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Classification of
Classification of matter
Term | Definition |
---|---|
Tyndall Effect | The scattering of light by colloidal particles. |
pure substance | A type of matter with fixed composition. |
element | All atoms have the same identity. |
compound | A substance in which the atoms of two or more elements are combined chemically in a fixed proportion. |
chemical combination | Elements combine to form a brand new material |
mixture | A physical combination of two or more pure substances whose composition may vary. |
physical combination | Combined materials do not change their identity |
heterogeneous mixture | The materials are not mixed in the same ratio throughout. |
homogeneous mixture | Materials are mixed in the same ratio throughout. |
solution | A homogeneous mixture where the particles never settle out. |
colloid | A heterogeneous mixture where the particles never settle out. |
suspension | A heterogeneous mixtures where particles will settle out and separate. |
property | A characteristic or behavior used to describe a material. |
physical property | A characteristic that you can observe or measure without changing the identity of the substance. |
chemical property | A property that is observed because the identity of the substance will change. |
physical change | A change where there is no change in the material's identity. |
chemical change | A change where a substance changes its identity. |
Two examples of elements | carbon, hydrogen |
Two examples of a compound | table salt, water |
Two examples of heterogeneous mixtures | pizza, lucky charms cereal |
Two examples of homogeneous mixtures | koolaid, salt water |
Two examples of a solution | air, vinegar |
Two examples of a suspension | Italian dressing, pond water |
Two examples of physical properties | color, shape |
Two examples of chemical properties | flammable, sensitive to light |
Two examples of physical change | cutting, crushing |
Two examples of chemical change | rusting, spoiling |
Distillation | The process used for separating substances in a mixture by evaporating a liquid and recondensing its vapor. |
Law of conservation of mass | the mass of all substances that are present before a chemical change equals the mass of all the substances that remain after the change. |