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Gretchen wants to run a test to discover whether glass, copper, wood, or plastic conduct electricity. She sets up a circuit connecting a battery to a light bulb, with a small gap she will use to test the conductivity of the different substances. One at a time, she connects the circuit with the chosen test material, and records whether or not the light bulb comes on. The variables in this experiment are

Respuesta :

battery,and i think the light bulb because it depends how much energy the light bulb needs
annipatrick

The plastic, wood, copper, and glass are the variables. The variables in an experiment are the things we can change and then test.

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