Question

question 1 (2 points)
what force causes mechanical weathering?
○ a growing plants and expanding ice
○ b carbonic acid and acid rain

Explanation:

Mechanical weathering breaks rock physically without changing its composition. Growing plant roots expand and pry rock apart, and water freezing/expanding in rock cracks splits rock—these are physical forces. Carbonic acid and acid rain cause chemical weathering by altering rock chemistry.

Answer:

a. Growing plants and Expanding ice