What does gas in science mean?

Answer 1

There are four states of matter -- solid, liquid, gas and plasma. You don't encounter plasma much in everyday life so let's stick with with the first tree. Frozen water (ice) is its solid form, the stuff you drink and makes the oceans is its liquid form and when it evaporates forming water vapor is it's gaseous form. Most if not all matter has these forms. Though you normally think of the oxygen you breathe as a gas it can also be a liquid and a solid. You normally think of iron as a solid but it can be melted to a liquid and boiled into a gas.

Answer 2

In science, gas refers to a state of matter where particles are free to move and have no fixed shape or volume. Gases expand to fill their container, and their behavior is described by gas laws like Boyle's law and Charles's law. Examples include oxygen, nitrogen, and carbon dioxide.

Answer 3

it is a gas.