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, 100g 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. analyzing experimental data

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Darla claims that the first periodic table developed by mendeleev was not completely accurate, so it is not useful at all. harmony argues that it establish the periodic table we use today, making it more credible. who is correct and why? darla is correct, because a model that has any mistakes should be thrown out. darla is correct, because a good model would not need to change. harmony is correct, because mendeleev’s model had all of the information correct in the first version. harmony is correct, because mendeleev’s model made predictions that came true.