III. MULTIPLE CHOICE. Choose the letter of the correct answer.
11. Weathering causes the formation of
A Clouds B. minerals C. soil D. weather
12. Some tiny plants are growing on rocks in the garden. What will happen
after a long time The rocks will
A. grow bigger
C. weaken and break
B. become harder
D. gather more minerals
13. Which of the following human activities contribute to erosiona
A. kicking of rocks
B. throwing dynamites in quarry sites
C. Using of jackhammer in construction
D all of the above
14. Which of the following tends to cause physical or mechanical
weathering
A. animals that burrow in the ground
B. root of plants growing into the cracks in the ground
C. Water that seeps into the pores and cracks of rocks
D. All of these
15. What will happen to a rock when it is exposed to higher temperature
A. contracts B. evaporate C. expands D. nothing​