What is the primary difference between mechanical weathering and chemical weathering?
A) Mechanical weathering involves physical processes, while chemical weathering involves chemical reactions.
B) Mechanical weathering occurs only in cold climates, while chemical weathering occurs in warm climates.
C) Mechanical weathering affects only rocks, while chemical weathering affects both rocks and minerals.
D) Mechanical weathering occurs on the Earth's surface, while chemical weathering occurs deep underground.