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. A scientist conducts an experiment to test the effects of light on earthworm activity. Which is a variable in this experiment?

. A scientist conducts an experiment to test the effects of light on earthworm activity. Which is a variable in this experiment?
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A scientist conducts an experiment to test the effects of light on earthworm activity. Which is a variable in this experiment?

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User Bill Chen
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The amount of light. He is testing the effects of light, which implies there will be different amounts of light tested to reach a conclusion.
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User Alsami
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