A biology student wanted to study how the amount of light affects the growth of aquatic plants over the course of a week. She set up two tanks with four plants in each. Both tanks were identical in every way except for the amount of light provided.

Question

A biology student wanted to study how the amount of light affects the growth of aquatic plants over the course of a week. She set up two tanks with four plants in each. Both tanks were identical in every way except for the amount of light provided.

What is one thing the student could do to improve the accuracy of her results?

A: Grow the plants for a shorter length of time

B: Eliminate data that does not fit with her hypothesis

C: increase the size of both tanks

D: use a greater number of plants

Answer 1

To improve the accuracy of her results, the student could choose option D: use a greater number of plants. By increasing the number of plants in each tank, the student can collect data from a larger sample size, which will make the results more statistically meaningful and reliable. With a larger number of plants, any variations or differences in growth due to the amount of light provided will be more evident and less likely to be influenced by individual variations or outliers. This will make the results more robust and increase the confidence in the conclusions drawn from the experiment.

A biology student wanted to study how the amount of light affects the growth of aquatic plants over the course of a week. She set up two tanks with four plants in each. Both tanks were identical in every way except for the amount of light provided.

D.