| A | B |
|---|
| Chemistry | study of matter and how it changes |
| matter | anything that has mass and occupies space |
| element | substance that cannot be broken down into simpler substances |
| atom | smallest particle that has the protperties of an element |
| compound | substance made af atoms more than one element bound together |
| molecule | smallest unit of a substance that exhibits all of the properties of that substance |
| chemical formula | chemical symbols and numbers indicating the atoms contained in the basic unit of a substance |
| mixture | combination of more than one pure substance |
| pressure | force exerted per unit area of a surface |
| viscosity | resistance of a fluid to flow |
| energy | the ability to change or move matter |
| evaporation | the change of a substance from a gas to a liquid |
| sublimation | change of a substance from a solid to a gas |
| chemical property | the way a substance reacts with others |
| Phycical property | characteristic that can be observed without changing composition |
| melting point | temperature at which a solid becomes a liquid |
| boiling point | temperature when a liquid becomes a gas |
| chemical change | change occurs when a substance changes composition new substance |
| physical change | change in form not composition |
| fluid | a substance that flows liquid or gas |
| reactivity | ability of a substance to combine chemically |
| density | mass per unit volume |
