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Brown-pnhs-intro to I.S.H vocab

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Question
Answer
What is a pure substance?   Matterb that always has exactly the same composition. EX. table salt  
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What is an element?   A substance that cannot be broken down into smaller substances. EX. Helium  
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What is an atom?   The smallest particle of an element.  
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What is a compound?   A substance that is made from two or more simpler substances and can be broken down into more simpler substances. EX. Sillicon Dioxide  
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What is a solution?   When substances disslove and form a homogenous mixture, the mixture that forms is a solution.  
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What is suspension?   A heterogeneous mixture that separates into layers over time.  
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What is colloid?   Contains some particles that are intermediate in size between the small partials and large particles in a suspension.  
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What is a heterogeneous mixture?   The parts of the mixture are noticably different from one anthoer.  
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What is a homogeneous?   The parts of a mixture are evenly distributed throughout the substance.  
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