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physical change

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
explain when a solid starting to melt   it had hit the melting point  
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explain when a substance mixed into another substance it will change?   a color will change  
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predict the temperature if a substance mixed with another substance?   the temperature will decrease or increase  
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examine when two solution are combined and give me the named of the form/   a solid substance that called a precipitate  
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predict when a solid and liquid are combined?   they form gas bubbles  
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predict if the temperature was at 200F   the water will not boil  
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explain density   the mass of the water  
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