has no shape and doesn't take space, such as air
is something that doesn't have a shape but takes up space, such as water and juice
something that has a shape and takes up space
Gas particles move around
There are actually two more states or phases that matter can take, but we don't see them much in our everyday life. One is called plasma. Plasma occurs at very high temperatures and can be found in stars and lightning bolts. Plasma is like gas, but the molecules have lost some electrons and become ions.
Lighting is an example of Plasma
http://www.ducksters.com/science/solids_liquids_gases.php
https://www.education.com/lesson-plan/states-of-matter/