13. How does temperature weather rocks?
A. Rocks are heated and cooled continuously.
B. Rocks are cooled tremendously all the time.
C. Rocks are heated greatly all the time.
D. Rocks are at different temperatures.
14. Which of the following activities of humans contribute to the weathering in
rocks?
A. clearing of forests
C. fishing
B. farming
D. deforestation
15. How do plants serve as agents of weathering?
A. Falling of leaves cause rocks to break.
B. Decaying trunks of plants cause the rocks to break.
C. Roots of plants that grow in rocks and cause them to break.
D. Branches of plants cause the rocks to break when blown by the wind.​