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4th.Science.Ch.11

STUDY
PLAY
atmosphere
a mixture of gases that surrounds the earth
nitrogen
a colorless, odorless gas found in the atmosphere and in all living tissues
troposphere
the lowest, densest layer of the atmosphere
stratosphere
the 2nd layer of the atmosphere and above the troposphere
ozone
the free atom form of oxygen
mesosphere
the middle layer of the atmosphere
thermosphere
the uppermost layer of the atmosphere
exosphere
the upper region of the thermosphere extending toward outer space