Question

experiment 1: a student did a test to see if ultraviolet light slows plant growth. she followed a logical method and used a control group and experimental groups. she repeated her experiment several times and found each time that plants grow a little more slowly with ultraviolet light. experiment 2: a student did a test to see if a new fertilizer makes roses bloom earlier. she followed a logical method and used a control group and experimental groups. she performed one experiment and found that the fertilizer had no effect. which experiment is more likely to be reliable, and why? a. experiment 1, because the results supported the hypothesis b. experiment 1, because it gave the same results every time c. experiment 2, because the setup included a control group d. experiment 2, because it followed a logical method

Explanation:

In scientific experiments, reliability is enhanced when results are consistent across multiple trials. Experiment 1 was repeated several times with consistent results (plants growing slower with ultraviolet light). While both experiments used a control group and a logical method (which are good scientific practices), Experiment 2 only performed one experiment. One - time results are more prone to errors or flukes compared to results that are replicated multiple times.

Answer:

B. Experiment 1, because it gave the same results every time