During warmer parts of the day, fish will be found in deeper waters of a lake. Which statement best explains this phenomena with respect to the solubility of a gas?

Question

A.
Gases are more soluble at low pressures.

B.
Gases are more soluble at high pressures.

C.
Gases are more soluble at low temperatures.

D.
Gases are more soluble at high temperatures.

Answer 1

The correct statement that best explains the phenomenon of fish moving to deeper waters during warmer parts of the day is:

D. Gases are more soluble at high temperatures.

As temperatures rise, the solubility of oxygen in water (a crucial gas for fish) decreases. In warmer surface waters, oxygen levels can be lower, prompting fish to seek deeper, cooler waters where oxygen is more soluble.