Question

which one is not a type of physical weathering?
acid rain
heating
cooling
collision of rock pieces

Explanation:

Physical weathering involves mechanical processes that break down rocks without changing their chemical composition. Heating, cooling, and collision of rock pieces are physical - process examples. Acid rain is a form of chemical weathering as it involves chemical reactions between acidic substances in the rain and the minerals in rocks.

Answer:

A. Acid Rain