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Chapter 2

Vocab List

QuestionAnswer
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 one of a class of substances that cannot be separated into simpler substances by chemical means.
Compound a pure substance composed of two or more elements whose composition is constant.
Mixture Blend of two or more substances, that can be separated by physical means
Homogeneous Solution A mixture which has uniform composition and properties throughout.
Heterogeneous Solution Two substances that when combined to not mix together.
Distillation Removing one liquid from another liquid or substance, using their differences in boiling points.
Physical changes A change in which a substance changes from one physical state to another but no substances with different composition are formed. Example Gas to Liquid - Solid.
Physical properties can be observed or measured without changing the composition of matter. Physical properties are used to observe and describe matter.
Chemical Changes The substances are changed into other substances by use of chemical reactions
Chemical Properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change.
Law of Conservation of Matter a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system
Created by: Masta_Pete