3. It is a physical wearing away of rocks.
a. Chemical weathering c. both chemical and mechanical
b. Mechanical weathering
d. none of the above
B. Mechanical weathing
Mechanical weathering, also called physical weathering and disaggregation, causes rocks to crumble. Water, in either liquid or solid form, is often a key agent of mechanical weathering. … When ice melts, liquid water performs the act of erosion by carrying away the tiny rock fragments lost in the split.