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scienc/chpt 15 - voc

science chpt 15 - vocab

QuestionAnswer
weather The condition of Earth's atmosphere at a particular time and place
atmosphere The envelope of gases that surrounds.
water vapor Water in the form of a gas.
ozone A form of oxygen that has 3 oxygen atoms in each molecule instead of the usual 2.
density The amount of mass of a substance in a given volume.
pressure The force exerted on a surface divided by the total area ove which the force is exerted
air pressure The pressure caused by the weight of a column of air pushing down on an area.
barometer An instrument used to measure changes in air pressure.
mercury barometer An instrument that measures changes in air pressure, consisting of a gass tube partially filled with mercury, with its open end resting in a dish of mercury.
aneroid barometer An instrument that measures changes in air pressure without using a liquid.
altitude Elevation above sea level.
troposphere The lowest layer of Earth's atmosphere.
mesosphere The layer of Earth's atmosphere immediatly above the stratosphere.
ionosphere The lower part of the thermosphere.
stratosphere The second-lowest layer of Earth's atmosphere
thermosphere The outermost layer of Earth's atomosphere.
exosphere The outer layer of the thermosphere.
pollutants A harmful substance in the air, water or soil
photochemical smog A brownish haze that is a mixture of ozone and other chemicals, formed when pollutants react with each other in the presence of sunlight.
acid rain Rain that contains more acid than normal.
Created by: dellisposthaste
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