Question

a piece of limestone erodes due to acid rain. this process can be best described as a
slow chemical change.
rapid chemical change.
slow physical change.
rapid physical change.

Explanation:

Limestone erosion by acid rain involves a chemical reaction (e.g., calcium carbonate in limestone reacting with acids like sulfuric or nitric acid in acid rain). Such reactions typically occur over an extended period, so it is a slow process. A chemical change results in the formation of new substances (e.g., calcium sulfate, carbon dioxide, and water in the case of limestone - acid rain reaction), while a physical change would not involve a change in chemical composition.

Answer:

slow chemical change.