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Chemical Changes

Physical Change A change that changes a substance's physical property only (Ex. color, size, shape, and state of matter).
Physical Property Characteristics that can be observed without changing the matter itself (Ex. color, density, melting and boiling points).
Chemical Change A change to both the physical and chemical properties of a substance; A new substance is formed.
Chemical Property Characteristics that can be observed ONLY when the matter changes as a result of a chemical reaction (Ex. Decaying, burning, rusting, or cooking).
Evidence of Chemical Changes The following are signs of a chemical change: Color change, Production of a gas (bubbles), production of precipitate, light formation, and temperature (heat) change.
Law of Conservation of Mass During either a physical or chemical changes, the total mass/weight of the matter is conserved (kept); Matter is neither created or destroyed, it just changes forms.
Weight The measurement of an object's mass as GRAVITY acts on it.
Precipitate A solid that forms and separates from a solution; Is evidence of a chemical change.
Created by: jessiebeled