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PhySci Chapter 2
| Term | Definition |
|---|---|
| Pure Substance | Matter that always has exactly the same composition. |
| Element | A substance that cannot be broken down into simpler substances. |
| Atom | The smallest particle of an element |
| Compound | A substance that is made of two or more simpler substances and can be broken down into those simpler substances |
| Heterogeneous mIxture | A mixture where the parts of that mixture are noticeably different from each other |
| Homogeneous mixture | A mixture where the substances are so evenly distributed that it is difficult to distinguish one substance from another. |
| Solution | When substances dissolve and form a homogeneous mixture. |
| Suspension | A heterogeneous mixture that separates into different layers over time |
| Colloid | A mixture that 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 substances in the material |
| Viscosity | The tendency of a liquid to keep it form flowing |
| Conductivity | A materials ability to allow heat to flow |
| Malleability | The ability of a solid to be hammered without shattering |
| Melting point | The temperature at which a substance changes from a liquid to a solid |
| Boiling point | The temperature at which a substance boils |
| Filtration | A process that separates materials based on the size of their particles |
| Distillation | A process that separates the substances in a solution based on their boiling points |
| Physical change | A process that occurs when some of the properties of a material change, but the substances in the material stay the same |
| Chemical property | Any ability to produce a change in the composition of matter |
| Flammability | A materials ability to to burn in the presence of oxygen. |
| Reactivity | The property that describes how readily a substance combines chemically with other substances. |
| Chemical change | A process that occurs when a substance reacts and forms one or more new substances. |
| Precipitate | Any solid that forms and separates from a liquid mixture. |
Created by:
hunter.albohn
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