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Chapter 15 Key Terms

Across
The outermost layer of Earth's atmosphere
Has an airtight metal chamber
The state of the atmosphere at a place and time
The layer of the atmosphere that we live in
The distance above sea level
The brown haze that develops in sunny cities
A toxic gas formed from oxygen by electrical discharges
Harmful substances in the air, water, or soil
Water in the form of gas
The lower layer of the thermosphere
The force pushing on an area or surface
Down
Consists of a glass tube open at the bottom end and partially filled with mercury
The amount of mass in a given volume of air
Extends from the top of the troposphere to about 50 km above Earth's surface
The result of the weight of a column of air pushing down on an area
The envelope of gases surrounding the Earth or another plant
Rain that contains more acid than normal
Begins 50 km above Earth's surface and ends at an altitude of 80 km
The outer portion of the thermosphere
An instrument that is used to measure air pressure