Question

Refer to the scenario.

A scientist sets up an experiment to see how colored lights affect the height of plant growth. He grows one group of plants in full sunlight, one group under red lights, one group under blue lights, and one group under green lights.

All the plants are exactly that same type and all receive an equal intensity (brightness) of light. At the end of the experiment he measures all the plants.

Question
What is the independent variable?
Responses

the time spent under the light
the time spent under the light

the color of the light
the color of the light

the brightness of the light
the brightness of the light

the type of plant

Answer 1

The color of the light.