AccelePrep for the ACT Test 2nd Edition Student Text

208 • S URGE TO S UCCESS ! S CIENCE T EST P REP

7. Which of the following conclusions is consistent with the data presented in the table? Ǥ Š‡ ™‡‹‰Š– ‘ˆ –Š‡ ϐ‹”•–„‘” ‹• ’”‘’‘”–‹‘ƒŽ –‘ –Š‡ ˆ‘‘† ‹–ƒ‡Ǥ Ǥ Š‡ ™‡‹‰Š– ‘ˆ –Š‡ ϐ‹”•–„‘” ‹• ”‡Žƒ–‡† –‘ –Š‡ –‡’‡”ƒ–—”‡Ǥ Ǥ Š‡ ƒ‰‡ ‘ˆ –Š‡ ‘–Š‡” ƒ– –‹‡ ‘ˆ ϐ‹”•– ‘ˆˆ•’”‹‰ǯ• „‹”–Š ‹…”‡ƒ•‡• with decreasing food intake. Ǥ Š‡ ƒ‰‡ ‘ˆ –Š‡ ‘–Š‡” ƒ– –‹‡ ‘ˆ ϐ‹”•– ‘ˆˆ•’”‹‰ǯ• „‹”–Š †‡…”‡ƒ•‡• with decreasing food intake. 1. The passage states that the plotted measurements are for an object of mass m , and the y -variable is in units of g cm /s 2 2 : . Therefore, the kinetic energy of an object of mass m †”‘’’‡† ˆ”‘ ͶǤͷ… ‹• ˆ‘—† directly from the graph. (If the item asked about an object of mass 2 m , it would be necessary to double the y- ˜ƒŽ—‡•ȌǤ ‘…ƒ–‡ ͶǤͷ ‘ –Š‡ x -axis and the corresponding value on the y -axis. The y -value of this coordinate pair is the kinetic energy for the object of mass m dropped ˆ”‘ ͶǤͷ…ǣ Ͷͷ g cm /s 2 2 : , (C). 2. If the heights (“run”) used in the new set of experiments are the same as those used in the original experiment, but the kinetic energy values (“rise”) are double the original values, then the denominator of the new slope (“run”) is unchanged, while the numerator of the new slope (“rise”) is multiplied by two. Therefore, the new slope is equal to twice the original slope, (F). 3. To study the effect of temperature on sexual maturity, experiments in which only temperature is varied must be compared. Of the answer choices, only Experiments 1 and 4, (C), have the same food intake ȋͳͷ ‰”ƒ•Ȍ ƒ– –™‘ †‹ˆˆ‡”‡– –‡’‡”ƒ–—”‡• ȋʹͷι ƒ† ͵ͷι ȌǤ 4. A male at any age, (H) and (J), cannot be used to determine the age at which a female gives birth. Furthermore, if the experiment is begun with adults, (F), then there is no way of knowing how big a role the current control of the animals’ environment has compared to their past (unknown) environment. Therefore, newborn females, (G), are the best test subjects for the experiment. 5. …‘–”‘ŽŽ‡† ‡š’‡”‹‡– ˆ‘” š’‡”‹‡– ͷ ™‘—Ž† Šƒ˜‡ –‘ „‡ ‹†‡–‹…ƒŽ except for the variable of interest (in this case, temperature). Of the Ž‹•–‡†…Š‘‹…‡•ǡ ‘Ž› š’‡”‹‡– ͸ ‹• ‹†‡–‹…ƒŽ –‘ š’‡”‹‡– ͷ ‡š…‡’– for the average food intake, (D). 6. Both an increase in temperature, (G) and (J), and an increase in food, (H), cause a decrease in the birthing age. Rather, the item asks for the factor that will cause an increase in the birthing age. If all other variables are kept constant, either a decrease in food, (F), or temperature will result in an increase in the age at which the animals ϐ‹”•– ‰‹˜‡ „‹”–ŠǤ

Answers:

Return to the pages below to review each item:

1. p. 205 2. p. 205 3. p. 206 4. p. 207 5. p. 207 6. p. 207 7. p. 208