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Chapter 2 Vocabulary
vocab
| 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 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, the mixture formed is a solution |
| 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 propety | 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-its resistance to 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 solid to liquid |
| boiling point | the temperature at which a substance boils |
| filtration | is 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 | occurs when some of the properties of a material change, but the substances in the material remain remain the same |
| chemical property | any ability to produce a change in the composition of matter |
| flammability | a material's ability to burn in the presence oxygen |
| reactivity | the property that describes how readily a substance combines chemically with other substances |
| chemical change | 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:
morgan.kaisk
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