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part 1 of study guide


the condition of the atmosphere in one place during a limited period of time


the term for the weather patterns that an area experiences over a long period of time


an imaginary line running from the North Pole to the South Pole through the planet's center


the measure of how hot or cold a place is


trip around the sun


equal night

Tropical of Cancer

northernmost latitude 23½° N


marks the beginning of summer in the Northern Hemisphere

Tropic of Capricorn

southernmost latitude 23½° S

Greenhouse effect

traps the sun's energy for growing plants even in cold weather

Global warming

believed to be caused by human activities (such as burning of coil, oil, and natural)

Low latitudes

between 30° S and 30° N latitude

High latitudes

60° N to 90° N and from 60° S to 90° S

Arctic circle

latitude 66½° N

Antarctic circle

latitude 66½° S


between 30° N and 60° N in the Northern Hemisphere and between 30° S and 60° S in the Southern Hemisphere

Prevailing winds

global winds blow in fairly constant patterns

Coriolis effect

causes prevailing winds to blow diagonally rather than along

strict north

south or east-west directions


global winds that are diverted north and south, leaving a narrow, generally windless band

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