Experimentation.
A constant is a part of the experiment that remains unchanged throughout the testing process. It provides a baseline for comparison with the variables being tested to determine their impact on the outcome of the experiment.
Well basically the "control" group is the part of the procedure or experiment where the specimen or whatever your testing is separated from everything else and nothing is done to it, so you have something to compare your other results to.
an experiment
the testing of an idea
i believe it is how long an experiment is going to take. for example, the testing range of an experiment with plants may take around a few weeks to months.
A controlled experiment is an experiment where there are limited or no variables other than the one you are testing for.
An experiment or method
You are testing the independent variable. The dependent variable is the one being measured.
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The idea that you are testing or proving/disproving.
is the experiment that you are testing
An experiment is a method of testing whether something is right. A conclusion is the answer which is reached once the experiment is finished.