These two took a very definite shape. Scientists then discovered that something was a crystal if it has a definite shape. Once scientists began to study the fascinating forms of crystals, a bright new science was born that is helping to answer some of the most important questions asked by men in almost every other scientific field today. This young science is called crystallography-the study of crystals. This is what crystals are made of.
Molecules have different behaviors in different circumstances or surroundings.
In heated water, the molecules are flying all over the place. In water at room temp, the molecules are spread apart. In ice, the molecules are scrunched together with no room at all. The type of substance made up of certain molecules like sugar or salt also effects the behavior of the molecules in different circumstances. All matter comes in one of three forms-solid, liquid, gas.