The wetness of the dish is the independent variable. The independent variable is the one that you change on purpose. Your teacher is WRONG on that one.
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As for the control group, in my opinion you didn't have one. A control group for this experiment would have been 10 pill bugs 5 in each two dry interconnected petri dishes.
The experiment is poorly designed without this control and without doing several repetitions. If I really wanted to study this I would start out with at least 10 pairs of chambers.10 that were both dry, and 10 that were one wet and one dry.
That being said, if I had to call one of the groups a control group I would say it was the group that was already in the wet petri dish. We expect them to stay put and the others to move.
All and all I would say this is a very confusing experiment designed by a teacher that has no background in research.What is the independent variable and control group?
'; my teacher said that time was the independent variable and that all the pill bugs were the control group';
I challenge your teacher to explain how time is an independent variable. We have absolutely no control over time. It's an ';independent variable'; in every experiment.
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the independent variable is what you change,
the dependent variable is what you measure, and
the control is the smallest or least level of your independent variable
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