What Causes the ‘Crack’ of a Breaking Eggshell?

The crack you hear when an eggshell breaks is caused by tiny spaces inside the shell that pop open like a mini explosion.

Eggshells look smooth, but they are actually made of lots of tiny, connected parts, kind of like a net or a honeycomb. These little parts fit together tightly to make the shell strong.

When you drop an egg or press on it, the shell gets squished from all sides. The tiny parts inside start to pull apart, and when one of them finally breaks free, snap!, that’s where the crack comes from. It's like when you break a piece of chocolate, there's a little pop sound because something was holding together before it let go.

The crack isn’t just from one tiny part breaking, it’s from all the tiny parts inside the shell moving and making noise. That’s why the crack sounds like a small, quick pop. It’s like when you break a cookie in half, you can hear that little snap too!