Question

limestone is mostly made of sediment and the fossilized remains of ancient marine organisms. exoskeletons mix with sediment to form carbon - rich rock in a process called limestone formation. carbon can be stored in limestone for millions of years! match each term to its description. chemical weathering limestone formation gas exchange during this process, carbon dioxide dissolves into ocean water and forms carbonic acid, which breaks down into simple ions. this process can also happen in reverse. during this process, the fossilized remains of marine organisms mix with sediment to produce a type of carbon - rich rock. during this process, rocks on land are broken down by carbonic acid, forming various ions. carbon is removed from the atmosphere.

Explanation:

1. When carbon - dioxide dissolves in ocean water to form carbonic acid which breaks into simple ions (and can happen in reverse), this is gas exchange as it involves the movement of gases (carbon - dioxide) between the atmosphere and the ocean.
2. The process where fossilized remains of marine organisms mix with sediment to produce carbon - rich rock is limestone formation as described in the text.
3. The process where rocks on land are broken down by carbonic acid forming various ions and carbon is removed from the atmosphere is chemical weathering since it involves chemical reactions breaking down rocks.

Answer:

1. gas exchange: During this process, carbon dioxide dissolves into ocean water and forms carbonic acid, which breaks down into simple ions. This process can also happen in reverse.
2. limestone formation: During this process, the fossilized remains of marine organisms mix with sediment to produce a type of carbon - rich rock.
3. chemical weathering: During this process, rocks on land are broken down by carbonic acid, forming various ions. Carbon is removed from the atmosphere.