Question

how does upwelling generally affect the dissolving of gases in ocean water?
a. cooler water decreases the amount of gas dissolved.

b. cooler water increases the amount of gas dissolved.

c. warmer water increases the amount of gas dissolved.

Explanation:

Upwelling brings cooler, nutrient - rich water from the deep ocean to the surface. The solubility of gases in water generally increases as temperature decreases. So cooler water (from upwelling) can hold more dissolved gas. Option A says cooler water decreases gas dissolved (incorrect). Option C says warmer water increases gas dissolved (incorrect, as warmer water holds less gas). Option B states cooler water increases the amount of gas dissolved, which matches the relationship between temperature and gas solubility in water and the effect of upwelling.

Answer:

B. Cooler water increases the amount of gas dissolved.