you've made the hypothesis that the higher the density of a rock, the higher the temperature at which it will melt, because a denser rock contains more material.
what is one thing that you should control in an experiment designed to test this hypothesis?
a. the color of each rock
b. the weight of each rock
c. the density of each rock
d. the temperature at which each rock melts

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.