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Forces shaping the earth
Inside the Earth Three layers Core: center of the earth Inner core solid Outer core liquid
Mantle: layer of rock surrounding the core Solid near core Outer layer sometimes melts Magma: hot, melted rock that sometimes flows outward during volcanic eruptions
Crust: uppermost layer Includes ocean floors & continents
Forces beneath the earth’s crust Plate tectonics: theory that the earth’s crust consists of moving plates
When plates meet Can create high mountain ranges (the Himalayas)
Earthquake: violent and sudden movement of the earth’s crust
Tsunami: huge waves created by undersea earthquakes
Forces shaping landforms Weathering: the process of breaking surface rock into boulders, gravel, sand, and soil
Erosion: process of wearing away or moving weathered material Water, wind, ice Glaciers: giant slow-moving sheets of ice
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