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Book 16, Question 90 · Video

How Does the Sandfish Lizard Swim Through Sand?

Video · 1:52 · Crafty Clover explains, from A Million Whys Book 16

The sandfish lizard swims through sand by wiggling its smooth body like a fish! Its legs tuck against its sides, and its scales are very smooth. Underneath the sand, it stays cool

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How does the sandfish lizard swim through sand?

The Big Idea

The sandfish lizard swims through sand by wiggling its smooth body like a fish! Its legs tuck against its sides, and its scales are very smooth. Underneath the sand, it stays cool and hidden from hungry birds and snakes.

Shovel Snout

Step one: dive in. The sandfish is a small African lizard with a shovel-shaped snout. It dives into loose sand head first, and in a blink it has vanished from view.

Smooth Scales

Step two: smooth scales. It wiggles its body like a fish, with its legs tucked against its sides. Its very smooth scales reduce friction, so it glides.

Cool and Hidden

Step three: cool and hidden. Under the surface, it is cooler and hidden from enemies. Scientists have even built robots that copy its wiggle, to learn how to move through sand.

A Closer Look

Let's take a closer look! The sandfish is small and sleek. Smooth scales slip through sand. Its wiggle looks like swimming. And robots now copy that wiggle.

Quick Facts

Quick facts! Sand moves around a sandfish a bit like water does around a fish. Its nostrils and eyes are built to keep sand out. Scientists study it to design better digging robots. Never dig alone in hot sand, and wear a hat when you play outside.

Think Like a Scientist

Now, think like a scientist! Push a smooth spoon and a rough spoon through a bowl of dry sand or rice. Which slides more easily? Smooth surfaces slip better, like the sandfish's scales! Share what you discover with a grown-up.

Outro

The sandfish swims through sand. Science is amazing! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

Why I wrote this