| A | B |
|---|
| pure substance | matter that always has exactly the same composition |
| element | substance that cannot be broken down into simpler substances |
| atom | smallest particle of an element |
| compound | substance made from two or more simpler substances and has a forumula |
| heterogeneous mixture | parts of the mixture are noticeably different from one another |
| homogeneous mixture | substances are so evenly distributed that you cannot distinguish substances |
| solution | mixture that forms when substances dissolve and form a homogeneous mixture |
| suspension | hetereogeneous mixture that separates into layers over time |
| colloid | mixture that contains some particles with intermediate particles |
| physical property | characteristic of a material that can be observed or measured |
| viscosity | tendency of a liquid to keep from flowing: resistance to flowing |
| conductivity | material's ability to allow heat or electric charges to flow |
| malleability | ability of a solid to be hammered without shattering |
| melting point | temp. at which a substance changes from solid to liquid |
| boiling point | temp. at which a substance boils |
| filtration | process taht searates materials based on size of particles |
| distillation | process that separates the substances in a solution based on their boiling points |
| physical change | change that occurs when some properties of a material change but substances in material stay the same |
| chemical property | property that produces a change in the composition of matter |
| flammability | material's ability to burn in the presence of oxygen |
| reactivity | property that describes how readily a substance combines chemically with other substances |
| chemical change | change that occurs when a substance reacts and forms one or more new substances |
| precipitate | solid that forms and separates from a liquid mixture |
| pure substance | an element or compound |
