Question

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.	◯	◯	◯

Explanation:

Step1: Analyze Gas Exchange

Gas exchange (like \( \text{CO}_2 \) dissolving in water or releasing from water) involves carbon moving between atmosphere and hydrosphere. So mark the first row, Gas exchange column.

Step2: Analyze Chemical Weathering

Chemical weathering: Atmospheric \( \text{CO}_2 \) reacts with geosphere (rocks), then runoff carries carbon to hydrosphere. So mark the second row, Chemical weathering column.

Step3: Analyze Limestone Formation

Limestone formation: Carbon from hydrosphere (via biosphere, e.g., organisms) becomes part of geosphere (limestone). So mark the third row, Limestone formation column.

Answer:

Process Description	Chemical weathering	Gas exchange	Limestone formation
Carbon from atmosphere - geosphere - hydrosphere (runoff)	✔️
Carbon from hydrosphere - biosphere - geosphere			✔️