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The Earth’s Interior

This text delves into the Earth's interior structure, exploring its various layers, including the crust, mantle, and core. We learn about the oceanic and continental crusts, their differences in density and thickness, and the composition of the mantle with its upper and plastic layers. The lithosphere and asthenosphere are defined, highlighting their solid and plastic characteristics. Additionally, the text discusses the outer and inner core, their metallic composition, and how temperature increases towards the center. Evidence of these processes, like radioactive decay and heated materials, is also examined.

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The Earth’s Interior

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  1. The Earth’s Interior Glencoe Ch. 12-3 Pages 370-372

  2. A look inside the Earth

  3. Earth’sCross-section

  4. Layers of the Earth • Crust –________________ and __________________ layer  2 types of crust

  5. Layers of the Earth 1. Oceanic crust – under ______________, 4-7 km thick (high density) 2. _____________________ crust – under continents, ___-____ km (lighter in density)

  6. Earth’sCross-section

  7. Layers of the Earth - Mantle – _____________ km thick - rock - Upper mantle – ________________ rock (closer to surface) - ________________ mantle – plastic rock (___________ magma)

  8. Layers of the Earth Lithosphere – _____ and solid upper mantle  solid and rocky • Asthenosphere – soft and plastic __________mantle _______, _______, ________ rock and magma

  9. Layers of the Earth

  10. Layers of the Earth - _______________ – the innermost / center of the Earth - thought to be made of ___________ and ______________ 1. Outer core – _______________ metal 2. Inner core – _______________ metal

  11. Earth’sCross-section

  12. Layers of the Earth - As you go toward the Earth’s core the temperature steadily ______________ - Evidence – 1. Radioactive decay of unstable _______ 2. Heated liquid rock in mantle 3. Heated solid and liquid metal in core heat is radiated outward toward the surface

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