Question

limestone is mostly made of sediment and the fossilized remains of ancient marine organisms. shells and exoskeletons. when these organisms die, their mineralized parts sink to the ocean floor and become fossilized. over time, fossilized shells and 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! how does carbon move during each process? match each process to its best description. gas exchange chemical weathering limestone formation carbon moves from the atmosphere to the hydrosphere or from the hydrosphere to the atmosphere. carbon that has moved from the hydrosphere to the biosphere moves on to the geosphere. carbon from the atmosphere interacts with the geosphere and then moves to the hydrosphere via runoff.

Explanation:

Gas - exchange involves the movement of carbon between the atmosphere and hydrosphere. Chemical weathering is when carbon from the atmosphere interacts with the geosphere and then moves to the hydrosphere via runoff. Limestone formation is the process where carbon that has moved from the hydrosphere to the biosphere moves on to the geosphere as fossilized remains mix with sediment to form carbon - rich rock.

Answer:

gas exchange: Carbon moves from the atmosphere to the hydrosphere or from the hydrosphere to the atmosphere.
chemical weathering: Carbon from the atmosphere interacts with the geosphere and then moves to the hydrosphere via runoff.
limestone formation: Carbon that has moved from the hydrosphere to the biosphere moves on to the geosphere.