ILL GIVE! Allen and Marquis wondered how earthworms responded to different environmental conditions. Both boys agreed that earthworms lived in the ground most of the time: dark, damp, cool. They hypothesized that earthworms liked to live in dark places. Next, they set up the experiment you see here to test their hypothesis: a container, divided in half using black paper. Marquis placed ten worms in the container and turned the light on. All ten of the worms moved to the shaded side of the container behind the black paper. Both Allen and Marquis agreed that their hypothesis was supported. One student questioned the validity of the experiment. Why would he/she do that?
A)There is more than one independent or manipulated variable needed to make this a valid experiment.
B)Under the experimental conditions, you cannot say what determines earthworm behavior: light or heat.
C)The boys did not take into account their initial statement and include dampness as a second variable.
D)The boys did not test enough earthworms. They should have run more trials or used more