2. http://www.uni-mainz.de/FB/Geo/mineralogie/Earth_System_Cycles/whole%20earth.jpg

3. How did it get here????? Well, you remember how the Sun formed … The planets came about in the protostar stage. This is a protostar

4. Protostar The area surrounding the soon to be Sun was filled with planet forming material that revolved around This is known as the Accretion Disk

5. Cosmic Collisions Over time, the material slams together forming the planets.

6. The Planets What's the difference among the inner planets and the outer planets? Why do you think that is so?

7. The Layers of Earth

8. The Core 1/3 the mass of Earth Heat maintained by insulation of outer layers Powers all geologic activity

9. Inner Core Solid iron/nickel Pressure from above causes inner core to be solid

10. Outer Core “Liquid hot molten metal” Just outside of the inner core

11. Mantle 2/3 the mass of Earth Hot layer of rock under extreme pressure Insulates the core Transfers heat to crust for geologic activity

12. Upper Mantle Asthenosphere “weak layer” that can flow Rock and magma mix Behaves like putty Heat travels in convection cells Little Jack – Meet the Fockers GET IT

13. Convection As the hot mantle material rises, it cools and sinks back down. This rotation pulls the crust and causes it to move This image displays the movement

14. Upper Mantle Continued Lithosphere “Rock layer” floating on top Crust rides on top of this layer Brittle, cracks under stress Experiences earthquakes http://www.xenophilia.com/zb/zb0008/lithosphere.jpg

15. The Crust We live on it Mostly light elements Most abundant: Oxygen 62%, Silicon 21%, make up sand 17% Al, Fe, Ni, Mg, Na, Ca Rides on lithosphere

16. 3 types of crust Oceanic Thin young crust Ocean floor material Dense volcanic rocks Continental Thick, old crust Land mass Erosion made rocks