| Term | Definition |
|---|
| pure substance | matter that always has the same composition |
| element | a substance that cannot be broken down into simpler substances |
| atom | smallest particle of an element |
| compound | a substance that is made from two or more simpler substances and can be broken down into those simpler substances |
| heterogeneous mixture | the parts of the mixture are noticeably different from one another |
| homogeneous mixture | the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another |
| solution | when substances dissolve and form a homogeneous mixture |
| suspension | a heterogeneous mixture that separates into layers over time |
| colloid | contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension |
| physical property | any characteristic of a material that can be observed or measured without changing the composition of the substance |
| viscosity | the resistance to flow...thickness of a liquid |
| conductivity | ability of a material to allow heat & electricity to flow |
| malleability | ability of a solid to be hammered without shattering |
| melting point | temperature at which a substance changes from solid to liquid |
| boiling point | temperature at which a substance changes from liquid to gas |
| filtration | process that separates materials based on the size of their particles |
| distillation | process that separates the substances in a solution based on their boiling points |
| physical change | when a substance undergoes a change of state &/or shape, but the chemical properties remain the same |
| chemical property | an ability to produce a change in the composition of matter |
| flammability | ability of a material to burn in the presence of oxygen |
| reactivity | how readily a substance combines chemically with other substances |
| chemical change | occurs when a substance reacts with another substance forming one or more new substances |
| precipitate | any solid that forms and separates from a liquid mixture |
Combine with other sets
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