Changing the Density of a Liquid - Adding Salt

Fourth in a set of several little lessons on density, this one compares the density of fresh and salt water. First by demonstration, and then by a hands-on activity, learners find that adding salt increases the density, as is evidenced by a carrot slice floating higher in the liquid. 

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Concepts

Pros

  • Lab sheet questions stimulate critical thinking and provide a clear procedure
  • A valuable component of a comprehensive mini unit on density
  • Teachers are well supported by directions, answers, and assessment criteria
Cons

  • None