Question

To test the hypothesis that plants grow faster in green light, a student set up 3 of the same type of plants. She placed the first plant under a green light, the second plant under a regular light bulb, and the third plant under a red light.
All of the following are the constants in the above experiment except __________.

Answer 1

The non-constants means that you're looking for the variables that are not changing throughout the experiment

Based on the scenario, the only variable that is not changing is the color of the light.

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