What is crust?

The crust is the outside layer of something, like the skin on a cookie or the shell around an egg.

Imagine you have a big, warm chocolate chip cookie. If you bite into it, the first thing you taste is the crunchy part, that's the crust! Just like how cookies have a crusty outside, the Earth has a crust too. It’s the top layer of our planet, and we live on it.

If you touch a cold glass of water, the outside feels cool, that's like the crust of the glass. The inside is still warm, just like how Earth's crust is thin compared to what’s deep inside the planet.

The crust can be made of rocks and soil, or even ice in places like Antarctica. It's not all smooth, it has mountains, valleys, and even little bumps we call hills!

So next time you eat a cookie or touch something cold, remember: you're experiencing what the crust feels like!