Even when liquids change their shape, they always take up the same amount of space. Their volume stays the same. Examples of gases include steam, helium and oxygen. They are often invisible.

Although the three states of matter are solid, liquid, and gas, not all substances seem to fit perfectly into one of these groups. Take a look at the substance below and see if you can decide whether ...

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 stuff that have certain observable properties.

When a liquid-fuel rocket takes off, it can switch its gas jet from side to side, correcting any tendency to veer off course. But solid-fuel rockets have no separate combustion chamber ...

This means that cats should be classified as liquids, right? The question is not so easy to answer. “If we wait long enough, ...

The unique structure of PAMs has the potential to transform industries, from healthcare to robotics, by offering properties never before seen in materials science. PAMs represent a bold step forward ...

For a hundred years, physicists have grappled with a seemingly simple question: How can the transition of substances into different states be easily predicted? Understanding the three states of ...

Students explore the attractions and motion of atoms and molecules as they experiment with and observe the heating and cooling of a solid, liquid, and gas.

The density of solid iron = 7.8 g/cm 3 The density of liquid iron = 6.9 g/cm 3 A substance evaporates when it changes from the liquid state to the gas state. Its particles move freely and are very ...