Question

limestone is mostly made of sediment and the fossilized remains of ancient marine organisms. 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! determine how carbon moves during each process. complete the table. chemical weathering gas exchange limestone formation carbon from the atmosphere interacts with the geosphere and then moves to the hydrosphere via runoff. carbon that has moved from the hydrosphere to the biosphere moves on to the geosphere. carbon moves from the atmosphere to the hydrosphere or from the hydrosphere to the atmosphere.

Explanation:

Step1: Analyze chemical weathering

Carbon from atmosphere - geosphere - hydrosphere movement is chemical weathering. So, for "Carbon from the atmosphere interacts with the geosphere and then moves to the hydrosphere via runoff", it is chemical weathering. Carbon that moves from hydrosphere - biosphere - geosphere is not typical chemical weathering.

Step2: Analyze gas exchange

Carbon moving between atmosphere and hydrosphere is gas - exchange. So, for "Carbon moves from the atmosphere to the hydrosphere or from the hydrosphere to the atmosphere", it is gas exchange.

Step3: Analyze limestone formation

Limestone formation involves fossilized remains mixing with sediment. The statement "Carbon that has moved from the hydrosphere to the biosphere moves on to the geosphere" can be related to the long - term process of carbon getting stored in geosphere as part of limestone formation. Also, fossilized shells and exoskeletons (which have carbon) mix with sediment to form limestone, so it is limestone formation.

Answer:

	Chemical weathering	Gas exchange	Limestone formation
Carbon that has moved from the hydrosphere to the biosphere moves on to the geosphere			X
Carbon moves from the atmosphere to the hydrosphere or from the hydrosphere to the atmosphere		X