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Chapter 2 Vocabulary
Vocabulary from 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 from two or more simpler substances and can be broken down into those simpler substances |
| heterogeneous mixture | a mixture where the parts are noticeably different than the others |
| homogeneous mixture | a mixture where the substances are so evenly distributed that it is difficult to distinguish one substance in the mixture from another |
| solution | the mixture that forms when substances dissolve and form a homogeneous mixture |
| suspension | a heterogeneous mixture that divides 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 measure without changing the composition of the substances in the material |
| viscosity | a liquid's resistance to flowing |
| conductivity | a material's ability to allow heat to flow |
| malleablility | the ability of a solid to be hammered without shattering |
| melting point | the temperature at which a substance changes from a solid to a liquid |
| 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 | the properties of the material change but the substances 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 of oxygen |
| reactivity | the property that describes how readily a substance combines chemically with other substances |
| chemical change | a substance reacts and forms one or more new substances |
| precipitate | any solid that forms and separates from a liquid mixture |
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