1. Pop Quiz! 1.__ 2.__ 3.__ 4.__ 5.__ 6.__ 7.__ 8.__ Inner Core Mantle Mesosphere Outer Core Asthenosphere Ocean Crust Lithosphere Continental Crust

2. Pop Quiz! 1.__ 2.__ 3.__ 4.__ 5.__ 6.__ 7.__ 8.__ Inner Core Outer Core Mantle Mesosphere Asthenosphere Lithosph. Ocean Crust Continental Crust

3. 1. Convection transfer of heat through large scale fluid flow. flow caused by density differences due to temperature differences 3 Types of heat transfer

4. 2. Conduction Transfer of heat by direct contact 3 Types of heat transfer

5. 3. Radiation Transfer of heat through electromagnetic waves 3 Types of heat transfer

6. Deep Earth

7. Plate Tectonics - Driving Forces Convection Slab Pull Ridge Push Short Story: heat trying to escape

8. Plate Tectonics - Driving Forces Convection Slab Pull Ridge Push Short Story: heat trying to escape

9. Seismic Tomography Warm, less dense Cold, more dense

10. Is the mantle a liquid? Doesn’t convection happen in fluids? Mantle is like silly putty: Short term: acts like solid Long term: has some behavior like liquids

11. The Core Liquid outer core found using seismology: no S-waves travel in liquids

12. Convection in Fluid Outer Core produces Earth’s magnetic field

13. Deep Earth Summary: Composition Mantle: Outer Core: “Rocky” (Silicates) density: 3-6 g/cm 3 Mostly Iron density: 10-12 g/cm 3 Inner Core: Mostly Iron density: 13 g/cm 3 density: 2-3 g/cm 3 Crust:

14. Deep Earth Summary: Heat Flow Mantle: Outer Core: Convection Convection & Conduction Inner Core: Conduction