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bends in layers of rock occuring when the moving plates squeeze the earth's surface until it buckles
the process that breaks down rocks (the two different types of weathering: chemical weathering and physical weathering
A periodic change in the pattern of ocean currents and water temperature in the mid-pacific region
area between the Tropic of Cancer and the Arctic Circle in the Northern Hemisphere and between the Tropic of Capricorn and Antarctic Circle in the Southern Hemisphere
a narrow piece of land that connects two large land masses and separates two bodies of water
Per capita income
is often used as average income, a measure of the wealth of the population of a nation, particularly in comparison to other nations
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