A controlled experiment is one that
a. proceeds slowly enough tha...

Question

A controlled experiment is one that
a. proceeds slowly enough that a scientist can make careful records of the results.
b. keeps all variables constant.
c. is repeated many times to make sure the results are accurate.
d. tests experimental and control groups in parallel.

Accepted Answer

Hey everyone. Let's take a look at this question together. The group that is tested alongside the experimental group but does not receive any treatment is known as what group. So let's recall what we've learned in the past about experiments and the different groups that make up those experiments. So we know that when we're doing an experiment we have two groups. And in the those two groups we have the experimental group. So experimental group. And that's the group that we're observing because we want to see if there's any change happening in that group so that we can make notes in our research. And then we know that the other group is our control. And we know that the control group is the one that we hold constant because we are comparing the experimental group to the control group to see if there's any change. And so that means that the answer choice A. Control is the correct answer. Because test group and experimental group are the same thing and that's that group that we are observing. And so B. And C. Are incorrect. And then answer choice D. Looks like it could be the right answer because we are holding the control group constant. However constant is not a group. So it's incorrect and constant just refers to the factors of that control group because they are being held. The control group is being held constant so that there's no change to it and we can use that as the comparison to the experimental group. So answer choice A is the only correct answer. I hope you found this video to be helpful. Thank you and goodbye.

A controlled experiment is one that a. proceeds slowly enough that a scientist can make careful records of the results. b. keeps all variables constant. c. is repeated many times to make sure the results are accurate. d. tests experimental and control groups in parallel.

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