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Planet Earth Vocabulary List & Definitions



A prolonged period of time without rainfall.
equator The made up line around the earth that shows how far the North and South poles are.
erosion The gradual process of being eroded by natural forces.
mantle A specific area of the earth that falls between the core and the crust.
atmosphere The specific gas that surrounds the earth.
ocean Large areas of salt water that surround much of the earth's surface.
axis The central like the earth revolves around.
ozone A type of oxygen that is produced by electricity and is in the air, mostly after a thunderstorm.
revolution The act of rotating around a center or axis.
rotation The process of moving around a center or axis.
terrain Any area of land with specific natural features.
core The central portion of the earth which lies below the mantle.
crust The outer layer of the earth's surface.

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