  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.

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

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

 Let’s make a book!

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

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

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

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

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

 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

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

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

 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

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

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

 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.

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