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Chapter 2 vocab
vocab words
Term | Definition |
---|---|
Pure Substance | Matter that always has exactly the same composition. |
Element | Is a substance that cannot be broken down into simpler substances. |
Compound | Is a substance that is made from two or more simpler substances and can be broken down into simpler substances. |
Heterogeneous Mixture | Parts of a mixture that 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. |
Atom | Smallest particle of an element. |
Solution | When substances dissolve and form homogeneous mixture. |
Suspension | 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 of measured without changing the composition of the substances in the material. |
Viscosity | The tendency of a liquid to keep from flowing. |
Conductivity | A materials ability to allow heat to flow. |
Malleability | The ability of the solid to be hammered without shattering. |
Melting Point | The temperature at which a substances 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 the boiling points. |
Physical Change | Occurs when some of the properties of a material change, but the substances in the material remain the same. |
Chemical Property | Any ability to produce a change in the composition of matter. |
Flammability | A materials ability to burn in the presence of 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 |