ACT Past Papers with Answers

Which of the following statements about the effect of primarily of cholesterol. mulch age on the consumption of mulch by R. flavipes is consistent with the figure? As mulch age increased

Rated pe the pete e the pincho rot source of Cellulose: R. flavipes consumes the cell mem- type of mulch mulch age branes of animal cells, and the cell membranes of oak 24 weeks animal cells contain cellulose. pine bark 24 weeks oak 48 weeks plant cells, and the cell walls of plant cells consist pine bark 48 weeks primarily of cellulose. branes of animal cells, and the cell membranes of animal cells contain cholesterol. Cholesterol; R. flavipes consumes the cell walls of plant cells, and the cell walls of plant cells consist

4 cm

Suppose that a scientist wants to transport a lyophi- lized sample of Strain E elementary bodies. Based on the results of Experiment 1, which of the following combinations of temperature and transportation time would most likely ensure the greatest percent survival of the elementary bodies? 4°C and I week

Consider the rating system in the table below for the percent survival of elementary bodies after lyophilization. Rating Excellent Good Роог Percent survival > 90% ≥ 30% and ≤ 90% < 30% Based on this table, what is the total number of tubes in Experiment 1 that contained samples having a poor percent survival? 4 6 DARE 4 Passage III When an object is submerged in a fluid, the object dis- places a volume of fluid equal to the object's submerged volume. The fluid exerts an upward buoyant force on the object that is equal in magnitude to the weight of the dis- placed fluid. The object floats if the buoyant force equals the object's weight. A group of students conducted 2 studies on buoyant forces using 3 fluids-water, Fluid A, and Fluid B naving densities of 1.0 g/cm', 1.25 g/cm', and 1.50 g/cm'. respectively. Study 1 tainer of stater and measured the long linder in an - measured the length of the portion of the cylinder that was submerged. They then repeated this rocedure with a container of Fluid A and a container o -luid B (see Figure 1). 4 T

Source question 16. Refer to the source image.

Suppose that in Study I the students had placed the cylinder in a container of fluid having a density of

Suppose that in Study 2 the students had tested a stone having the same weight as Stone Z but a larger volume than Stone Z. Which of the following statements about the buoyant force on this submerged stone would be correct? The buoyant force on this stone in: Fluid A would have been less than 1.18 N. force on this stone in Fluid A.

Assume that Atlantic Ocean water has a density of

If a trial had been performed with 60 mL of NaCIO solution and 40mL of Nal solution, T, would most likely have been: between 25.5°C and 29.0°C

In each trial, the total volume of solution poured into the cup was: 25 mL. 50 mL. 75 mL.

Consider the trial for which the volume of NaCIO was 4 times as great as the volume of Nal. For this trial, Tr was:

5°C

According to Figure 2, at 300 MPa, the solubility of CO, in rhyolite magma is closest to 2,000 ppm at which of the following temperatures? 850°C

6°C 4

Based on Figure 1, at 1,150°C and 150 MPa, the solu- bility of CO_ in leucitite magma is approximately how much greater than or less than the solubility of CO, in rhyolite magma? 1,750 ppmw less 4

Consider the solubility of CO, in rhyolite magma at 750°C and 200 MPa, as shown in Figure 2. According to Figure 3, this rhyolite magma has a weight percent of HO closest to which of the following?

Source question 34. Refer to the source image.

Consider both the interval of time represented in Fig- ures 1 and 3 and the reason that, according to Hypothe- sis 2, the line of sight from Earth to Mars drifts over time. Is the top portion of Figure 3 consistent with that as having completed a greater percentage of its revolution around the Sun than is Mars. as having completed a greater percentage of its revolution around the Sun than is Mars. as having completed a greater percentage of its revolution around the Sun than is Mars. No; Earth is shown as having the larger orbit and as having completed a greater percentage of its revolution around the Sun than is Mars.

Based on Figure 1, as viewed from Earth, for approxi- mately how many days between July 2005 and Febru- ary 2006 did Mars move retrograde? 30 70 150 220 4

A supporter of Hypothesis 1 and a supporter of Hypothesis 2 would both be likely to agree with which of the following statements? When viewed from Earth. if a planet appears to be moving prograde, that planet is actually moving: system. counterclockwise around the central body in the solar system.

Based on Figures 1 and 3, if Hypothesis 2 is correct, which of the following figures most likely shows the positions of Earth and Mars on November 7, 2005 ?

Can Hypothesis 2 explain why Venus occasionally appears to move retrograde? planets that are closer to the Sun than Earth is. planets that are farther from the Sun than Earth is. of planets that are closer to the Sun than Earth is. No; Hypothesis 2 does not account for the motion of planets that are farther from the Sun than Earth is. END OF TEST 4 STOP! DO NOT RETURN TO ANY OTHER TEST. 49 ACT-COT Scoring Keys for Form C01 Use the scoring key for each test to score your answer document for the multiple-choice tests. Mark a "1" in the blank for each question you answered correctly. Add up the numbers in each reporting category and enter the total number correct for each reporting category in the blanks provided. Also enter the total number correct for each test in the blanks provided. The total number correct for each test is the sum of the number correct in each reporting category. Test 1: English-Scoring Key Reporting Category* Key POW KLA CSE 1. 39. 40. 41. Reporting Category* Key POW KLA C F A CSE *Reporting Categories POW = Production of Writing KLA = Knowledge of Language CSE = Conventions of Standard English - - - Number Correct (Raw Score) for: Production of Writing (POW) Knowledge of Language (KLA) Conventions of Standard English (CSE) Total Number Correct for English Test (POW + KLA + CSE) (23) (12) (40) (75) 50 Test 2: Mathematics-Scoring Key Reporting Category* PHM N A F G S Key E IES MDL Key N Reporting Category* PHM A F G S IES MDL 1. 2. 3. 4. 5. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 1 13. 14. 15. 16. 17. 18. 19. 20. 23 25. 27. 28. A 47. 48 49 50. 51. 53. Combine the totals of these columns and put in the blank for PHM in the box below. *Reporting Categories PHM = Preparing for Higher Math N = Number & Quantity A = Algebra F = Functions G = Geometry S = Statistics & Probability ES = Integrating Essential Skills MDL = Modeling Number Correct (Raw Score) for: Preparing for Higher Math (PHM) (N + A + F + G + S) Integrating Essential Skills (IES) Total Number Correct for Mathematics Test (PHM + IES) Modeling (MDL) (Not included in total number correct for mathematics test raw score) (35) (25) (60) (24) Test 3: Reading-Scoring Key Key KID Reporting Category® CS IKI 11. 12. 5. 6. 17. 8. 9. 20 21 22. 23. 24. 25. 26. 27. 28. 29 30. 31. 32. 33 35. 36. 37. 38. 39. 40. Key B Test 4: Science-Scoring Key Key IOD Reporting Category* SIN EMI Key 21. 23 24. - KID Reporting Category* CS IKI IOD Reporting Category* SIN EMI 52 •Reporting Categories KID = Key Ideas & Details CS = Craft & Structure IKI = Integration of Knowledge & Ideas Number Correct (Raw Score) for: Key Ideas & Details (KID) Craft & Structure (CS) Integration of Knowledge & Ideas (IKI) Total Number Correct for Reading Test (KID + CS + IKI) (23) (11) (6) (40) *Reporting Categories IOD = Interpretation of Data SIN = Scientific Investigation EMI = Evaluation of Models, Inferences & Experimental Results Number Correct (Raw Score) for: Interpretation of Data (IOD) Scientific Investigation (SIN) Evaluation of Models, Inferences & Experimental Results (EMI) Total Number Correct for Science Test (IOD + SIN + EMI (16) (10) (14) (40) Explanation of Procedures Used to Obtain Scale Scores from Raw Scores On each of the four tests on which you marked any responses, the total number of correct responses yields a raw ACT Test C01 score. Use the table below to convert your raw scores to scale scores. For each test, locate and circle your raw score or the English range of raw scores that includes it in the table below. Then, read across to either outside column of the table and circle the Mathematics scale score that corresponds to that raw score. As you determine your scale scores, enter them in the blanks provided Reading on the right. The highest possible scale score for each test is