Everything in our environment, including man himself is made up of what we call matter. Matter is popularly defined as anything that has mass and occupies space. There are three different forms or states of matter, which are solids, liquids, and gases, whose characteristics depend on the forces of attraction between their molecules. There are four major points whereby we can differentiate between gases and liquids at the highest basic level, which are shape, hardness, volume and the capacity to flow.
The force of attractions between the molecules of a liquid is less than that of solid though, but the force of attraction is less than that of gas. Thus, this also implies that gases have the weakest form of attractions among the three states of matters. Though this two have no definite shape, as they only take the shape of the container in which they are contained, liquids have a definite volume, but gasses do not. Also, gases can be more easily compressed than liquids.
Gases and liquids are two of the states of matter in science. Others are solids and plasma. Sometimes, certain elements and things can turn from a gas to a liquid and vice versa. Take, for example, water. Water can be a solid, liquid, or gas depending on the temperature. Gases are usually created when the element is heated.
Sometimes, an element becomes a liquid either because it is already a liquid in its present state or by heating the element. Water is a liquid in its natural state and becomes a gas when water is heated. If you boiled water, you would notice that it doesn’t remain the same size. If pour boiled a half-gallon of water, then some of it would evaporate and become a gas.