Gases

HELIUM

Helium is inside the balloon and hieum is a gas becuase it has the spead out molecles inside which is holding up the ballon and taking up space.

WATER VAPOR

Water Vapor is a gas because it molecles are spead out in the vapor which makes it gas it also has no definite shape or volume.

Gases are particle the move around alot still being able to fill their space. Gases have no definite volume or no definite shape because their shape and volume all depend on the space that the gas is filling.

The basket ball has air in it which is a gas because it is taking up space and the molecles are spreadout inside moving around.