Chemical Changes
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| Physical Change | A change that changes a substance's physical property only (Ex. color, size, shape, and state of matter).
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| Physical Property | Characteristics that can be observed without changing the matter itself (Ex. color, density, melting and boiling points).
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| Chemical Change | A change to both the physical and chemical properties of a substance; A new substance is formed.
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| 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).
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| 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.
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| 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.
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| Weight | The measurement of an object's mass as GRAVITY acts on it.
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| Precipitate | A solid that forms and separates from a solution; Is evidence of a chemical change.
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