Hypothesis or postulate .
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The factor that is being tested in an experiment is called a variable. The factor that is measured or observed is called the dependent variable.
anything that is not being tested in an experiment but may affect the results that you get.
A hypothesis can be tested by an experiment
tom ford
There are many different things that are measured and tested by the data collected in an experiment. Color changes are one thing that can be measured and tested for example.