A crack is like when you have a cookie and it breaks into two pieces. The cookie is still there, but now it’s in parts. Sometimes, when you step on a twig in the park, it makes a loud sound and splits into pieces. That’s because it cracked! Imagine a puzzle. When all the pieces are together, it looks like one big picture. But if you pull one piece away, you can see a line where they separate. That line is like a crack.

Another way to think about a crack is to picture a drawing on a piece of paper. If you fold the paper, you might see a line where it bent. That’s a bit like a crack, too. It’s a line that shows where something has changed or broken.

When you look at a sidewalk, you might see lines running through the concrete. Those are cracks, kind of like the lines on a map. They show where the ground has moved a little bit. Cracks are just lines or spaces that appear when something is not all in one piece anymore.