What is lake turnover?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. What is lake turnover?

The Big Idea

In fall, a lake mixes from top to bottom! It's called turnover. What happens?

Cooling Down

Step one: Cooling Down. In fall, the surface cools until it is as cold and heavy as the water below. Then the layers can finally mix.

Wind Stirs

Step two: Wind Stirs. Wind stirs the lake like a giant spoon. The layers mix from top to bottom, bringing oxygen down and nutrients up.

Spring Too

Step three: Spring Too. A similar mixing happens in spring after the ice melts. Lakes that mix twice a year are called dimictic lakes, and turnover helps feed the plants and animals.

A Closer Look

Let's take a closer look! Surface cools. Stirs it. Goes down. Come up.

Quick Facts

Quick facts! Turnover is like a lake taking a deep breath, and it helps feed the plants and animals in the lake. Wind stirs the lake. Spring mixing too. Twice a year is dimictic.

Think Like a Scientist

Now, think like a scientist! Make layers of warm and cold water in a glass. Gently stir with a straw. Watch the layers. What happens to them? How is that like the wind?

Outro

In fall, the lake's surface cools until it's as heavy as the water below, and wind stirs everything from top to bottom, bringing oxygen down and nutrients up. A similar mixing happens in spring, like the lake taking a deep breath. Science is amazing! Keep wondering and keep exploring! Share what you learned with someone at home, and see what they think! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!