Question

how does water temperature affect dissolved oxygen levels?
higher temperatures causes oxygen to solidify.
higher temperature causes oxygen to liquefy.
temperature has no effect on dissolved oxygen.
higher temperatures decrease dissolved oxygen.

Explanation:

According to the principles of solubility in chemistry, the solubility of gases (such as oxygen) in liquids (such as water) generally decreases with increasing temperature. This is because higher - temperature water has more kinetic energy, which makes it more difficult for gas molecules to stay dissolved. The first option is incorrect because oxygen does not solidify in water at normal environmental temperatures relevant to this context. The second option is wrong as liquefaction of oxygen in water is not a relevant process for dissolved oxygen levels in the context of water temperature changes in natural or typical aquatic systems. The third option is false as temperature does affect dissolved oxygen levels.

Answer:

Higher temperatures decrease dissolved oxygen.