Carbon in the ocean onginates from the atmosphere.
t or d?

The process call photosynthesis by tiny marine plants converts carbon into organic matter.

Explanation:

Carbon dioxide from the atmosphere dissolves in the surface waters of the ocean.

Explanation:

Photosynthesis by tiny marine plants (phytoplankton) in the sunlit surface waters turns the carbon into organic matter.

Respiration from aquatic life lowers the carbon dioxide concentration in the oceans. Carbon dioxide dissolves more readily in water than in the atmosphere. Plankton at the surface funnel carbon from the atmosphere to the ocean.

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.