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Chapter 2
Question | Answer |
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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. |