1. Which of the following factors causes the breaking down of rocks?

a. man and animals

b. plants

pieces?

a. erosion

b. landslide

rocks?

c. temperature d. all of these

2. What refers to the process of breaking down of rocks into smaller

c. tsunami

d. weathering

3. Which of the following situations contributes to the breaking down of

a. heavy rains

b. Intensive waves

c. high temperature

d. all of these

4. Which of the following human activities may contribute to the breaking

down of rocks?

a. cutting down of trees

b. landscaping

c. mining d. planting trees

5. How do animals breakdown rocks?

a. animals step on the rocks c. acid from dead animals weaken rocks

b. use of their hooves and homs d. all of the above

6. Which of the following is a good effect of soil erosion?

a. clogging of irrigations c. deposition of mine tailing b. decrease of food production d. shaping of landforms

7. Heavy rain was experienced last night. When Ernesto woke up this morning, he noticed that there was mud in their front yard. What agent of erosion

caused this?

a. animals

b. human

c. water

d. wind​