Question

Juan designed an experiment to test what effect different substances would have on the freezing point of water. To test this, he had
several different containers, each with a different substance that could be dissolved in water. In one container there was milk, in
another there was sugar, and in another there was salt. He added the same amount of water to each container, and he had a final
container with only water in it for a control. Then, he put each container in a large freezer, and checked them every hour.
Did Juan use the only design he could have used for this experiment?
A. No; there is more than one way to design an experiment for a testable question.
B. No: there is always an infinite number of
C. Yes, there is only one way to freeze a substance.
res; there
D.
Yes, there is only one way to design an experiment for a testable question.
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