1. Moving Rock Weathering & Erosion

2. Weathering  Processes that change the characteristics of rocks on the Earth’s surface  Must occur BEFORE erosion can happen  No movement is involved  Occurs when rocks are exposed to water, air or plants

3. Mechanical Weathering  BREAKS rocks into different shapes and smaller sizes  Jagged rocks usually become smooth

4. Abrasion  Breaking, grinding, wearing away of rock  Caused by wind and water http://richmond.k12.va.us/schools/thirtee nacres/images/rockpic5.jpg

5. Frost Action or Ice Wedging  Freezing water in cracks expands and breaks rocks http://www.bearmountainzoo.org/es12.jpg

6. Plate Movement  The moving and sliding of tectonic plates wear away rocks as they slide past each other http://piru.alexandria.ucsb.edu/~tierne y/trs0demo/trs-0_files/geosystems12- 08%5B1%5D.jpg

7. Exfoliation / Temperature Change  Warming and cooling of rock causes top layers to break off in sheets http://uregina.ca/~sauchyn/geog323/279.j pg

8. Close to Home – Enchanted Rock http://www.answers.com http://geology.uprm.edu/Morelock/ima ges/965ERdome.jpg

9. Plants and Animals  Wedging of roots and burrowing of animals wears away rock http://www.geol.lsu.edu/Faculty/Ferrell/clas s/ClarkCreek/weathering_img2.gif

10. Close to Home – Texas Hill Country http://www.texasep.org/cpft/lugc.html

11. Chemical Weathering  Process by which rocks are decomposed, dissolved or loosened by chemical processes to form sediment

12. http://academic.brooklyn.cuny.edu/geology/leveson/co re/topics/weathering/picture_gallery/display/graphics/y orkshire_72.gif

13. http://cse.cosm.sc.edu/erth_sci/Soil/ss12_2.jpg

14. http://www.geol.lsu.edu/Faculty/Ferrell/class/ClarkCreek/weatheri ng_img3.gif

15. Erosion  The removal of weathered rocks by the action of: –Water –Wind –Ice –Gravity

16. Water Erosion http://www.greenpeace.org/raw/image_full/russ ia/en/photosvideos/photos/trees-can-stop- water-erosion

17. Close to Home – Canyon Lake http://www.cceo.org/gorgesite/index. htm After the Flood

19. Close to Home – Beach Erosion Three feet a year in some places! http://tamusystem.tamu.edu/systemwide/06/01/photos/erosion.jpg

20. Wind Erosion http://www.helsinki.fi/~jhyvonen/PB/M/wind%20erosion%202- pp.JPG

21. http://www.uwsp.edu/geo/faculty/ritter/geog101/te xtbook/images/lithosphere/eolian/wind_erosion_ New_Mexico_p0772931600_NRCS.jpg

22. http://www.ram.org/pictures/sights/oahu_san_diego/cabrillo_e rosion_1.gif

23. Ice Erosion http://www.swisseduc.ch/stromboli/etna/etna00/etna0002phot ovideo/icons/f20.jpg

24. http://www.sciencedaily.com/images/200 5/12/051211220547.jpg http://chandi.smugmug.com/photos/2 6411520-L.jpg

25. Gravity http://www.mariposacounty.org/fire/images/images%20200 6/web%20140%20rock%20slide%207-4-06%20004.jpg

26. http://people.hofstra.edu/ faculty/j_b_bennington/n y_geology/adirondacks/a dirondacks- Images/10.jpg