Can you imagine iron gas? It is a possibility. Gases are
one of the three states of matter, along with solids and liquids. Materials
can exist in these three states - but we usually only see one or two.
We know that iron is a hard, heavy solid metal - and can also be a runny
liquid. But we see water in three different states - solid, liquid and
Solid water is called ice; liquid water is familiar; and
there is water gas - or steam. A gas has weight, but no shape - and it
fills the space around it. So steam quickly fills your bathroom.