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Chapter 2 Vocab
Vocab from chapter 2
| Question | Answer |
|---|---|
| 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 from two or more simpler substances and can be broken down into those simpler substances. |
| Heterogeneous mixture | A type of mixture in which the parts of the mixture are noticeably different from one another. |
| Homogeneous mixture | A type of mixture in which the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another. |
| Solution | A mixture that forms when substances dissolve and form a homogeneous mixture. |
| Suspension | A heterogeneous mixture that separates into 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 from flowing; resistance to flowing. |
| Conductivity | A material's ability to allow heat of electric charges to flow. |
| Malleability | The ability of a solid to be hammered without shattering. |
| Melting point | The temperature at which a substance changes from a solid to liquid. |
| Boiling point | The temperature at which a substance boils; the temperature at which vapor pressure is equal to atmospheric pressure. |
| 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 change that occurs when some properties of a material change, but the substances in the material stay the same. |
| Chemical property | Any property that produces a change in the composition of matter. |
| Flammability | A material's ability to burn in the presence of oxygen. |
| Reactivity | The 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 | A solid that forms and separates from a liquid mixture. |
Created by:
lee.mcgrath
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