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Properties of Matter
Vocab for chapter 2, Properties of Matter
Term | Definition |
---|---|
Pure substance | Matter that always has exactly the same composition; an element or compound |
Element | A substance that can't be broken down into simpler subsances |
Atom | The smallest particle of an element |
Compound | A substance that's 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 into layers over time |
Colloid | A mixture that contains some 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 from flowing-its resistance to flowing |
Conductivity | A material's ability to allow heat to flow |
Malleability | the ability of a solid to be hammered without shattering |
Melting point | The temperature at which a solid changes to a liquid |
Boiling Point | the temperature at which a substance boils |
Filtration | the 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 stay 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 | 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 |