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October 2, 2012

October 2, 2012. Warm Up: Finish coloring and homework comics. Turn in Homework to the bin.  . Today:. We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust .

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October 2, 2012

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  1. October 2, 2012 Warm Up: Finish coloring and homework comics. Turn in Homework to the bin. 

  2. Today: • We will explain the changes on Earth’s surface and be able to determine how rocks provide valuable information about Earth’s crust. • You will work with a partner to describe, explain and identify various examples of how Earth’s surface changes through natural and chemical processes.

  3. The Basics… • WEATHERING: The breakdown of rocks • MECHANICAL weathering = the natural and physical breakdown of rock • CHEMICAL weathering = the breakdown of rock by chemical reactions • Acid precipitation

  4. MECHANICAL WEATHERING • Erosion: Movement of sediment by wind, water, glaciers and gravity • WATER! Major agent of erosion • Rivers • Oceans • Freeze/Thaw: water freezes and expands, thaws and rocks break apart • Plants: roots may grow into tiny cracks in rocks and exert force, breaking the rock

  5. Test It… • You will see a series of pictures. • One partner will look at the picture and describe it to his/her partner. • The partner will write down what Earth process they believe is represented by the picture. *NOT giving answers here! • IE: erosion by water; chemical weathering; etc… • Then, partners switch positions. Repeat! • I will reward the partnership with the most correct answers!

  6. PARTNERS SWITCH!

  7. Were You Right?!

  8. EROSION BY WATER

  9. CHEMICAL WEATHERING

  10. EROSION BY WATER

  11. MECHANICAL BY FREEZE-THAW

  12. MECHANICAL BY PLANTS

  13. EROSION BY WIND

  14. EROSION BY WIND

  15. EROSION BY WATER

  16. EROSION BY WATER

  17. MEHCANICAL BY PLANTS

  18. CHEMICAL WEATHERING

  19. MEHCANICAL BY FREEZE-THAW

  20. Game • 3 teams of 7 • You will relay breaking down the landform (weathering), carry it across crab-style (erosion), deposit to make another landform (deposition) • First team finished wins!!

  21. Be prepared for a quiz on rocks and Weathering tomorrow!!

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