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5 Cards in this Set
- Front
- Back
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Physical Change
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A change in one or more of matter's physical properties.
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Chemical Change
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Occurs when matter changes chemically into an entirely different substance with different chemical properties.
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The Law of Conservation of Mass
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Matter cannot be created or destroyed. Even when matter goes through physical or chemical changes, the total mass of matter always remains the same.
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Signs of Chemical Change
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Gas bubbles are released.
Something changes color. An odor is produced. A solid comes out of a solution. |
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Reversing Chemical Changes
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Since new substances are produced, these changes cannot often be undone. You can't change a fried egg back to a raw egg. Some can be reversed, but only through chemical change. Removing tarnish from a penny with vinegar. The acid reacts with the tarnish.
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