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Chapter 1 (new book)

The Atmosphere

Weather The condition of Earth's atmosphere at a particular tim and place
Atmosphere The envelope of gases that surrounds he planet
Ozone A form of oxygen that has three molecules instead of two
Water Vapor Water in the form of gas
Density Th amount of mass in a given volume of air
Pressure The force pushing on an area or surface
Air Pressure The result of the weight of the column of air pushing down on an area
Barometer An instrument used to measure air
Mercury Barometer Has a glass tube open at the bottom and is partially filled with mercury . If the mercury rises it means there is high air pressure, if it sinks it means there is low air pressure
Aneroid Barometer Has an airtight metal chamber that is sensitive to changes in air pressure. when the air pressure increases the dial moves one way, if decreases dial moves the other way
Altitude/Elevation The distance above sea level
Troposphere The lowest layer of the atmosphere. Conditions in the troposphere are more variable then in the other layers
Stratosphere Extends from the top of the troposphere to about 50 km above earth's surface. The stratosphere contains the ozone layer
Created by: bastet1245