AccelePrep for the ACT Test 2nd Edition Student Text

C HAPTER 11 | H YPER P REP S CIENCE • 215

4. In Experiment 2, the normal concentration of Antibiotic II (Plate B) had no effect on bacterial growth; therefore, both Plate B (Antibiotic II) and Plate C (water) were completely cloudy with bacterial growth.  š’‡”‹‡– ͵ǡ –Š‡…‘…‡–”ƒ–‹‘ ‘ˆ –‹„‹‘–‹…™ƒ• †‘—„Ž‡† and Plate B then had a clear 2” area around the antibiotic-soaked disk, indicating the inhibition of bacterial growth. Therefore, the ‡ˆˆ‡…–‹˜‡‡•• ‘ˆ –‹„‹‘–‹…ƒ– ʹʹι †‡’‡†• ‘ ‹–•…‘…‡–”ƒ–‹‘ǡ ȋ ȌǤ 5. This question underscores the importance of looking at details, such as temperature. Failure to do this would make you draw the faulty conclusion of using all three experiments, when only Experiment 1 is appropriate. Since the antibiotics would be prescribed for internal —•‡ǡ –Š‡‹” ‡ˆˆ‡…–• ƒ– „‘†› –‡’‡”ƒ–—”‡ ȋ͵͹ι Ȍ ƒ”‡ ‘•– ‹’‘”–ƒ– –‘ consider. Experiment 1 showed that both Antibiotics I and II work ‡“—ƒŽŽ› ™‡ŽŽ ‹ –Š‡ •ƒ‡…‘…‡–”ƒ–‹‘• ƒ– ͵͹ι ȋ„‘†› –‡’‡”ƒ–—”‡ȌǤ Thus, the result is the same, regardless of which one is used. The correct answer is (A).

POWER PRACTICE 2 DIRECTIONS: The passage below is followed by several items. After reading the passage, choose –Š‡ „‡•– ƒ•™‡” –‘ ‡ƒ…Š ‹–‡Ǥ ‘— ƒ› ”‡ˆ‡” –‘ –Š‡ ’ƒ••ƒ‰‡ ƒ• ‘ˆ–‡ ƒ• ‡…‡••ƒ”›Ǥ ‘— ƒ”‡ permitted the use of a calculator. Answers are ‘ ’ƒ‰‡ ͵ͳͳǤ A useful property of lenses is their ability to form images of objects due to the refraction of light as it passes from one medium to another. If the object and image sizes are h and h’ ǡ ”‡•’‡…–‹˜‡Ž›ǡ –Š‡ ƒ‰‹ϐ‹…ƒ–‹‘ ‘ˆ –Š‡ Ž‡• is the ratio of the image size to object size, or: h h' o i M (Equation 1) where o represents the distance between the center of the lens and the object and i represents the distance „‡–™‡‡ –Š‡…‡–‡” ‘ˆ –Š‡ Ž‡• ƒ† –Š‡ ‹ƒ‰‡Ǥ Š‡ ƒ‰‹ϐ‹…ƒ–‹‘ ‹• ”‡’”‡•‡–‡† ƒ• ƒ ‡‰ƒ–‹˜‡ —„‡” –‘ ‹†‹…ƒ–‡ that an inverted image has a negative height and an upright image has a positive height.

Object Distance ( o )

Figure 1