Question

identify each example of chemical weathering

Explanation:

Chemical weathering occurs when rocks are broken down by chemical reactions. In the case of the cave formation (top - picture), acidic water reacts with limestone (calcium carbonate) over time. Carbon dioxide in the air dissolves in rainwater to form carbonic acid. This acid reacts with limestone to form soluble calcium bicarbonate, which is carried away by water, leading to the formation of caves, stalactites, and stalagmites. For the rock with holes (bottom - picture), oxidation can be a form of chemical weathering. If the rock contains iron - rich minerals, oxygen in the air can react with the iron, causing it to rust and break down, creating holes in the rock.

Answer:

Both the cave formation and the rock with holes are examples of chemical weathering. The cave is formed through the reaction of acidic water with limestone, and the holes in the rock may be due to oxidation of iron - rich minerals.