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Journey
to the Center of the Earth
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In hot protoplanet Earth,
heavy stuff like iron (Fe) sank
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Lighter stuff like silicon,
aluminum and oxygen (Feldspar) floated
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Earthquake studies reveal
layered structure of Earth's core
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waves from earthquakes (seismic
waves) travel through the earth!
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like refraction of light
in glass, these waves bend at sharp material boundaries
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allow mapping of inner layers
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we can't go there but seismic
waves can
Types of waves from earthquakes
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