Workspace▸ Science▸ Test 39
← Back to Science
OFFICIAL ACT Form Z18 · April 2023

Science

27 questions ~9 min recommended
⏱ 00:00
Score
—
=== Enzyme Activity ===
Note: Assume that, for this range of pH values, if no data is shown for a type of enzyme, its relative activity is 0%.

=== Quantum States ===
In an atom, an electron exists in one of several quantum states (configurations). Each quantum state can be specified by a set of numbers.

=== P. richtersi Experiment ===
An experiment was conducted to determine whether exposure to the high levels of ionizing radiation...

=== Nitrobenzene Reaction ===
Nitrobenzene (C6H5NO2) is a molecule consisting of a nitro group (−NO2) attached to a benzene ring...

=== Passage V ===
Manure mixed with water, known as a slurry, is spread on top of a soil to provide additional plant nutrients. The slurry covering alters how rain erodes the ground surface. A study was done on a particular soil with and without slurry on top to determine the amount of runoff (water and sediment that runs off the surface) and the concentration of sediment in the runoff during a simulated rainfall event...

1. According to Figure 1, at a pH of 6, which types of enzymes have a relative activity of less than 40%?

2. According to Figure 1, as the pH increases from 7 to 9, the relative activity for amylase:

3. Based on Table 1 and Figure 1, at a pH of 7, the relative activity for the type of enzyme that catalyzes the breakdown of triglyceride has a relative activity of approximately 50% at which of the following pH values?

4. Based on the figure, which of the following combinations of n, j, and orbital type does NOT correspond to a quantum state?

5. Based on the figure, as the value of n increases, the number of possible values for j:

6. According to the figure, for n=3, how many quantum states are possible?

7. Based on the figure, the quantum states associated with g-type orbitals would most likely have energies that are:

8. Based on the description of the experiment, in what order were the following 3 steps performed?

9. Were the P.richtersi with the smallest average percent survival transported into Earth orbit or did they remain on Earth, and were they kept in leaf litter or on filter paper?

10. In which state would an individual P. richtersi more likely require a greater number of calories per minute, dormant or active?

11. Which student indicated that the donation of electrons to the benzene ring results in a relatively fast reaction?

12. Which of the following elements is NOT present in the reaction represented in Figure 1?

13. Consider the structure of methylbenzene shown below: which carbon atom does Student 1 predict a Br atom would bond with?

14. Suppose the study had been repeated with the flumes having a 10% slope. Would the total runoff volume collected from a flume over the first three 5 min periods more likely have been greater than or less than that for the same periods in the original study?

15. Based on the results of the study, was the average runoff over the entire 45 min of rainfall for the flume with the slurry layer greater than or less than that for the flume without the slurry layer, and was the average sediment concentration over the entire 45 min of rainfall for the flume with the slurry layer greater than or less than that for the flume without the slurry layer?

16. Consider the information provided about bulk density. Based on that information, would the bulk density of 1.0 m3 of the soil in the flume without a slurry layer more likely have been greater than 1,400 kg/m3 or less than 1,400 kg/m3 at the end of the 45 min of rainfall?

17. All the particles in the dried soil that passed through the screen had a diameter of:

18. According to the results of the study, the greatest difference between the sediment concentrations of the samples collected at the same time from the 2 flumes was closest to which of the following?

19. In the study, what was the total depth of water, in mm, produced by a sprinkler over the 45 min of rainfall?

20. Which of the following expressions best represents the volume of material in the flume with the slurry layer just before the rainfall began?

21. Which of the following statements best summarizes the results of Experiment 1?

22. Which pendulum tested in Experiment 1, if any, was released with the greatest gravitational potential energy?

23. Consider the results of Experiments 2 and 3. A comparison of Student 1’s data with Student 2’s data indicates that the simple pendulum equation becomes less accurate as the:

24. Suppose that in Experiment 2, Student 2 had obtained a period of 2.60 s for a pendulum having a mass of 100g. The length of this pendulum would most likely have been closest to which of the following values?

25. In order for the students to have completed Experiments 1−3 as described, what was the minimum number of different spheres necessary, and what was the minimum number of different strings necessary?

26. Consider the vertical axes of Figures 1, 2, and 3. The greater the resolution of a given axis, the smaller the differences in time that can be clearly shown on that axis. The vertical axis of which figure, if any, is drawn with the greatest resolution?

27. In which experiment(s), if any, was this pendulum tested?

Next test →
Jump to