Question

which of the following is an example of chemical weathering that breaks down rocks into sediment to be used in the formation of new rocks? a. frost wedging that breaks rocks through the expansion of water b. acid rain that begins to dissolve limestone c. erosion that moves sediment from one location to another d. tree roots that break through layers of rock

Explanation:

Chemical weathering involves changing the chemical composition of rocks via reactions. Frost wedging (A) and tree root growth (D) are physical weathering (mechanical breakdown). Option C describes erosion, not weathering. Acid rain reacts with limestone chemically to dissolve it, fitting chemical weathering.

Answer:

B. acid rain that begins to dissolve limestone