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17 October, 14:36

Controls are defined as ___.

A) variables scientists observe for changes

B) things that change during an experiment

C) variables that are changed by the scientist

D) things that are kept constant during an experiment

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Answers (2)
  1. 17 October, 15:07
    0
    things that are kept constant during an experiment

    Explanation:

    A controlled variable is a variable that could change, but that the experimenter intentionally keeps constant in order to more clearly isolate the relationship between the independent variable and the dependent variable
  2. 17 October, 17:43
    0
    D!

    Explanation:

    i hope dis is right! : D
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