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Weather and Climate
chapter 1
21
Science
8th Grade
12/04/2008

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Cards

Term
acid rain
Definition
rain that contains more acid than normal
Term
air pressure
Definition
force that is the result of the weight of a column of air pushing down an area
Term
altitude
Definition
elevation above sea level
Term
aneroid barometer
Definition
an instrument that measures changes in air pressure without using liquid
Term
atmosphere
Definition
the layer of gases that surrounds earth
Term
aurora borealis
Definition
a colorful glowing display in the sky caused when particles from the sun strike oxygen and nitrogen atoms in the ionosphere
Term
barometer
Definition
an instrument used to measure changes in air pressure
Term
density
Definition
the amount of mass of a substance to a given volume
Term
exosphere
Definition
the outer layer of the thermosphere, extending outward onto space
Term
ionosphere
Definition
the lower part of the thermosphere, where electrically charged particles called ions are found
Term
mercury thermometer
Definition
an instrument that measures changes in air pressure, consisting of a glass tube partially filled with mercury, with its opened end resting on a dish of mercury
Term
mesosphere
Definition
the middle layer of earths' atmosphere; the layer in which most meteoroids burn up
Term
ozone
Definition
form of oxygen that has three oxygen atoms in each molecules instead of two
Term
photochemical smog
Definition
a brownish haze that is a mixture of ozone and other chemicals, formed when nitrogen oxides, hydrocarbons, and other pollutants react with each other in the presence of sunlight
Term
pollutant
Definition
harmful substances in the air, water or soil
Term
pressure
Definition
the force pushing on the area or surface
Term
stratosphere
Definition
the second-lowest layer of the earth's atmosphere; the ozone layer is located in this layer
Term
thermosphere
Definition
the outermost layer of the earth's atmosphere
Term
troposphere
Definition
the lowest layer of the earth's atmosphere
Term
water vapor
Definition
water in the form of gas
Term
weather
Definition
the condition of earth's atmosphere at a particular time and place
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