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14 August, 07:02

Which is an example of making a qualitative observation?1measuring the speed of the chemical reaction2describing how copper changes color in chlorine3recording how long it takes to burn magnesium4showing the results of an experiment with a graph

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  1. 14 August, 08:19
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    2 for sure! because it is describing
  2. 14 August, 08:55
    0
    There are two options for describing observations. They are either qualitative or quantitative. Since 1, 3, and 4 are all identifying results by qualifying them, process of elimination allows us to choose 2 as the only one left. And describing how copper changes color is obviously not a quantitative observation as they are not reporting any numbers along with the observation.

    The answer is 2
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