Journey to the Center of the Earth

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Journey to the Center of the Earth

• By _____________
• Sample Presentation

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Three Main Parts

• The Crust
• The Mantle
• The Core

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Outer Layer Surface and Crust

• The Earths surface is mostly water, basalt, and
  granite.
• The part of the crust under the surface is
  mostly silicon, aluminum, calcium, sodium and
  potassium
• The crust is between 5 and 10 km thick under the
  oceans and between 35 and 70 km on the
  continents.

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The Mantle

• The entire mantle is about 2,900 km thick.
• The upper mantle is rigid.
• The lower mantle flows very slowly like melted
  plastic.
• The mantle is made of silicon, oxygen, magnesium,
  iron, aluminum, and calcium.
• The top of the upper mantle is about 1,600 F.
  At the bottom it is about 6,700 F.

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The Core

• The core is very hot and dense
• The liquid outer core is made of nickel and iron
  alloy, and is about 2300 km thick.
• The solid inner core is mostly iron, and is about
  1200 km thick.
• The temperature of the inner core may be over
  13,000 F., which is hotter than the surface of
  the sun.

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Bibliography

• The Southern California Integrated GPS Education
  Module http//scign.jpl.nasa.gov/learn/plate1.htm
• Enchanted Learning http//www.enchantedlearning.co
  m/subjects/astronomy/planets/earth/Inside.shtml