Gas Density. An important property of any gas is its density. ... But for gases, the density can vary over a wide range because the molecules are free to move. Air at the surface of the earth has a very different density than air 50 kilometers above the earth.

Is it true that gases have high density?

Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy.

Does gas have low density?

Its particles move freely and are very far apart, so there is a large increase of volume. The same mass of gas will have very much greater volume than the liquid, and so will have much lower density.