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What’s Inside ?

What’s Inside ?. The Earth’s Core – Almost as hot as the surface of the sun (due to radioactive decay) Escape of this inner heat drives geological activity on the planet. Inner Core Under immense pressure Solid metal mostly iron and nickel Very high density 13.5 g/ml. Outer Core

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What’s Inside ?

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  1. What’s Inside?

  2. The Earth’s Core – Almost as hot as the surface of the sun (due to radioactive decay) Escape of this inner heat drives geological activity on the planet. • Inner Core • Under immense pressure • Solid metal mostly iron and nickel • Very high density 13.5 g/ml • Outer Core • 2270 km thick • Liquid metal • Responsible for Earth’s magnetic field

  3. The Mantle • Lower mantle • Rocky layer • Most of earth’s volume • Upper Mantle • Hot weak rock that is easily deformed • 10% is molten • Consists of the asthenosphere, lithosphere and crust

  4. Asthenosphere: Capable of flow Lithosphere: rigid solid plates Oceanic Crust: 5-12 km thick, mostly basalt Continental Crust: 35 km thick, mostly granite, Oceanic crust is more dense than continental

  5. Temperature on the surface of the sun ~ 5700˚C

  6. How do we know about the earth’s inner structure? • Drilling only explores into the top 10-15 km of the crust • Seismic waves can probe 6400 km though

  7. Examine the paths of earthquake data (the epicenter marks the location of an earthquake) • State 3 things that you can tell by this diagram

  8. Try to label: Convergent boundary Divergent boundary (potential) Hawaii

  9. PLATE BOUNDARIES • 1. Convergent Boundary • Ocean – Continent • Ocean – Ocean • Continent – Continent Continent – Continent convergence Ocean – Continent Convergence

  10. PLATE BOUNDARIES • 1. Convergent Boundary • Ocean – Continent • Ocean – Ocean • Continent – Continent Continent – Continent convergence Ocean – Continent Convergence

  11. 2. Divergent Boundary 3. Transform Boundary

  12. Where type of boundary is pictured?

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