1. Earth typical (and not!) terrestrial planet Agenda:  Core  Geology  Atmosphere

2. How much of the mass of the solar system is contained within the Sun? A. 63% B. 25% C. 75% D. 99% E. Cannot conclude

3. Home, sweet home

4. Terrestrial planets Differentiated core/crust  Geological activity? Atmosphere Few moons

5. Differentiation metals Silicates, oxides Granite, Basalt, quartz

6. Geologic activity is driven by internal heat

7. More Hawaiian islands are being built right now!

8. The crust is made of plates These plates move around! Wikipedia

9. Plates can pull apart

10. Pulling apart

11. Plates can jam under one another

12. Pushing together – caused 2004 tsunami

13. 2004 Tsunami

14. Plates can slide parallel

15. San Andreas fault Moving parallel

16. Earth’s crust is 10-20 miles thick. Have we drilled through it? A. Yes B. No C. Cannot conclude

17. The atmosphere

18. Absorbs ultraviolet Absorbs x-rays Height (Km)

19. Greenhouse effect Atmosphere as blanket

22. CO 2 concentrations and temperature

23. Evidence for global warming Retreat of glaciers (worldwide) Severe drought (worldwide) Increased surface temperature Melting of polar ice caps  (rising of sea levels) Consensus in peer-reviewed journal articles

24. Retreating glaciers

26. Katrina

27. Work of Katrina

28. Polar ice caps are melting polar ice cap movie 1979-2005

29. Polar ice caps are melting 1979-2005 (NASA)

30. It’s not the Sun’s fault...at least not mainly.

31. Summary Earth is differentiated Geologically active Atmosphere plays many roles Global warming is occurring

32. Team activity #15 Mapping the solar system from Earth