In which of the following ways are the designs of Experiments 1 and 2 different? F. In

Question:

In which of the following ways are the designs of Experiments 1 and 2 different?
F. In Experiment 1 mass was held constant, while in Experiment 2 it varied.
G. In Experiment 1 volume varied, while in Experiment 2 it was held constant.
H. In Experiment 1 volume was held constant, while in Experiment 2 mass was varied.
J. In Experiment 1 volume was held constant, while in Experiment 2 mass was held constant.

Experiment 1
The group of students wanted to know which materials moved down the plane in the shortest amount of time. The students used blocks of wood, steel, aluminum, glass, plastic, and concrete. The dimensions of each block were the same, the volume of each block remained constant, and the mass of the blocks was varied. The incline of the plane was set at 45◦ for each trial. The students conducted 3 trials for each material, and recorded the results in Table 1.

Experiment 2
The students conducted a similar experiment as in Experiment 1 to test the effect of volume on the time that it took for the blocks to move down the inclined plane. The results are shown in Table 2.