leum industry to separate crude oil. The separated components of oil have many uses, gas, heating oil, lubricants, and materials from which plastics are made all come from crude oil being distilled.- A relationship between 2 quantities can be shown on a graph. - Density is the measure of how tightly matter is packed. Osmium is the densest substance on the earth a piece the size of a football is too heavy to lift.- Density may be used to identify substances. Ice floats in water because it has a lower density than water. ...