1. Physical Science Interior of the Earth

2. Earthquake And Volcano Map

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

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

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

7. 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

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

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

10. Waves Through the Earth

13. 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

14. The mantle Composed of hot iron rich silicate rocks

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

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

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

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