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Science Chapter 11: Weather and the Water Cycle Vocabulary atmosphere (p. 395). The blanket of air surrounding Earth (p. 398). troposphere (p. 395). The layer of air closest to Earth’s surface (p. 398). air pressure (p. 395). The weight of the atmosphere pressing down on Earth (p. 399). local winds (p. 395). Movements of air that result from local changes in temperatures (p. 401). prevailing winds (p. 395). Global winds that blow constantly from the same direction (p. 402). water cycle (p. 405). The process in which water continuously moves from Earth’s surface into the atmosphere and back again (p. 408). evaporation (p. 405). The process of a liquid changing into a gas (p. 409). condensation (p. 405). The process of a gas changing into a liquid (p. 409). humidity (p. 405). A measurement of the amount of water vapor in the air (p. 410). precipitation (p. 405). Water that falls from the air to Earth (p. 410). air mass (p. 415). A large body of air that has the same temperature and humidity throughout (p. 420). front (p. 415). The border where two air masses meet (p. 421). climate (p. 415). The pattern of weather an area experiences over a long period of time (p. 422).
