Most substances can exist as a solid, liquid or gas. They can change state, usually when they are heated or cooled. For example, liquid water turns into water vapour when it is heated enough ...

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 ...

Water is the only substance on Earth that occurs naturally as a solid, liquid, and gas ... matter into other forms—for example, converting carbon dioxide gas into solid carbon dioxide (dry ...

Today I want to give an example of the importance of those liquids that lie between crude and natural gas. These mixtures can be more important, depending on the relative composition of the flows ...