Answer:
matter is anything that occupies space and mass
Answer:Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids.
Explanation:Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
Of course they are small
Explanation:
The only way you can see them is by a microscope or a lens and can be anywhere.
