Free ACT Relationships and Sequence practice questionsEnhanced ACT, 2026 format
Sequence of events, comparisons, and cause-and-effect relationships stated in the passage, including what happened first or last.
Answer each question, then read why the right answer is right and why the tempting one is wrong.
Question 1
Reading
INFORMATIONAL: This passage is adapted from an essay about the history of public libraries.
The first public library I ever loved was a converted fire station. The engine bay had become the children's room; the brass pole was still there, capped and polished, and a hand-lettered sign explained that it was not to be climbed. I did not know then that the building was an accident of municipal thrift — that the town had needed somewhere to put its books and had happened to own an empty fire station — but I understood, in the way children understand things without words, that a library was a place where something had been repurposed for the public good.
That intuition was not far from the truth. The American public library movement of the nineteenth century was, at bottom, an argument about what a town owed its citizens. Before roughly 1850, most libraries in the United States were subscription libraries: members paid an annual fee, and the collection belonged to them collectively. The idea that a town should tax everyone to buy books that anyone might borrow struck many people as an overreach, or a charity, or both. Boston's decision in 1848 to fund a library from public money was contested for years, and the opponents' arguments were not foolish. Why should a farmer who never read pay for novels borrowed by a clerk who did?
The answer that carried the day was not about pleasure but about self-government. A republic, the argument went, depended on citizens who could inform themselves, and information cost money. A public library socialized that cost the way a public school socialized the cost of literacy. The two institutions were often defended in the same breath, and it is no accident that the great wave of library building between 1890 and 1920 coincided with the expansion of compulsory schooling. The library was where the education the school had begun was supposed to continue, for free, for life.
Andrew Carnegie, whose money built more than 1,600 American library buildings in those years, understood this perfectly and added a condition that reshaped the institution. He would pay for the building, but the town had to promise, by ordinance, to fund the library's operation at ten percent of the construction cost every year. Many towns balked; some accepted the building and then quietly underfunded it. But the requirement did something subtle. It converted a gift into an obligation. A Carnegie library was not a monument a millionaire had left behind; it was a bill the town had agreed to pay, forever, on behalf of readers not yet born.
I think about that bargain when I hear the library described, as it often is now, as a warm building where people who have nowhere else to go can sit. That description is accurate and is offered, usually, as a criticism, as though the presence of the unhoused in the reading room were a symptom of the institution's decline from some purer mission. But the purer mission never existed. The library was always the place a town set aside for the people it could not otherwise account for: the clerk who wanted novels, the immigrant who wanted English, the child in the engine bay who wanted to know why the pole could not be climbed. The building changes hands. The argument does not.
According to the passage, Andrew Carnegie's condition for funding a library building required a town to:
Question 2
Reading
INFORMATIONAL: This passage is adapted from an article about how the history of earthquakes is read out of lake sediment.
Seismometers have been recording ground motion for roughly 120 years. That is an impressive archive by the standards of most instruments and a useless one for the question geologists most want to answer, because a fault capable of a damaging rupture may go three or four centuries between them. An instrumental record shorter than a single recurrence interval cannot say whether a fault is overdue, or even whether it is active. Extending the record means finding something that wrote itself down.
Deep lakes turn out to have done so. Fine sediment settles on a lake floor in thin, regular layers, and in a lake that stratifies each year the layers are annual and countable, like tree rings. Strong shaking interrupts that quiet accumulation. It destabilizes the sediment piled on the lake's steep flanks and sends it down as a dense slurry, which spreads across the flat basin floor and settles out with the coarsest grains at the bottom and the finest at the top. The result is a graded bed, a few centimeters thick, wedged between ordinary layers that look nothing like it. A core pulled from the basin floor reads as a stack of quiet centuries punctuated by these intrusions.
Dating them is the first difficulty. Where annual layers are preserved, a bed's age can be had by counting down to it, which is precise but only as good as the layers are continuous. Elsewhere, plant fragments in the sediment can be radiocarbon dated. Both methods accumulate error with depth, so a bed three thousand years down may be placed only to within about a century — adequate for estimating how often the fault ruptures, and not nearly adequate for matching a bed to an event in a written chronicle.
The second difficulty is that not every graded bed is an earthquake. A flood, a severe storm, or a fast spring melt can also dump sediment down a slope, and the bed it leaves looks much the same in a single core. Two tests separate the causes, and both depend on collecting more than one core. Shaking arrives everywhere in the basin at once, so an earthquake bed appears at the same level in cores taken from separate sub-basins, including sub-basins that no stream enters. A flood bed, by contrast, is thickest near the mouth of the stream that delivered it and thins with distance, and it may be absent altogether from a sub-basin on the far side of a sill.
A third limitation has resisted every attempt to solve it. A graded bed records that shaking crossed the threshold needed to destabilize the slope. It does not record by how much. Researchers hoped bed thickness might serve as a proxy for magnitude, but thickness turns out to depend mainly on how much loose sediment had gathered on the flanks since the last event, so a moderate shock after a long quiet interval can leave a thicker bed than a severe one that follows soon after. The archive counts earthquakes well and sizes them badly.
What the method has delivered is nonetheless hard to get any other way. Along one well-studied fault, cores from four lakes contain beds that recur at intervals of two to four centuries over the past six thousand years, and the most recent bed is 480 years old — a longer gap than any other in the record. That is a real and useful statement, and it is also weaker than it sounds. A recurrence range describes what a fault has done. It is not a schedule.
According to the passage, an earthquake bed can be distinguished from a flood bed by:
Question 3
Reading
INFORMATIONAL: Passage A and Passage B are adapted from essays on how ruined historic buildings should be treated.
Passage A
A building is not a design; it is a deposit. Every repair, every change of use, every fire and cheap patch after the fire has left a mark in the fabric, and those marks are the only evidence we have of how the building was actually lived in. Drawings record what an architect meant. Only the stone records what happened next.
This is why restoration is a form of destruction that presents itself as care. To return a roofless hall to the state of 1610 is to decide that the following four centuries were noise, and then to remove them. The decision is rarely stated so plainly, because it is usually taken piecemeal: a wall is rebuilt because it is unsafe, a floor is replaced because visitors need somewhere to stand, and each step is defensible while the sum of them leaves a new building wearing an old name.
The alternative is unglamorous and available. Stabilize what stands. Shelter it from water, which does nearly all the damage. Consolidate a wall head so it stops shedding stones, and stop there. A visitor to such a place sees a ruin, and a ruin is a legible thing: the line where a vanished floor met the wall, the blocked door, the soot above a hearth that has not been swept for two hundred years. None of that survives a good restoration.
I am not arguing that ruins should be left to fall. I am arguing that the point of intervening is to slow loss, not to supply an appearance.
Passage B
The case against reconstruction rests on a view of buildings as documents, and it is a view held almost entirely by people who read documents for a living. To everyone else, a roofless hall with a mown lawn inside it is not legible; it is a puzzle with the answer withheld. Ask visitors leaving such a site what the room was for and they will not know, because the thing that would have told them — the height of the ceiling, the direction of the light, the sound of a voice in the space — is exactly what has been allowed to disappear.
Reconstruction has a bad reputation earned by bad practice. Nineteenth-century restorers invented freely, and their inventions are now indistinguishable from the fabric they replaced. But that is an argument about method, not about aim. Where measured drawings, photographs, salvaged fittings, and archaeological survey establish what a room was, rebuilding it from that evidence is not invention, and the resulting space teaches something a wall stub cannot.
There is also the plain matter of use. A building that houses a library, a court, or a school is inspected, heated, repaired, and paid for. A consolidated ruin is a maintenance liability with no constituency but specialists, and the record shows what happens to such places when a budget tightens. Use is not a threat to a historic building. It is the only thing that has ever kept one standing.
The honest requirement is not that we refrain from rebuilding. It is that we publish what we knew, what we inferred, and what we guessed, and that the rebuilt work be identifiable as ours to anyone who looks for it.
According to Passage A, what is lost when a ruin is restored?
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