Which is the test variable (independent variable) in this experiment?
the six weeks that passed before the plants were measured
the type of tomato plant used
the amount of water given to the plants
the type of water given to the plants
Which is the test variable (independent variable) in this experiment?
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The test variable (independent variable) in this experiment is the type of tomato plant used.
Explanation: The independent variable is the factor that is changed or controlled in an experiment to test its effects on the dependent variable. In this case, different types of tomato plants are being used to observe how they affect the outcome (such as growth or yield), while other factors like water amount or type should remain constant to ensure a fair test.