Changing state

The video tutorial explains the states of matter: solid, liquid, and gas. It describes how matter can change states through heating or cooling. Solids melt into liquids when heated, and liquids evaporate into gases. The process of evaporation can occur even at temperatures below boiling point. Practical examples, such as a snowman melting, are used to illustrate these concepts.

What is the state of a material?

How can matter be changed from one state to another?

What happens to the molecules of a solid when it is heated?

At what temperature does liquid water turn into steam?

Why do puddles not last forever?