In a scientific experiment, a control group:
check all that apply
1. is less important than an experimental group.
2. can be compared with an experimental group to assess whether one particular variable is causing a change in the experimental group.
3. must be kept in a laboratory.
4. is essential.|||2 %26amp; 4
Not 1 because without a control the results would not be considered valid
Not 3 because you can conduct experiments in places other than in a laboratory. To take an extreme example, robotic Mars explorers conduct experiments to see if there is life on Mars - the nearest lab is millions of miles away from them|||well i guess u could have 3 in there because the experiment would be done in a lab, but you would also defiantly have 4 in there|||I agree with GLH. 2 %26amp; 4
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