1. April 22, 2011 Nina Lin

2. Taiwan Pasadena 1999, Mw 7.6 2001 summer 2007

3. Weathering The breakdown of Earth’s surface materials into smaller pieces in the same place.... (SLOWLY!!!) -Physical Weathering -Chemical Weathering

4. Physical Weathering Process by which rocks are broken down into smaller pieces by external conditions.

5. Q : What causes this fracture? A. ice B. the foot in the picture C. aliens

6. Ice Wedging

7. A. rodents B. plants C. human beings Q : What causes the soil wedge in the rocks (if not ice)?

8. Plant Roots

9. A. farmersB. electric drills C. animals Q : What causes the holes in the soil?

10. Burrowing of Animals

11. Chemical Weathering The process that breaks down rock through chemical changes.

12. Q: What causes a sinkhole? A. the houses nearby B. the trees nearby C. water D. human beings

13. Water slowly dissolves rock... Limestone + Water  “Karst” features!

14. Water slowly dissolves rock... Sinkholes is the most disastrous Karst feature!

15. A. Sleeping B. Meeting friends C. Destroying the rock D. Learning Chinese Q: What is the lichen doing on the rock?

16. Living Organisms Lichens that grow on rocks produce weak acids that chemically weather rock (SLOWLY!!)

17. Summary for Weathering

18. Erosion The breakdown of the materials of Earth’s crust into smaller pieces and transport of the materials.... (FAST!!!)

19. Q: How is the V-shaped valley formed? A. water B. The hills open up by themselves C. human beings

20. River Erosion

21. When there’re more water than rocks… River Erosion

22. When there’re more rocks than water… River Erosion

23. Q: How is the U-shaped valley formed? B. snow/ice C. The hills open up by themselves A. human beings

24. Glacier the river of snow/ice!

25. Glacier flows 30-60 feet/day!!!

26. - leaves scratches, or even pluck boulders! Glacier

27. A. bees B. ants C. wind D. human fingers Q: What causes the holes in the rock?

28. Wind eats out the soft part, and leave the strong part of the rock!! Wind Erosion

29. An extreme type of wind erosion: Sand storm! Persian Gulf Wind Erosion

30. A. grass on the surface B. houses below the landslide C. worms in the soil D. the weight of the rocks and soils Q: What causes the landslide?

31. Landslide The erosional process that causes most damages to human beings!

32. A. a big earthquake happened B. a big tsunami hit C. a big storm came with big waves D. all of the above Q: What may have happened to the house?

33. Coastal Erosion

34. Summary for Erosional Processes

35. Game Time!!!