Question

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?

Answer 1

The student might question the validity of the experiment for several reasons. One possible reason is that the experiment only tested the preference of earthworms for dark places. It did not consider other factors that could influence their behavior, such as temperature, humidity, or soil composition. Additionally, the sample size of ten worms might be considered small, and the experiment could be repeated with a larger sample size to increase confidence in the results. Finally, the experiment was conducted in an artificial environment, and it is possible that earthworms might behave differently in their natural habitat. These are some potential concerns that a student might raise to question the validity of the experiment.

Step-by-step explanation: