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27 Cards in this Set
- Front
- Back
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water in the form of a gas
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water vapor
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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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ozone
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_____ and _____ together make up 99 percent of dry air
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oxygen
nitrogen |
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Earth's atomosphere is made up of _______,_______,_____ ______,______ ______, and many other gases, as well as particles of liquids and solids
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nitrogen
oxygen carbon dioxide water vapor |
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the condition of Earth's atomosphere at a particular time and place
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weather
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the layer of gases that surrounds the planet
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atmosphere
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earth's ________ makes conditions on Earth suitable for living things
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atmosphere
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most oxygen molecules have _____ oxygen atoms
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2
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contains only gases
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pure air
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harmful substances in the air, water, or soil
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pollutants
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most air pollution is the result of
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burning fossil fuels
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the brown haze that forms in cities
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photochemical smog
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rain that contains more acid than normal
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acid rain
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forms when nitrogen oxides and sulfur oxides combine with water in the air to form nitric acid and sulfur acid
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acid rain
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density=
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mass
____ volume |
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the amount of mass in a given volume of air
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density
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3 properties of air
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mass
density pressure |
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the force pusing on an area or surface
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pressure
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the result of the weight of a column of air pushing down on an area
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air pressure
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an instrument that is is used to measure changes in air pressure
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barometer
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2 types of barometers
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mercury
aneroid |
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consists of a glass tube open at the bottom end and partially filled with mercury
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mercury barometer
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has an airtight metal chamber-is sensitive to changes in air pressure
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aneroid barometer
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name some units of air pressure
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inches of mercury
millibars |
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elevation
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altitude
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air pressure ______ as altitude increases
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decreases
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as ____ _____ decreases, so does density
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air pressure
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