crust – rocky surface of the earth mantle – a thick layer of rock above the outer core outer...
TRANSCRIPT
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Earth’s Physical Processes
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Crust – Rocky surface of the earthMantle – A thick layer of rock above the
Outer coreOuter Core – Molten lavaInner Core – Very hot metal that is dense and
solid
Layers of the earth
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Physical Processes: forces which shape Earth’s land forms.
Internal (under the surface): Volcanoes, movement of the crust
External (above the surface): Weathering, Erosion
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Changes inside the Earth
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Plate Tectonics: earth’s crust broken into moving plates
Continental Drift Theory: all continents were once a single land mass “Pangaea”
As plates move = earthquakes and volcanoes occur
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Pangaea
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VolcanoesEarthquakesIslandsMountains are createdTsunamis
When plates move what occurs on Earth’s surface?
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Changes above the surface
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WEATHERING
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Mechanical Weathering: physically breaks down large pieces of rockExamples: water freezing inside rock,
seeds and roots
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Chemical Weathering: changing rock’s chemical make-upExamples: acid created by water + carbon dioxide or air
pollution (acid rain)
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EROSION
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Moving water: cuts into rock/wears it awayWind: carries soil away/deposits it elsewhereGlaciers: carry dirt, rocks, and boulders – wears land away
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What it does
Examples
Mechanical
Chemical
Movingwater
Wind Glaciers
Weathering Erosion