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.

What is the independent variable in this experiment?
pot size
light color
plant type
amount of water

Answer 1

light color

Answer 2

light color

Answer 3

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 __________.
amount of water
plant type
light color
pot size