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Chapter 2 Vocab
Study for test
Term | Definition |
---|---|
Pure Substance | Matter that always has exactly the same composition; an element or compound: |
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 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 Change | A change that occurs when some properties of a material change, but the substances in the material stay the same: |
Viscosity | The tendency of a liquid to keep from flowing; Resistance to Flowing: |
Conductivity | A materials ability to allow heat or electric charge 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; the temperature at which vapor pressure is equal to atmosphere pressure: |
Filtration | a process that separates materials based on the size if their particles: |
Distillation | A process that separates the substances in a solution based on their boiling points: |
Physical Property | Any Characteristics of a material that can be observed or measured without changing the composition of the substance in the material: |
Chemical Property | Any property that produces a change in the composition of matter: |
Flammability | A material's ability to burn in the pressure oxygen: |
Reactivity | The property that describes how readily a substance combines chemically with other substances |
Chemical Change | A 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: |