Workspace Science Test 27
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OFFICIAL ACT Form 67C · June 2009

Science

34 questions ~9 min recommended
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1. Based on the results of Study 1, the highest percent of finches on Island B and Island C had a beak depth of:

2. During which of the following years were small seeds likely most abundant on Island B?

3. Study 1 differed from Study 2 in which of the following ways?

4. It is most likely that the researchers tagged the birds that they captured during Study 1 to:

5. Based on the results of Study 2, would a finch with a beak depth of 9.4 mm or a finch with a beak depth of 9.9 mm more likely have had a greater chance of survival during 1977?

6. According to Figure 1, over the 12-month period, the monthly precipitation at the urban site was maximum in February and minimum in July. According to Figures 2 and 3, the wet deposition of which ion was also maximum in February and minimum in July?

7. Based on the results of Study 1, the average monthly wet deposition for Cu2+ over the 12-month period was:

8. Is the statement 'The values for Cl− wet deposition were greater during the winter and early spring when road salt is typically applied' supported by the results of Study 2?

9. Suppose there had been no precipitation during 1 entire month of the 12-month period. Based on the information provided, during that month there would have been:

10. The percent of Earth’s surface covered by high clouds in January 1987 was closest to which of the following?

11. Based on Table 1, a cosmic ray flux of 440,000 particles/m2/hr would correspond to a cover of low clouds that is closest to which of the following?

12. Is the statement 'The monthly average cover of low clouds is more directly correlated with cosmic ray flux than is the monthly average cover of high clouds' consistent with Figures 1 and 3?

13. In Experiment 1, the sample solution was yellow at which of the following values for the volume of titrant added?

14. In Experiment 2, the sample solution was neutral at which of the following values for the volume of titrant added?

15. In Experiment 1, if 2.30 mL of titrant had been added to the sample solution, the conductivity would most likely have been:

16. In Experiments 1 and 2, the probe that was placed in the sample solution most likely did which of the following?

17. A chemist claimed that in Experiment 2, the pH of the sample solution was greater at a value of 0.2 mL of titrant added than at a value of 1.8 mL of titrant added. Do the results of Experiment 2 support this claim?

18. Based on Student 2’s discussion, Algol B is part of the present Algol system because of which of the following forces exerted on Algol B by the original Algol system?

19. Based on Student 1’s discussion and Fact 4, while matter flowed between Algol A and Algol B, Algol B produced the majority of its energy by fusing:

20. Suppose that chemical composition is uniform among stars formed from the same cloud of gas and dust, but that chemical composition varies among stars formed from different clouds of gas and dust. Student 2 would most likely agree with which of the following statements comparing the chemical compositions of the stars in the present-day Algol system at the time they formed?

21. If the mass of the Sun is 2.0 × 10^30 kg, what is the mass of Algol C?

22. Which of the following statements best explains why the reaction described in Fact 3 requires a high temperature and pressure?

23. Based on Fact 5 and Student 1’s discussion, which of the 3 stars in the Algol system, if any, was most likely the first to become an MS star?

24. Based on Fact 5, would Student 2 agree that by the time Algol A stops being an MS star, Algol A will have spent as much time being an MS star as Algol B spent being an MS star?

25. Based on Figure 2, if 13 g of Kr had been added to the 6 L vessel, the pressure would have been:

26. Suppose the experiments had been repeated, except with a 5 L vessel. Based on Figures 1 and 2, the pressure exerted by 7 g of CO2 would most likely have been:

27. Based on Figures 1 and 2, for a given mass of O2 at 22°C, how does the pressure exerted by the O2 in a 6 L vessel compare to the pressure exerted by the O2 in a 3 L vessel? In the 6 L vessel, the O2 pressure will be:

28. Which of the following best explains why equal masses of O2 and CO2 at the same temperature and in the same-size vessel had different pressures? The pressure exerted by the O2 was:

29. Suppose the experiment involving O2 and the 6 L vessel had been repeated, except at a room temperature of 14°C. For a given mass of O2, compared to the pressure measured in the original experiment, the pressure measured at 14°C would have been:

30. According to the figure, which of the following is closest to the lowest frequency that can be heard by a human being?

31. As humans age, it is common for selective hearing loss to occur at high sound frequencies. Which of the following figures best illustrates this loss?

32. Based on the figure, a sound of a given frequency will have the highest intensity for which of the following sets of conditions? Sound is passing through:

33. A student hypothesized that sounds of any intensity at a frequency of 105 Hz would be painful for humans to hear. Do the data in the figure support this hypothesis?

34. Based on the figure, does S depend on the frequency of a sound wave of a given intensity?