Which statements describe physical weathering? Select all that apply.
A. Two rocks hit against each other in a fast-flowing stream and break apart.
B. Oxygen and water change the compostion of the minerals in a rock
C. Small rocks are pushed together when a mole digs an underground den
D. Mosses grow on a rock and produce acids that wear away the rock over time.
A and D because weathering is the process of a rock breaking and wearing down over time. b doesnt apply, because that is changing of the chemical structure, not the physical, and c is just movement of rocks, not breaking of rocks.
