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Chapter 15
things in chapter 15
22
Science
8th Grade
11/09/2006

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Term
weather
Definition
is condition of earth's atmosphere at a particular time and place
Term
atmosphere
Definition
is a layer of gases that surronds the planet.
Term
ozone
Definition
is a form of oxygen that had three oxygen in the air
Term
water vapor
Definition
is water in form of a gas
Term
pollutants
Definition
harmful substances in the air, ater, pr soil
Term
photochemical smog
Definition
thr brown haze that forms in cities
Term
temperature inversion
Definition
a layer of warm air prevents rising air from esaping.
Term
acid rain
Definition
rain is naturally slightly acidic, but rain that contains more acid then normal.
Term
density
Definition
the amount of mass in gaven space; mass per unit volume
Term
pressure
Definition
the amount of force pushing on a surface or area
Term
air perssure
Definition
a force that is the result of the weight of a column of air pushing down on an area
Term
barometer
Definition
a instrument used to measure changesin air pressure
Term
mercury barometer
Definition
consistz od glass tube open at the bottom end and partially filled with mercury.
Term
aneroid barometer
Definition
has a airtight chamber
Term
altitude
Definition
or elevation is distance above sea level the average level of the surface of the ocean
Term
troposphere
Definition
lowest layer of earth's atmosphere
Term
mesosphere
Definition
a drop in temperture markd the beginning of the next layer
Term
stratosphere
Definition
extends from the top of the troposphere
Term
thermosphere
Definition
the outermost layer of the atmoshere
Term
ionosphere
Definition
the lower layer of the thermosphere
Term
aurora bireails
Definition
the brillent light displays
Term
exosphere
Definition
is the other layer of the thermosphere
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