Thorough mixing of oxygen and nutrients within a lake occurs in ____.

Question

Quizplus · Accepted Answer

In spring and autumn, the temperature of the surface water cools, causing it to sink, while the lower water rises to replace it. This process is called turnover or mixing, and it helps distribute oxygen and nutrients throughout the entire lake. During winter, the surface water freezes, preventing mixing, and during summer, the surface water heats up, creating a stable layer that prevents mixing. Therefore, the only correct option is D, spring and autumn.

Thorough Mixing of Oxygen and Nutrients Within a Lake Occurs