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earth science
about the earth
10
Science
8th Grade
11/10/2006

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Term
weather
Definition
the condition of earth's atomosphere patictular time and place.
Term
atmosphere
Definition
the mixtur of gases that surrounds earth.
Term
ozone
Definition
a form of oxygen that has three oxygen that has three oxygen atoms in each molecule insted of the usual two.
Term
water vapor
Definition
the invisable , gaseous form of water.
Term
pollutant
Definition
harmful substances in the air, water, or soil.
Term
photochemical smog
Definition
a brownish haze that is a mixture of ozone and other chemical, forms when nitrogen oxides, hydrocarbans, and other pollutants react with one another in the presence of sunsight.
Term
acid rain
Definition
rain that is more acidic than normal.
Term
density
Definition
the amount of mass in a given space.
Term
barometer
Definition
an insturment used to measure cahnges in air pressure.
Term
mercury borameter
Definition
an inturment that measueres air pressure.
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