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The Atmosphere
Chapter 15
13
Science
8th Grade
11/10/2006

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Term
Weather
Definition
the condition of earths atmosphere at a particluar time and place
Term
Atmosphere
Definition
the layer of gases that surrounds the planet
Term
Ozone
Definition
a form of oxygen that has three oxygen atoms in each molecule instead of the usual two
Term
Water Vapor
Definition
water in the form of gas
Term
Pollutants
Definition
harmful substances in the air , water , or soil
Term
Photochemical Smog
Definition
the brown haze that forms in cities
Term
Temperture Inversion
Definition
a layer of warm air prevents the rising air from escaping
Term
Acid Rain
Definition
rain that contains more acid than normal
Term
Pressure
Definition
the force pushing on an area of surface
Term
Air Pressure
Definition
the result of the weight of a column of air pushing down on an area
Term
Mercury Barometer
Definition
consists of a glass tube open at the bottom and partially filled with mercury
Term
Aneroid Barometer
Definition
an airtight metal chamber
Term
Altitude
Definition
elevation is the distance above sea level
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