That's correct! When a solid is heated up, it turns into a liquid. This process is called melting.

Here's a breakdown:

* Solid: Molecules in a solid are tightly packed and vibrate in fixed positions.

* Heating: Adding heat provides energy to the molecules, causing them to vibrate faster.

* Melting: When the molecules vibrate with enough energy, they overcome the forces holding them in a fixed position and start to move around more freely. This results in a change of state from solid to liquid.

Let me know if you want to learn more about the different states of matter!