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What happens to rock when acid reacts with it?

Which of the timelines above accurately represents the order of historical events in canadian history? a. one (1) b. two (2) c. three (3) d. four (4)

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.