Question

read the descriptions of two experiments below.
experiment 1: a student did a test to see if the hardness of the soil affects the growth of sunflowers. she used a control group and experimental groups. she repeated her experiment several times and found each time that the hardness of the soil did not affect the growth.
experiment 2: a student did a test to see if the temperature of water affects the growth of cacti. she used a control group and experimental groups. her data supported her hypothesis.
which experiment is more likely to be reliable, and why?

Explanation:

Experiment 1 is more reliable. In Experiment 1, the student repeated the experiment several times. Repeating an experiment helps to reduce the impact of random errors and increases the confidence in the results. In Experiment 2, there is no mention of repetition. Without repetition, it is harder to be sure that the results are not due to chance or some unforeseen variable.

Answer:

Experiment 1 is more likely to be reliable because it was repeated several times. Repeating an experiment helps to ensure that the results are consistent and not due to random chance or errors.