Which of the following statements regarding turnover in a lake is the most accurate?
A) In fall turnover, dense water at 4°C sinks and disturbs sediments in the benthic zone.
B) In fall turnover, dense water at 4°C rises and disturbs sediments in the benthic zone.
C) The surface water gets to 4°C only by cooling.
D) Fall turnovers and spring turnovers are exactly the same.

Question

Quizplus · Accepted Answer

In fall turnover, the surface water cools down, becomes denser, and sinks when it reaches approximately 4°C, which is the temperature at which water is most dense. This process helps to mix the water layers, including disturbing sediments in the benthic zone.

Which of the Following Statements Regarding Turnover in a Lake