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Earth:
geology
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Earth's surface is 3/4 water
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Rocks are made up of minerals
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Minerals are (combinations
of) elements
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Types of rocks
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Igneous -- cooled magma/lava
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Sedimentary -- old lake/sea
bottom
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Metamorphic -- squished
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Use seismic waves (earthquakes)
to study earth's layered structure
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Inner core (solid iron)
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Outer core (liquid iron)
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Mantle (solid jacket)
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Crust (solid lighter elements
than iron)
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Upper mantle is plastic (magma)
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Convection in upper mantle
causes plates of crust to move
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Plate tectonics causes earthquakes
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Volcanos appear along plate
boundaries and in select hot spots (like Hawaii)
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