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Physical Science

Physical Science. Interior of the Earth. Earthquake And Volcano Map. Earthquake Information. http://www.earthquake.gov/eqcenter/ http://www.earthquake.gov/eqcenter/ http://earthobservatory.nasa.gov/NaturalHazards/category.php?cat_id=12.

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Physical Science

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  1. Physical Science Interior of the Earth

  2. Earthquake And Volcano Map

  3. Earthquake Information http://www.earthquake.gov/eqcenter/ http://www.earthquake.gov/eqcenter/ http://earthobservatory.nasa.gov/NaturalHazards/category.php?cat_id=12

  4. We understand the components of our earth by looking at Seismic wave – waves traveling through the earth From Yahoo Images

  5. Seismic Waves • Body Waves – travel through the earths interior • Surface Waves – travel on the earths surface From Yahoo Images

  6. Body Waves Primary waves (p wave) longitudinal type waves travel in all directions from source move faster than s waves Secondary waves (s wave) Transverse type wave Similar to waves produced from a violin string Cannot propagate through liquid

  7. Surface wave • Rayleigh waves – move in an up and down motion • Love waves – move in a side to side motion

  8. S Waves Do Not Travel Through Liquids From Yahoo Images

  9. Waves Through the Earth

  10. Waves Through the Earth

  11. The core • Inner core – composed of Iron and nickel solid • Outer core – liquid iron and nickel – the flow of these metals produces the magnetic field From Yahoo Images

  12. The mantle Composed of hot iron rich silicate rocks

  13. Upper mantle • Asthenoshphere – lower portion plastic like properties • Lithosphere – floats on the asthenoshpere and includes the crust

  14. Continental crust is less dense than ocean crust – floats

  15. Continental drift Pangaea – having all the continents together as on land mass

  16. Evidences for such a theory • Mountain chain similarities • Identical rock compositions • Similar fossil findings • Climatic data – ice sheets • Change of the earths magnetism

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