Question

a computer model predicts a rise in mean global temperature by 3.6°f. how will this affect the oceans?

increased ph of surface waters

sea levels will drop due to more evaporation.

increased thermal expansion of water

all of these are correct.

Explanation:

• When global temperature rises, seawater expands thermally (thermal expansion of water).
• Increased temperature does not increase the pH of surface waters (ocean acidification due to more CO₂ absorption actually lowers pH).
• Sea levels rise (not drop) due to thermal expansion and melting of ice - sheets, not just evaporation (evaporation is part of the water cycle and does not lead to a net drop in sea - level in the context of global warming).

Answer:

increased thermal expansion of water