6. When can you say that the wind is an agent of soil erosion?
A. When it presses down rocks.
B When it stops picking up rocks.
C. When it breaks rocks into pieces
D. When it blows rock pieces to other places.
7. Landslides on mountain slopes show the force of
A Gravity B. Wind C. Runoff
D. Running water
8. What makes the water muddy after a heavy rain?
A. The pebbles picked up by water.
B. The soil and sand are mixed with water and carried by it.
C. The goddess of rain makes muddy rain fall on the
ground
D. None of the above
9. Which of the following shows that soil erosion is caused by
animals?
A. The occurrence of the storm.
B. The dog is digging the soil.
C. The roots of plants are growing.
D. The construction workers are building a housing project.
10. All of these are causes of soil erosion EXCEPT:
A Water
B. People C. Sun D. Wind​