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chapter2
chapter2 vocab
Term | Definition |
---|---|
Pure subtance | Matter that always has exactly the same composition. |
Element | Is a substance that cannot be broken down into simpler substances. |
Atom | Is the smallest particle of an element. |
Compound | Is a substance that is made from two or more simpler substances and can be broken down into those simpler substances. |
Heterogeneous mixture | Parts of the mixture and noticeably different from one another. |
Homogeneous misxture | 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. |
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 property | Is any characteristics of a material that can be observed or measured without changing the composition of the substances in the material. |
Viscosity | Tendency of liquid to keep from flowing. 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 | Substances changes from solid to liquid. |
Boiling point | Temperature at which a substance boils. |
Filtration | A process that separates materials based on the size of their particles. |
Distilation | 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 the same |
Chemical property | Any ability to produce a change in the composition of matter. |
Flammability | Materials ability to burn in the presence of oxygen. |
Reactivity | 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 | Solid that forms and separates from a liquid mixture. |