Matter is anything that takes up space and has mass. It is comprised of atoms and molecules, which vibrate a lot but never really move past each other. One example of matter in a solid is ice; the particles move very slowly and are closely compacted. One example of matter in a liquid is water. With water, the atoms and molecules are moving at a regular pace and again, they never really move past each other. An example of matter in gaseous form would be steam; steam is evaporated water that, when used for the purpose of showering, can fog up a nearby mirror because warm air rises. Along with this warm air is the water droplets from the steam.