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8 Cards in this Set
- Front
- Back
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What is a physical change?
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A change in physical properties.
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How can you tell if a change is physical?
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- no new substance is created
- change of phase (liquid to gas, etc.) - change of amount - mixing - change of color tint |
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What is a chemical change?
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A change in chemical properties.
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How can you tell if a change is chemical?
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- New substances that differ in chempical properties and composition are formed
- Bubbles (gas formation) - Precipitate forms - Heat and light - Color change |
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What is the LAW OF CONVERSION OF MATTER?
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Matter cannot be created or destroyed by chemical change. (No change is total mass.)
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Classification of Matter - Matter must be one of what three things?
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- Element
- Compound - Mixture |
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What are the properties of an element?
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- Pure substance
- Cannot be broken down into other substances by chemical change |
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What are the properties of a compound?
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- Two or more elements
- Chemicalled combined |
