## 1.

The Correct Answer is (B) — The question asks you about Study 1, which used steel cubes of various masses, but not 750 g. From Table 1, 750 g is between the 500 g and 1000 g, which took times of 3.10 s and 1.85 s, respectively. This allows you to eliminate (D) and (A). Then, you’ll need to get a bit more precise. 750 g is precisely halfway between 500 g and 1000 g, so you should assume that the time of a 750 g cube is halfway between the corresponding times of a 500 g and 1000 g cube—that’s roughly 2.5 seconds, or (B).

## 2.

The Correct Answer is (F) — This question asks you to extrapolate based on Table 2—the trend in the table is that as angle increases, time decreases. The time at 75° should be less than the smallest time in the table, 3.25 seconds. If you chose (J), you may have misread the table and assumed that time increased as angle increased. If you chose (G) or (H), you may have forgotten that 75° is higher than any of the angles presented in the graph.

## 3.

The Correct Answer is (C) — This question asks you whether you could expect a glass cube on a steel plane to go faster than a steel cube on a wood plane. To answer this question, you’ll need to look at Table 3, and compare the times for the relevant materials: glass plane and wood plane. Either way, you’ll find that a combination of steel and wood takes longer than steel and glass, so your prediction should be “yes.” This allows you to eliminate (A) and (B) without reading any further. Now you’ll need to take a closer look at (C) and (D)—they both refer only to the data in Table 3, and they only differ by one word. (C) says steel moves faster on glass than on wood, and (D) says steel moves slower on glass than on wood. Therefore, you can eliminate (D) and circle (C). If you chose (A), you may have misread the question and thought that the glass cube was slower than the steel cube. If you chose (B) or (D), you may have misread the times in Table 3, or compared the wrong materials.

## 4.

The Correct Answer is (F) — This question hinges on you understanding that “decreasing order of time” means “longest time to shortest time.” It also asks you to insert a new piece of data (concrete, 4.40 seconds) into Table 3—you may want to draw in an extra row with this information. Rather than making a complete prediction by arranging all the rows in order of time, start eliminating as early as possible by identifying the extreme values. Wool has the longest time (6.20), so it must begin the list—thus, you can eliminate (H) and (J). Then, you should note that the only difference between (F) and (G) is that concrete and wood switch places, so you should simply compare the times for both to decide which is incorrect. At 4.40 sec., concrete has a longer time than wood, at 3.85 sec., so (G) is incorrect.

## 5.

The Correct Answer is (D) — This question asks you to note the trend in Table 1 and translate it into graph form. While you were skimming the passage, you may have already summarized the relationship between mass and time: as mass increases, time decreases. Even without noting this trend, you should be able to eliminate (A) by quickly eyeballing it—the time values in Table 1 don’t remain constant, so there shouldn’t be a flat, horizontal line. (B) is incorrect because it shows time increasing as mass increases. The graph for (C) clearly shows a time of 2.5 seconds at 1000 g, which is inconsistent with Table 1, which shows a time of 1.85 seconds at the same mass. Thus, you can eliminate (C).