1. Weathering and Erosion

2. Let’s play a game….. Class will be split into 2 teams. Pictures will show different types of weathering and erosion the first group with their hands up will get to ID the erosion / weathering type. –If a group says the answer without being called on they are disqualified for that round. Team with the most points wins….. –BRAGGING RIGHTS !!!!

3. What is the cause? Water Erosion : Cutting

4. What is the cause? Mechanical Weathering : Burrowing Animals

5. What is the cause? Chemical Weathering : Acid Rain

6. What is the cause? Water Erosion : Cutting

7. What is the cause? Wind E rosion

8. Water Erosion : Sheet Erosion ( Flooding )

9. What is the cause? Mechanical Weathering : Plant Growth

10. What is the cause? Mechanical Weathering : Pressure Release

11. What is the cause? Water Erosion : Splash Erosion

12. What is the cause? Example of destructive weathering. Chemical Weathering due to acid rain.

13. Objectives Define weathering and erosion in the classroom with 80% accuracy. Identify different types of weathering and erosion via pictures in the classroom with 80% accuracy.

14. Why? Why do we need to know about weathering and erosion? Why is it important to be able to recognize different types of weathering and erosion?

15. What? What is weathering and erosion? What are characteristics of weathering and erosion? What are the different types of weathering, and erosion?

16. Weathering The group of processes that change physical and chemical characteristics of rocks at or near Earth ’ s surface. –Mechanical Weathering –Chemical Weathering

17. Mechanical Weathering Physical disintegration ( breaking up ) of rock material ( but does not change composition ). Pressure release fracturing, plant growth, and burrowing animals.

18. Pressure Release Fracturing Sheet joints, and fracturing.

19. Plant Growth Growing roots widen fracture.

20. Burrowing Animals Animals nest / habitat can cause weathering due to creating holes in the surface.

21. Chemical Weathering Decompositio n of rock from exposure to water and atmospheric gases ( oxygen, water vapor and carbon dioxide ). –New chemical compounds ( minerals ) are formed.

22. Effects of Weathering Destruct ive Weatheri ng –Long slow process Limestone or marble grave stones. Construc tive Weatheri ng –Soil is a product of the weathering process.

23. Factors Affecting Weathering Availability of Water Chemical weathering is faster in humid climates Temperature Warmer Climates = faster weathering Polar Climates = Very slow weathering Temperate climates = Freeze - thaw physical weathering Slopes Gravity can break up rock

24. Erosion Physically picking up / removal of rock particles by water, ice, or wind.

25. Water Erosion Raindrop s ( splash erosion )

26. Water Erosion Heavy Rain ( sheet erosion ) flood.

27. Water Erosion Water cutting into banks making them higher and higher.

28. Wind Erosion In arid climates wind can pick up finer grained material s ( clay, silt, organic matter ).

29. Ice Erosion Glacial Drift

30. Review What is weathering and erosion? What are characteristics of weathering and erosion? What are the different types of weathering, and erosion?