“EROSION” 

STUDENT ORGANIZER ANSWER KEY

1.	What is one factor which makes rocks more or less vulnerable to erosion? (Their softness or porosity.)

2.	The cause of erosion described here is rock broken apart by (Freezing water), which is a process of (Mechanical) weathering.. 

3.	In which environment would wind erosion be most pronounced? (circle one)

a.	Rain forest
b.	Desert
c.	Mountain range

4.	The erosion on the left is the result of what type of weathering? (Chemical.) 

5.	How does agriculture lead to increased erosion? (Vegetation—which helps hold soil in place-- is removed.) 

6.	In what way do the large rocks lining the riverbank protect it from erosion? (They are less likely to be washed away by the river’s current than the river’s usual soil banks.) 

7.	The sand fences on a beach are a defense against what type of erosion? (Wind.)