Name: ____________________________________ Date: ____________________________ Block: _______
12.5 What are Mass Movements and Erosion?
Lesson Review
Part A: Answer the following using your notes and/or pages 268-270 in your text.
1. What is erosion? ______________________________________________________________
2. What force cause mass movements? _________________________________________________
3. What protects bedrock from weathering? _____________________________________________
4. What is talus and where can you find it? ______________________________________________
5. What kind of mass movement is a lahar? How do they occur? ________________________________
____________________________________________________________________________
6. Name two examples of slow mass erosion. ____________________________________________
7. Name two examples of fast mass erosion. _____________________________________________
Part B: Match each term in Column B with its description in Column A
Column A
Column B
________ 1. The rapid movement of water that contains large amounts
of suspended clay and silt.
A. Rockfall
________ 2. When gravity pulls down mostly dry rock.
B. creep
C. slump
________ 3. A mass of weathered material that has been saturated with
water flows downhill.
D. earthflow
________ 4. A slow imperceptible movement of soil down-slope.
E. mudflow
________ 5. When blocks of land tilt & slide down along a curved surface.
Skill Challenge: Answer the following.
1. Explain two reasons why the state of California is susceptible to landsides:
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________