Why are some lakes so crystal clear?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. Why are some lakes so crystal clear?

The Big Idea

Some lakes are so clear you can see the bottom! Why are they crystal clear? Let's look closer.

Little Cloudiness

Step one: Little Cloudiness. Clear lakes have very little algae, mud, or dissolved stuff to cloud the water. So light can travel far down.

Deep and Cold

Step two: Deep and Cold. This usually happens in deep, cold lakes with rocky shores and few nutrients flowing in. Georgian Bay and parts of Lake Superior are like this.

Seeing Deep

Step three: Seeing Deep. Without lots of plant food, tiny algae stay scarce. In the cleanest lakes, you can see down more than ten meters.

A Closer Look

Let's take a closer look! Very few. Very little. Few nutrients. Travels far.

Quick Facts

Quick facts! Scientists measure water clarity with a white disk lowered on a rope. Cold, deep lakes. Rocky shores help. See ten meters down.

Think Like a Scientist

Now, think like a scientist! Fill one clear bottle with tap water. With a grown-up, fill another with puddle or pond water. Hold them up to the light. Look through each one. Which is clearer, and why?

Outro

Clear lakes have very little algae, mud, or dissolved material, which often happens in deep, cold lakes with rocky shores and few nutrients, like Georgian Bay. With little plant food, algae stay scarce, so you can see down more than ten meters. Science is amazing! The world is full of surprises. Keep asking big questions, and keep exploring with me! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!