Matter can be anything
Matter is energy
Matter is everything the object is made of
Matter can only be a solid
Everything in the universe
Anything that has mass and takes up space
Anything that is found on the periodic table
Anything that you can observe with your senses
A gas has a certain shape that does not change.
A gas changes shape over a long period of time.
A gas spreads out to fill whatever space is available.
A gas gas a tightly packed shape.
Mass is different in different places.
Mass is measured in ounces and pounds.
Mass changes from Earth to the Moon.
Mass remains the same no matter where the object is.