially filled with mercury, with its open end resting in a dish of mercury
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aneroid barometer
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an instrument that measures changes in air pressure without using a liquid
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altitude
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elevation above sea level
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troposphere
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the lowest layer of Earth's atmosphere
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stratosphere
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the second-lowest layer of Earth's atmosphere
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mesosphere
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the layer of Earth's atmosphere immediately above the stratosphere
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thermosphere
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the outermost layer of Earth's atmosphere
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ionosphere
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the lower part of the thermosphere
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exosphere
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the outer layer of the thermosphere
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pollutant
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a harmful substance in the air, water, or soil
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photochemical smog
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a brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence of sunlight
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acid rain
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rain that contains more acid than normal
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air pressure
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caused by the weight of a column of air pushing down on an area
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exosphere
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the outer layer of the thermosphere
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pollutant
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a harmful substance in the air, water, or soil
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photochemical smog
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a brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence of sunlight
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acid rain
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rain that contains more acid than normal
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air pressure
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caused by the weight of a column of air pushing down on an area
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