Solids, liquids and gases are called the three states of matter. Liquids can flow or be poured easily. They are not easy to hold. Liquids change their shape depending on the container they are in.

The state of matter is a deceptively simple concept. It turns out that any material, no matter what it is made of, can exist in one of three forms: solid, liquid or gas. These are categories of ...

In this interactive, adjust the temperature and pressure of three common substances and watch them morph into different states of matter. Along the way, you'll see just how inextricably ...