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Question 241.

Choose the option that best corrects the underlined portion of the sentence:
Neither the students nor their teacher were expecting the science fair to be postponed.

1. were expecting
   2. was expecting
   3. have expected
   4. expect

Correct Answer: 2

Explanation:

With a neither…nor construction, the verb generally agrees with the subject closest to it. In this sentence, the subject nearest the verb is teacher, which is singular. Therefore, the correct verb phrase is was expecting. Choice 1 incorrectly agrees with the more distant plural noun “students.” Choice 3 changes the tense and does not fit the context, while Choice 4 uses the wrong tense and agreement. ACT English frequently tests agreement in sentences containing paired conjunctions such as “either…or” and “neither…nor.” When the two subjects differ in number, focus on the noun closest to the verb. Here, “teacher was expecting” provides the correct grammatical relationship.

Question 242.

Which sentence is the clearest and most concise revision?
The reason the meeting was canceled was because the speaker was unable to attend due to being absent.

1. The meeting was canceled because the speaker could not attend.
   2. The reason the meeting was canceled was because the speaker was absent and unable to attend.
   3. Due to the fact that the speaker was unable to attend because of being absent, the meeting was canceled.
   4. The meeting was canceled for the reason that the speaker was unable to be present in attendance.

Correct Answer: 1

Explanation:

Choice 1 expresses the complete idea directly without redundancy. The original sentence repeats the same causal relationship through “the reason…was because,” and “unable to attend due to being absent” also repeats the same concept. Choice 2 keeps much of that redundancy. Choice 3 adds the wordy phrase “due to the fact that,” while Choice 4 uses an awkward and repetitive expression, “present in attendance.” ACT English generally favors concise language when meaning and grammatical correctness are preserved. When several options communicate the same basic idea, choose the one that removes unnecessary phrases and repeated meanings. “The meeting was canceled because the speaker could not attend” is complete, clear, and efficient.

Question 243.

Choose the best punctuation for the sentence:
The museum acquired three rare objects ___ a seventeenth-century map, a silver compass, and a handwritten journal.

1. objects, a
   2. objects; a
   3. objects: a
   4. objects a

Correct Answer: 3

Explanation:

A colon is appropriate because the words before the blank form a complete independent clause: “The museum acquired three rare objects.” The items after the blank identify those three objects. Therefore, Choice 3 is correct. Choice 1 uses only a comma where stronger punctuation is needed. Choice 2 uses a semicolon, but the material after it is a list rather than a complete independent clause. Choice 4 omits punctuation and creates an awkward sentence. ACT English often tests whether a colon is being used correctly. A colon can introduce a list, explanation, example, or clarification, but the material before it must be grammatically complete. This sentence satisfies that requirement.

Question 244.

Choose the transition that best completes the paragraph:
The town added protected bicycle lanes along several major streets. More residents began commuting by bicycle during the following year. ___, officials approved plans to extend the network into additional neighborhoods.

1. Consequently
   2. In contrast
   3. Nevertheless
   4. For instance

Correct Answer: 1

Explanation:

The decision to expand the bicycle-lane network follows from the increase in bicycle commuting. Therefore, Consequently is the best transition because it signals cause and effect. “In contrast” would introduce an opposing idea, but the final sentence supports and continues the earlier development. “Nevertheless” would imply that the expansion occurred despite some contrary fact, which is not the case. “For instance” would introduce an example rather than an outcome. ACT transition questions require you to identify the logical relationship between surrounding sentences. Here, the new lanes were followed by more cycling, so officials expanded the program. That relationship is clearly one of result.

Question 245.

Which sentence best supports the writer’s goal of emphasizing how rapidly a river rose during a storm?

1. The river passes through several farming communities.
   2. The water level increased by more than 6 feet in only two hours.
   3. Several bridges cross the river near downtown.
   4. The river is popular with kayakers during the summer.

Correct Answer: 2

Explanation:

Choice 2 directly emphasizes rapid change by combining a large rise in water level with a very short time period. An increase of more than 6 feet in only two hours gives readers specific evidence of how quickly conditions changed. Choice 1 provides geographic context, Choice 3 describes nearby infrastructure, and Choice 4 discusses recreation. None of those details supports the goal of emphasizing speed. ACT rhetorical-purpose questions require choosing information that most directly accomplishes the writer’s stated objective. When the goal involves speed, size, growth, cost, or severity, numerical evidence is often the strongest choice because it provides a measurable comparison.

Question 246.

If 7x-8=48, what is the value of x?

1. 6
   2. 7
   3. 8
   4. 9

Correct Answer: 3

Explanation:

Begin with 7x-8=48. Add 8 to both sides to get 7x=56. Then divide by 7, giving x=8. Therefore, Choice 3 is correct. You can verify the result by substituting 8 back into the original equation: 7(8)-8=56-8=48. Choice 1 would produce 34, Choice 2 would produce 41, and Choice 4 would produce 55. ACT Math linear-equation questions are usually straightforward, but careful arithmetic is important. A reliable method is to undo addition or subtraction first, then undo multiplication or division, and finally check by substitution when possible.

Question 247.

A television originally costs $1,050 and is discounted by 24%. What is the sale price?

1. $252
   2. $798
   3. $840
   4. $880

Correct Answer: 2

Explanation:

A 24% discount means the buyer pays 76% of the original price. Calculate 1,0500.76=798. Therefore, the sale price is $798, Choice 2. Another method is to calculate the discount first: 1,0500.24=252, then subtract 1,050-252=798. Choice 1 is the amount saved rather than the final price. Choices 3 and 4 correspond to smaller discounts. ACT percentage questions often include the percentage-change amount as a distractor. Always identify whether the question asks for the amount of the discount or the final cost after the discount has been applied.

Question 248.

A rectangular field is 22 meters long and 14 meters wide. What is its perimeter?

1. 36 meters
   2. 72 meters
   3. 308 meters
   4. 616 meters

Correct Answer: 2

Explanation:

The perimeter of a rectangle is P=2L+2W. Substitute the dimensions: P=2(22)+2(14)=44+28=72 meters. Therefore, Choice 2 is correct. Choice 1 simply adds length and width once, which gives half the perimeter. Choice 3 is the area, calculated as 2214=308 square meters. Choice 4 doubles the area and is unrelated to perimeter. ACT geometry questions often test whether students distinguish between area and perimeter. Perimeter is the distance around a figure and uses linear units, while area measures the space inside a figure and uses square units.

Question 249.

The mean of 6 numbers is 31. Five of the numbers are 22, 27, 30, 35, and 39. What is the sixth number?

1. 31
   2. 32
   3. 33
   4. 34

Correct Answer: 3

Explanation:

If the mean of six numbers is 31, the total sum must be 316=186. Add the five known numbers: 22+27+30+35+39=153. Subtract this from the required total: 186-153=33. Therefore, the sixth number is 33, Choice 3. Choice 1 may look tempting because it equals the mean, but a missing value does not have to be equal to the average. ACT average problems are often easiest when you first convert the mean into a total sum and then subtract the values already provided.

Question 250.

A line passes through the points (3,7) and (8,22). What is the slope of the line?

1. 2
   2. 3
   3. 4
   4. 5

Correct Answer: 2

Explanation:

Use the slope formula m=y2–y1x2–x1. Substitute the coordinates: m=22-78-3=155=3. Therefore, Choice 2 is correct. A common error is to reverse the subtraction order in only the numerator or denominator. You can subtract either point from the other, but the order must remain consistent in both places. ACT coordinate geometry questions frequently test slope because it represents vertical change divided by horizontal change. Since both the x-coordinate and y-coordinate increase from the first point to the second, a positive slope is expected.

Question 251.

Read the passage and answer the question.

Passage:
For years, Elena avoided repairing household items because she assumed fixing things required specialized technical knowledge. When an old desk lamp stopped working, however, she decided to attend a repair workshop at a neighborhood center. A volunteer showed her how to inspect the cord, test the switch, and replace a damaged connector. Elena was surprised that the repair required patience more than advanced equipment. Over the next several months, she fixed a loose cabinet hinge and repaired a broken drawer handle on her own.

Which statement best describes Elena’s change in perspective?

1. She realizes that some repairs are manageable with basic skills and patience.
   2. She decides household repairs are too dangerous to attempt.
   3. She concludes that only professionals should use tools.
   4. She stops using household items that break.

Correct Answer: 1

Explanation:

Elena begins by assuming that repairs require specialized expertise, so she avoids attempting them. The workshop changes her view because she learns that a simple lamp repair can be completed by following basic diagnostic steps and working patiently. Her later success fixing other household items shows that the lesson influenced her future behavior. Choice 1 accurately captures this development. Choices 2 and 3 contradict her growing confidence, while Choice 4 is unsupported. ACT Reading questions about changes in perspective often require comparing the character’s initial assumption with later actions that demonstrate a new understanding.

Question 252.

Based on the passage in Question 251, why does the author mention that Elena later repaired a cabinet hinge and drawer handle?

1. To show that the workshop gave her confidence to apply what she learned to other repairs
   2. To prove that the lamp repair had failed
   3. To suggest that she became a professional repair technician
   4. To show that the neighborhood center closed after the workshop

Correct Answer: 1

Explanation:

The later repairs demonstrate that Elena’s change in perspective lasted beyond the workshop. She does not simply fix one lamp under supervision; she becomes confident enough to handle additional household problems independently. Choice 1 therefore best explains the function of the detail. Choice 2 contradicts the successful repair described earlier. Choice 3 overstates her development because the passage never says she became a professional. Choice 4 is completely unsupported. ACT Reading questions that ask why an author includes a detail usually focus on how that detail develops a character, supports a claim, or illustrates a theme. Here, the additional repairs provide concrete evidence of Elena’s increased confidence.

Question 253.

Read the passage and answer the question.

Passage:
Some communities are restoring native grasses along roadsides instead of mowing every area into short turf. Native grasses often have deeper roots, which can help stabilize soil and absorb water. They may also provide habitat for insects and birds. However, roadside restoration requires careful planning because drivers still need clear sight lines at intersections and curves.

What is the main idea of the passage?

1. Native roadside grasses can provide environmental benefits but must be managed with safety in mind.
   2. All roadside mowing should stop immediately.
   3. Native grasses completely prevent erosion.
   4. Roadside vegetation has no effect on wildlife.

Correct Answer: 1

Explanation:

The passage presents several potential benefits of native grasses, including soil stabilization, water absorption, and wildlife habitat. It also explains that safety remains important because vegetation cannot interfere with drivers’ visibility. Choice 1 accurately captures both parts of this balanced argument. Choice 2 is too extreme because the author does not recommend eliminating all mowing. Choice 3 exaggerates the effect of deep roots, while Choice 4 directly contradicts the statement that grasses can provide habitat. ACT main-idea questions often contain answer choices that represent only the benefits or only the limitations. The strongest choice should reflect the passage as a whole.

Question 254.

In the passage from Question 253, why does the author mention “clear sight lines at intersections and curves”?

1. To identify a safety concern that can influence how roadside vegetation is managed
   2. To show that native plants cannot grow near roads
   3. To prove that mowing is environmentally harmful in every situation
   4. To argue that drivers should avoid rural roads

Correct Answer: 1

Explanation:

The reference to sight lines provides a practical limitation on roadside restoration. Even if native grasses offer environmental benefits, vegetation cannot be allowed to become so tall that drivers have difficulty seeing approaching vehicles, pedestrians, or roadway conditions. Choice 1 correctly identifies this purpose. Choice 2 is unsupported because the passage specifically discusses native plants growing along roads. Choice 3 is too absolute, and Choice 4 is unrelated. ACT Reading often tests why authors include limitations after discussing benefits. These details show that real-world decisions usually involve balancing multiple goals rather than applying one solution everywhere without modification.

Question 255.

Which inference is best supported by the passage in Question 253?

1. Roadside vegetation plans may differ depending on the location and traffic conditions.
   2. Every roadside should use exactly the same planting design.
   3. Native grasses eliminate the need for road maintenance.
   4. Wildlife can survive only in roadside grass areas.

Correct Answer: 1

Explanation:

Because visibility must be preserved at intersections and curves, it is reasonable to infer that roadside planting plans will need to vary depending on location. Areas with fewer visibility concerns may support taller vegetation, while other areas may require shorter plants or more frequent maintenance. Choice 1 is therefore well supported. Choice 2 contradicts the need for site-specific safety planning. Choice 3 is not mentioned, and Choice 4 makes an unsupported absolute claim. ACT inference questions reward careful conclusions that logically follow from the passage. Answers using “may” or “can” are often more appropriate than universal statements using “every,” “only,” or “always.”

Question 256.

A student investigates how light intensity affects the growth of algae. Four containers receive 25%, 50%, 75%, or 100% light intensity. All other conditions remain constant. What is the independent variable?

1. Algae growth
   2. Light intensity
   3. Container volume
   4. Amount of algae at the start

Correct Answer: 2

Explanation:

The independent variable is the factor deliberately changed by the researcher. In this experiment, light intensity is varied among four levels, so Choice 2 is correct. Algae growth is the dependent variable because it is the measured response. Container volume and starting algae amount should be controlled so that differences in growth can be attributed more confidently to light intensity. ACT Science frequently tests experimental-design concepts. Remember the basic distinction: the independent variable is manipulated by the experimenter, the dependent variable is measured, and controlled variables are kept as consistent as possible to reduce alternative explanations.

Question 257.

Why should each container in Question 256 begin with the same amount of algae?

1. To prevent starting quantity from influencing the comparison of final growth
   2. To make all light intensities identical
   3. To introduce a second independent variable
   4. To guarantee identical final growth in every container

Correct Answer: 1

Explanation:

If the containers started with different amounts of algae, the final quantities could differ simply because some trials had more algae from the beginning. Keeping the starting amount constant makes it easier to compare growth caused by differences in light intensity. Choice 1 therefore correctly explains the purpose of this control. Choice 2 is incorrect because light intensity is intentionally varied. Choice 3 would weaken the experiment by adding another changing factor. Choice 4 is also incorrect because different light levels may produce different growth even when the starting amounts are identical. ACT Science often asks why experimental variables are controlled: the goal is to isolate the effect of the independent variable.

Question 258.

The algae experiment produced the following average growth values after one week:
25% light: 6 units
50% light: 12 units
75% light: 18 units
100% light: 17 units
Which conclusion is best supported?

1. Growth increased through 75% light but decreased slightly at 100%.
   2. Growth decreased steadily as light intensity increased.
   3. The greatest growth occurred at 25% light.
   4. Light intensity had no relationship with algae growth.

Correct Answer: 1

Explanation:

The data show that growth rises from 6 units at 25% light to 12 at 50% and 18 at 75%. At 100% light, growth decreases slightly to 17 units. Choice 1 accurately describes the full pattern. Choice 2 reverses the initial trend. Choice 3 contradicts the measurements because the 25% treatment produces the lowest growth. Choice 4 ignores the clear differences among treatments. ACT Science data questions often include relationships that increase to a maximum and then level off or decline. Read every data point carefully rather than assuming that more of the independent variable will always produce more of the dependent variable.

Question 259.

Scientist A argues that a decline in a frog population is mainly caused by reduced pond depth. Scientist B argues that the main cause is pesticide exposure. Which evidence would most directly support Scientist B?

1. Frog numbers decline most sharply where pesticide concentrations rise while pond depth remains relatively stable.
   2. Several ponds become shallower during dry summers.
   3. Frogs feed on insects and other small organisms.
   4. Some ponds contain more aquatic plants than others.

Correct Answer: 1

Explanation:

Scientist B proposes that pesticide exposure is the primary cause of the frog decline. Choice 1 directly supports that explanation because frog numbers decrease where pesticide concentrations increase while pond depth stays relatively unchanged. This strengthens the pesticide hypothesis and reduces reduced pond depth as the competing explanation. Choice 2 would instead support Scientist A. Choices 3 and 4 provide ecological background but do not directly test either proposed cause. ACT Science conflicting-viewpoints questions are easiest when you identify the specific variable emphasized by each scientist and then select evidence that changes one factor while holding the competing factor relatively constant.

Question 260.

A researcher tests whether a new soil additive improves plant growth. Group A receives the additive and 13 hours of light each day. Group B receives no additive and 8 hours of light each day. Group A grows taller. Why is the conclusion that the additive caused the greater growth not fully justified?

1. The two groups differed in both soil treatment and light exposure.
   2. Plant growth cannot be measured accurately.
   3. Soil additives never influence plant growth.
   4. Eight hours of light always produces more growth than thirteen hours.

Correct Answer: 1

Explanation:

The researcher changes two important variables at once. Group A receives the soil additive and also receives five more hours of light per day than Group B. Since light can strongly influence plant growth, the observed difference could result from the additive, the extra light, or a combination of both. This is a confounding-variable problem. A stronger experiment would keep light exposure equal in both groups and vary only the soil additive. Choices 2, 3, and 4 are unsupported claims. ACT Science frequently tests whether an experimental design is controlled well enough to support a causal conclusion. To make a strong cause-and-effect claim, the independent variable should be isolated while other major conditions remain as similar as possible.