Victory for the ACT Student Text 15e

L ESSON 1 | D ATA R EPRESENTATION • 295 It is discovered that if the experiment is repeated for an object with twice the mass, the kinetic energy obtained for every height is doubled. The slope of the new set of experiments can be obtained by doing what to the old slope? A. Multiplying by 2 B. Dividing by 2 C. Squaring D. Taking the square root

2. In the graph, if the kinetic energy is given in units of , / g cm s 2 2 : what units must the slope have? F. / g cm s : G. / g cm s 2 : H. / s cm g : J. /s g cm 2 : ^ h

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Closer Look You aren’t allowed to use a calculator on the test, which means you won’t be asked to do complicated manipulations. Any questions involving math will only require straightforward calculations. TABLES The Cambridge Edge Sometimes if you are confused by a table, it can help to quickly sketch a ‰”ƒ’Š –‘ ”‡…‘‰‹œ‡ trends. Throwback to Science Class Remember, you can only compare two trials or experiments if they differ in just one respect. For instance, if you want to study the effect of temperature on reproductive age, you would compare two trials with the same food consumption but different temperatures. Understanding the Nature of Data Items #4–5

PASSAGE II A scientist investigated the variables that affect the age at which a female of the animal species Taedi periculum ϐ‹”•– ‰‹˜‡• „‹”–ŠǤ ‘‡ ‘ˆ –Š‡ ”‡•—Ž–• ‘ˆ –Š‹• •–—†› ƒ”‡ •—ƒ”‹œ‡† ‹ –Š‡ table below.

AGE WHEN FIRST GAVE BIRTH (months)

AVERAGE FOOD INTAKE (grams)

TEMPERATURE (°C)

1 2 3 4 5 6

25 25 25 35 35 35

15 30 45 15 30 45

7 6 4 5 3 3

EXPERIMENT

Which of the following would be good animals to use for the experiment? F. Adult females G. Newborn females H. Newborn males J. Adult males

Which of the following pairs of experiments would be useful for studying the effect of temperature on the age of ϐ‹”•– „‹”–Šǫ A. Experiments 1 and 2 B. Experiments 1 and 5 C. Experiments 1 and 4 D. Experiments 2 and 6

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