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Chapter 2

Matter it is any substance which has mass and occupies space
Pure Substance A sample of matter, either an element or a compound, that consists of only one component
Element A fundamental, essential, or irreducible constituent of a composite entity
Compound a substance formed by chemical union of two or more elements or ingredients
Mixture a physical combination of two or more pure substances
Homogeneous Solution Consisting of only one substance
Heterogeneous Solution consisting of two or more substances
Distillation The evaporation and subsequent collection of a liquid by condensation as a means of purification
Physical Changes a type of change in which the form of matter is altered but one substance is not transformed into another
Physical Properties any measurable property the value of which describes a physical system's state at any given moment in time
Chemical Changes a new substance is formed and energy is either given off or absorbed.
Chemical Properties any of a material's properties that becomes evident during a chemical reaction
Law of Conservation of Matter The mass of a closed system will remain constant over time. The mass of an isolated system cannot be changed as a result of the processes acting inside the system. Mass can't be created or destroyed.
Created by: Michaela.Kinney