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Smith-pnhs-properties of matter I.S. vocab

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Question
Answer
What is a pure substance?   A pure substance is matter that always has exactly the same composition.  
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What is an element?   An element is a substance that cannot be broken down into simpler substances.  
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What is an atom?   An atom is the smallest particle of an element.  
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What is a compound?   A compound is a substance that is made from two or more simpler substances and can be broken down into those simpler substances.  
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What is a heterogeneous mixture?   A heterogeneous mixture is a type of mixture where the parts of the mixture are noticeably different from one another.  
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What is a homogeneous mixture?   A homogeneous mixture is a type of mixture where the substances are so evenly distributed that it is difficult to tell one substance in the mixture from the other.  
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What is a solution?   A solution is the mixture that forms when substances dissolve and form a homogeneous mixture.  
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What is a suspension?   A suspension is a heterogeneous mixture that separates into layers over time.  
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What is a colloid?   A colloid is a mixture that contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension.  
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