Question

(01.01 mc) melanie recorded observations on the effect of two new fertilizers on the growth of plants. three identical plants having a height of 15 cm were used for the experiment. no fertilizer was added to the first plant, 100 g of fertilizer a was added to the second plant, and 100 g of fertilizer b was added to the third plant. all other growing conditions of the plants were kept constant. which step of the scientific method did melanie do here?

analyzing experimental data

testing with an experiment

drawing a conclusion

doing background research

Explanation:

• Analyzing experimental data: This step involves examining data after an experiment, but Melanie is conducting the experiment, not analyzing data yet.
• Testing with an experiment: Melanie set up an experiment with plants, different fertilizers, and controlled conditions to test the effect of fertilizers on plant growth, which matches this step.
• Drawing a conclusion: This is done after analyzing data, not during the experimental setup.
• Doing background research: This is done before the experiment to gather info, but Melanie is performing the experiment here.

Answer:

B. Testing with an experiment