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Book 9, Question 74 · Video

Why Does Bread Sing When It Cools?

Video · 1:48 · Crafty Clover explains, from A Million Whys Book 9

Fresh bread can sing when it cools because the crust crackles as it changes! The crackling sounds like a tiny song. Bakers listen for it as a sign of a good bake.

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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. Why does bread sing when it cools?

The Big Idea

Fresh bread can sing when it cools because the crust crackles as it changes! The crackling sounds like a tiny song. Bakers listen for it as a sign of a good bake.

Hot Crust

Step one: the crust gets dry and hot. In the oven, the outside of the loaf dries out and turns crisp and brown. The inside stays soft, moist, and full of steam, because the heat has not reached all the water.

Cooling Shrinks

Step two: cooling makes things shrink. As the loaf cools, the crust contracts and the moisture inside moves toward it. The crust is stiff, so it cannot stretch easily.

Tiny Cracks

Step three: tiny cracks make sound. The crust forms many tiny cracks, and each one gives a small click or crackle. Together, they make the soft crackling song.

A Closer Look

Let's take a closer look at bread! A fresh loaf is warm and steamy inside. As it cools, the crust shrinks a little. Tiny cracks open up in the crust. And they make a crackle you can hear.

Quick Facts

Quick facts! Bakers call this crackling bread singing. Cooling on a rack lets air reach all sides of the loaf. Letting bread cool also helps the inside finish setting. Fresh loaves are hot, so a grown-up should handle them.

Think Like a Scientist

Now, think like a scientist! When a grown-up sets a fresh loaf on a rack, stay back and listen. Lean in a hand's width away, not closer. Can you hear the crackle? Hot bread is for grown-ups to move.

Outro

Cooling has a soundtrack. 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