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Chapter 2

Matter The substance or substances of which any physical object consists or is composed
Pure Substance A sample of matter, either an element or a compound, that consists of only one component with definite physical and chemical properties and a definite composition.
Element A one of a class of substances that cannot be separated into simpler substances by chemical means.
Compound pure substance composed of two or more elements whose composition is constant, and cannot be separated by physical means, but can by chemical means.
Mixture Any combination or blend of different elements, kinds, qualities.
Homogeneous Solution A solution composed of parts or elements that are all of the same kind.
Heterogeneous Solution A solution composed of parts or elements that are different kinds.
Distillation A process that uses differences in boiling temperature to separate mixtures and solutions.
Physical Changes Changes to the visual properties of a substance that do not change the chemical make-up.
Physical Properties The properties of a substance that can be seen (i.e. not chemical make-up)
Chemical Changes Changes in the chemical properties of a substance that do change the chemical make-up.
Chemical Properties The properties of a substance that can not be seen, but can be found by tests.
Law of Conservation of Matter A law in Science that states that matter can not be created or destroyed, only changed in form.
Created by: mquade