Melanie wants to observe 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?
a) Drawing a conclusion
b) Testing with an experiment
c) Doing background research
d) Analyzing experimental data
1 answer
b) Testing with an experiment