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do you turk?
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Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

refreshes the supply of nutrients in lake   lake turnover  
floats, the volume of displaced water is equal to   portion of the object that is submerged  
stays afloat as long as the buoyant force   equal to weight  
object that is more dense   sink  
Using less   conservation  
obtaining fresh water from salt water   desalination  
amount of one substance in a certain volume of another   concentration.  
pH is a measure of   acidity.  
first step in treating water   filtration  
chlorine being added to drinking water   kills disease-causing microorganisms.  


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