1. Landscapes Day 4 Climate and Mass Movement

2. Do Now  1. The diagram shows the stump of a tree whose root grew into a small crack in bedrock and split the rock apart.  The action of the root splitting the bedrock is an example of what type of weathering? 

3. Do Now (Cont.)  2. Which agent of erosion was primarily responsible for forming the long, narrow, U- shaped valleys in the Finger Lakes region of New York State?  3. If you had two rock samples, one limestone and the other granite, which rock type would weather faster and why?

4. Aim, Learning Target & Agenda  AIM:  What is the effect of climate on weathering landscapes?  How can large amounts of land be eroded at the same time?  Learning Target:  I can describe how landscapes are altered by climate and mass movement.  Agenda:  Do Now  Lesson on Weathering (continued)  Project Assignment

5. Climate  How does climate differ from the weather?  Climate is the characteristic weather of a region over an extended period of time.  Climate influences  the TYPE of weathering and the RATE (speed) of weathering.

6. Climate  Arid (dry) regions do not experience much weathering.  Hot & humid (wet) regions experience more chemical weathering  Cold & humid (wet) regions experience more physical weathering

7. What causes valleys like this?

8. Glaciers  Create U-shaped valleys  Glaciers have rocks stuck in the ice along the sides and bottom of the glacier.  Depending on how hard the rocks are, they can scratch the bedrock that the glacier is passing over  These scratches are called striations

10. Glaciers  Glaciers also drop random large boulders places.

11. Mass Movements  DUE TO GRAVITY!  Usually weathering happens slowly and gradually.  Sometimes, it can happen rapidly in the form of mass movements  Ex: rockfalls and mudslides  Or, it can happen slowly overtime: soil creep, slump

12. Rock falls

14. Mud Flows (aka mudslides)

15. Soil Creep

16. Landslides  http://video.nationalgeographic.com/video/environment/en vironment-natural-disasters/landslides-and- more/landslides/ http://video.nationalgeographic.com/video/environment/en vironment-natural-disasters/landslides-and- more/landslides/