1. Deep Earth - What is below our feet and how do we know? Intro to the deep earth What is your image of the deep earth What do we know about the deep earth How do scientists know about the deep earth P-wave /Spirograph Exercise Crossword puzzle Rethink your image of the deep earth

2. So what does the deep earth look like? Take out a piece of paper and draw your image of the interior of the earth.

3. What do we know about the interior of the earth ? Layers How Deep have we drilled Temperature differences Volcanoes Earthquakes Dynamic not static Solid and liquid

4. Kola Penninsula Deepbore Hole 1972 – 1994 12,262 Meters Exploration of earths crust by USSR Layers of the earth

5. 60 90125160195230 270310350395440 490540590645700 2.50 1.0 fast slow VPVP Temperature variation with depth( km)

6. Volcanoes and Earthquakes

7. The earth is a dynamic sphere of solid and liquid movement

8. How do scientists know about the deep earth Take out a piece of paper and your spirograph.

9. Seismic Waves/Tomography Deep Earth USArray Tutorial USArray Haiti Earthquake Body Waves P-waveP-wave / compressional S-waveS-wave / shear Surface waves) Love Waves Rayleigh Waves Michigan Tech UPSeis Now take out the slinky and lets reproduce these seismic waves

11. USArray

12. Teachable Moments