3.  http://www.youtube.com/watch?v=R48zYr-S7v0  Before watching the video write these questions down.  What is weathering? How does this happen?  What is erosion? How does this happen?  Based on what you now know: How did the Santa Elena Canyon form? Explain.

4. Listen to the teacher for instructions. Please use the paper towel to prevent mess.

5.  Weathering  Mechanical Weathering  Frost Wedging  Chemical Weathering  Oxidation  Erosion  Deposition WORDDefinition Your Definition Picture

6.  Let’s make a book!

7.  Examples of weathering  With your table partner, discuss what is going on in these pictures. What is happening?

8.  The type of weathering in which rocks and minerals break down into smaller pieces.  Physical Weathering  Factors  Temperature  Pressure

9.  On page 164  What property of water leads to the weathering of rocks? Explain (Think about states of matter)  What is frost wedging?

10.  Read page 165  Give two examples of how pressure can help in the weathering process.

11.  What is the difference between mechanical (physical) weathering and chemical weathering?  Agents:  Water  Oxygen  Carbon dioxide  Acid precipitation

12.  Water  Good solvent  Oxygen  Oxidation  Iron can combine with atm O2 (form new minerals)  Carbon Dioxide  Weak acid precipitation (CO2 + H2O)  Dissolves certain rocks  Acid Precipitation  SO2, CO2, NO’s (Combine with O and H2O)  <5.6 on pH scale  Burning fuels

13.  Happens very slowly  Effects  Climate  Composition  Surface area  Topography

14.  Temperature, precipitation, evaporation (Chemical)  Cool Climates (physical)  With your shoulder partner  Why does cool climates not aid in chemical reactions? ▪ Think states of matter.

15.  Different materials break down at different rates.  Put a piece of paper out in a rain storm  Put a piece of wood out in a rain storm  Hardness

16.  Increase in surface leads to an increase in chemical weathering.  Smaller pieces = faster

17.  What is topography?  Level ground = Less weathering  Slopes = More weathering.

18.  Paragraph form: At least ½ page  You will get extra credit for having more than ½ page. Use the four steps to writing.  Explain how climate, composition, surface area, and topography speed up or slow down weathering.

19.  Explain how the rate of reaction speeds up and slows down when it comes to weathering.  MAKE SURE YOU USE EXAMPLES AND EXPLAIN