AccelePrep for the ACT Test 2nd Edition Student Text

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

6. In Experiment 1, gravity accelerates the stone as it falls from the cliff, causing it to pick up speed as it drops. Which of the following series of pictures most resembles how the stone appears as it drops?

SUM IT UP – APPLICATION

Application items ask you to: • Use the results of an experiment to evaluate a new situation. • Reevaluate an experiment in light of new information. • Predict how an author would respond to new information or argumentation.

1. Š‹• ‹–‡ –‡•–• ›‘—” ƒ„‹Ž‹–› –‘ ϐ‹† „ƒ•‹…‹ˆ‘”ƒ–‹‘ ‹ –Š‡ –‡š– –Šƒ– describes a simple data presentation. Figure 1.2 presents data on soil erosion caused by both wind erosion and sheet and rill erosion. According to the second sentence of the passage, as well as the †‡•…”‹’–‹‘• ‰‹˜‡ ‹ –Š‡ ϐ‹”•– ƒ† •‡…‘† ’ƒ”ƒ‰”ƒ’Š•ǡ „‘–Š •Š‡‡– ƒ† rill erosion are caused by water, (A). 2. This item tests your ability to extract a piece of information from a simple data presentation. In this case, 1992 corresponds to the third bar of Figure 1.2. Sheet and rill erosion corresponds to the light-gray bottom section of the bar: 1.18 billion tons, (H). 3. ‹‰—”‡ ͳ ‰‹˜‡• †ƒ–ƒ ˆ‘” •‹š ‰ƒ•‡• ƒ– ͵ͲͲ ǡ ‹…Ž—†‹‰ Š‡Ž‹— ȋ ‡Ȍ and chlorine (Cl 2 ). The peaks (most probable molecular speed) are different, so eliminate (A). The range of the speed data is greater for He than for Cl 2 , so eliminate (D). Since the peak of He is further to the right at a greater molecular speed than the peak for Cl 2 , He molecules Šƒ˜‡ ƒ Š‹‰Š‡” ‘•– ’”‘„ƒ„Ž‡ •’‡‡† ƒ– ͵ͲͲ –Šƒ –Š‡ Ž 2 molecules, (B). 4. ……‘”†‹‰ –‘ ‹‰—”‡ ʹǡ ™‹–Š ƒ ‹…”‡ƒ•‡ ‹ –‡’‡”ƒ–—”‡ ȋˆ”‘ ͳͲͲ –‘ ͳǡͲͲͲ Ȍǡ –Š‡ ‘•– ’”‘„ƒ„Ž‡ ‘Ž‡…—Žƒ” •’‡‡† ƒŽ•‘ ‹…”‡ƒ•‡• ȋˆ”‘ ƒ’’”‘š‹ƒ–‡Ž› ͵ͲͲ ‡–‡”•Ȁ•‡…‘† –‘ ͺͲͲ Ȁ•ȌǤ Š‹• ‹• „‡•– represented in (H). None of the other graphs show an increase in most probable molecular speed as the temperature increases. 5. Less acceleration means less speed at comparable times, so the lunar photos will show images of the stone that are closer together, (A). 6. Since the stone moves faster as it drops due to acceleration, it will fall farther in each 0.1 second interval, (G).

Answers:

Return to the pages below to review each item:

1. p. 197 2. p. 197 3. p. 199 4. p. 200 5. p. 201 6. p. 202