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Force/Motion Week 5

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Chemical   An element or compound  
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Chemical Change   A chemical reaction; a process that changes substances into new substances  
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Physical Reaction   A change in matter that does not affect its chemical composition  
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Chemical Reaction   A chemical change; a process that changes substances into new substances  
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Acid   Any substance with a pH less than 7; acids turn blue litmus paper red  
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Atom   The smallest unit of an element that has the properties of that element  
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Matter   Material that has mass and takes up some amount of space  
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Compound   A chemical combination of two or more elements  
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Molecule   Two or more atoms joined together  
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Element   A pure substance that cannot be broken down into simpler substances by chemical reactions  
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