ACT ACT Reading Practice Test 2025

Read the following passage and answer the questions that follow.

In the decades following the Civil War, the American West underwent a transformation so rapid that contemporaries struggled to comprehend its scale. The Homestead Act of 1862 promised 160 acres of public land to any citizen willing to cultivate it for five years, and hundreds of thousands answered the call. Yet the image of the self-sufficient homesteader, so central to the national mythology, obscured a more complicated reality. Rainfall west of the 100th meridian was scarce, and the arid soil resisted the farming techniques that had sustained families in the humid East. Many settlers, lacking capital for irrigation equipment or drought-resistant seed, abandoned their claims within three years.

Railroad companies, which had received vast land grants from the federal government, played an outsized role in shaping settlement patterns. They advertised aggressively in Eastern cities and across Europe, distributing pamphlets that painted the Plains as a boundless garden. The railroads’ motives were transparent: every new farm generated freight revenue for grain shipments. Towns sprang up at intervals dictated not by geography or water supply but by the spacing of rail depots. When the rains failed — as they inevitably did — these towns withered as quickly as they had grown.

Historians have since debated whether the Homestead Act was a genuine effort at democratic land distribution or merely a mechanism for transferring public resources to corporate interests. The evidence suggests it was both. The act did enable thousands of families to acquire land they could never have afforded otherwise, yet the ultimate beneficiaries were often the railroads, land speculators, and cattle barons who consolidated the abandoned homesteads into vast holdings.

Which of the following best states the main idea of the passage?

Read the following passage and answer the questions that follow.

In the decades following the Civil War, the American West underwent a transformation so rapid that contemporaries struggled to comprehend its scale. The Homestead Act of 1862 promised 160 acres of public land to any citizen willing to cultivate it for five years, and hundreds of thousands answered the call. Yet the image of the self-sufficient homesteader, so central to the national mythology, obscured a more complicated reality. Rainfall west of the 100th meridian was scarce, and the arid soil resisted the farming techniques that had sustained families in the humid East. Many settlers, lacking capital for irrigation equipment or drought-resistant seed, abandoned their claims within three years.

Railroad companies, which had received vast land grants from the federal government, played an outsized role in shaping settlement patterns. They advertised aggressively in Eastern cities and across Europe, distributing pamphlets that painted the Plains as a boundless garden. The railroads’ motives were transparent: every new farm generated freight revenue for grain shipments. Towns sprang up at intervals dictated not by geography or water supply but by the spacing of rail depots. When the rains failed — as they inevitably did — these towns withered as quickly as they had grown.

Historians have since debated whether the Homestead Act was a genuine effort at democratic land distribution or merely a mechanism for transferring public resources to corporate interests. The evidence suggests it was both. The act did enable thousands of families to acquire land they could never have afforded otherwise, yet the ultimate beneficiaries were often the railroads, land speculators, and cattle barons who consolidated the abandoned homesteads into vast holdings.

Based on the passage, it can be reasonably inferred that the railroad companies distributed pamphlets portraying the Plains as a "boundless garden" primarily in order to:

Read the following passage and answer the questions that follow.

In the decades following the Civil War, the American West underwent a transformation so rapid that contemporaries struggled to comprehend its scale. The Homestead Act of 1862 promised 160 acres of public land to any citizen willing to cultivate it for five years, and hundreds of thousands answered the call. Yet the image of the self-sufficient homesteader, so central to the national mythology, obscured a more complicated reality. Rainfall west of the 100th meridian was scarce, and the arid soil resisted the farming techniques that had sustained families in the humid East. Many settlers, lacking capital for irrigation equipment or drought-resistant seed, abandoned their claims within three years.

Railroad companies, which had received vast land grants from the federal government, played an outsized role in shaping settlement patterns. They advertised aggressively in Eastern cities and across Europe, distributing pamphlets that painted the Plains as a boundless garden. The railroads’ motives were transparent: every new farm generated freight revenue for grain shipments. Towns sprang up at intervals dictated not by geography or water supply but by the spacing of rail depots. When the rains failed — as they inevitably did — these towns withered as quickly as they had grown.

Historians have since debated whether the Homestead Act was a genuine effort at democratic land distribution or merely a mechanism for transferring public resources to corporate interests. The evidence suggests it was both. The act did enable thousands of families to acquire land they could never have afforded otherwise, yet the ultimate beneficiaries were often the railroads, land speculators, and cattle barons who consolidated the abandoned homesteads into vast holdings.

As it is used in the second paragraph, the word "transparent" most nearly means:

Read the following passage and answer the questions that follow.

In the decades following the Civil War, the American West underwent a transformation so rapid that contemporaries struggled to comprehend its scale. The Homestead Act of 1862 promised 160 acres of public land to any citizen willing to cultivate it for five years, and hundreds of thousands answered the call. Yet the image of the self-sufficient homesteader, so central to the national mythology, obscured a more complicated reality. Rainfall west of the 100th meridian was scarce, and the arid soil resisted the farming techniques that had sustained families in the humid East. Many settlers, lacking capital for irrigation equipment or drought-resistant seed, abandoned their claims within three years.

Railroad companies, which had received vast land grants from the federal government, played an outsized role in shaping settlement patterns. They advertised aggressively in Eastern cities and across Europe, distributing pamphlets that painted the Plains as a boundless garden. The railroads’ motives were transparent: every new farm generated freight revenue for grain shipments. Towns sprang up at intervals dictated not by geography or water supply but by the spacing of rail depots. When the rains failed — as they inevitably did — these towns withered as quickly as they had grown.

Historians have since debated whether the Homestead Act was a genuine effort at democratic land distribution or merely a mechanism for transferring public resources to corporate interests. The evidence suggests it was both. The act did enable thousands of families to acquire land they could never have afforded otherwise, yet the ultimate beneficiaries were often the railroads, land speculators, and cattle barons who consolidated the abandoned homesteads into vast holdings.

According to the passage, many homesteaders abandoned their claims within three years primarily because:

Read the following passage and answer the questions that follow.

In the decades following the Civil War, the American West underwent a transformation so rapid that contemporaries struggled to comprehend its scale. The Homestead Act of 1862 promised 160 acres of public land to any citizen willing to cultivate it for five years, and hundreds of thousands answered the call. Yet the image of the self-sufficient homesteader, so central to the national mythology, obscured a more complicated reality. Rainfall west of the 100th meridian was scarce, and the arid soil resisted the farming techniques that had sustained families in the humid East. Many settlers, lacking capital for irrigation equipment or drought-resistant seed, abandoned their claims within three years.

Railroad companies, which had received vast land grants from the federal government, played an outsized role in shaping settlement patterns. They advertised aggressively in Eastern cities and across Europe, distributing pamphlets that painted the Plains as a boundless garden. The railroads’ motives were transparent: every new farm generated freight revenue for grain shipments. Towns sprang up at intervals dictated not by geography or water supply but by the spacing of rail depots. When the rains failed — as they inevitably did — these towns withered as quickly as they had grown.

Historians have since debated whether the Homestead Act was a genuine effort at democratic land distribution or merely a mechanism for transferring public resources to corporate interests. The evidence suggests it was both. The act did enable thousands of families to acquire land they could never have afforded otherwise, yet the ultimate beneficiaries were often the railroads, land speculators, and cattle barons who consolidated the abandoned homesteads into vast holdings.

The primary purpose of the third paragraph is to:

Read the following passage and answer the questions that follow.

The octopus has long captivated scientists with its remarkable intelligence, but only in recent years have researchers begun to appreciate the full extent of its cognitive abilities. Unlike vertebrates, whose neurons are concentrated in the brain, the octopus distributes roughly two-thirds of its 500 million neurons across its eight arms. Each arm can taste, touch, and make decisions semi-independently — an arrangement so foreign to the vertebrate body plan that some biologists describe the octopus as "eight animals in one."

Laboratory experiments have demonstrated that octopuses can solve mazes, unscrew jars from the inside, and distinguish individual human faces — skills that require learning and memory. More provocatively, aquarium keepers report anecdotal evidence of what appears to be play: octopuses have been observed squirting jets of water at floating bottles, seemingly for amusement rather than any survival purpose. Play behavior, once considered exclusive to mammals and some birds, challenges fundamental assumptions about the relationship between brain structure and consciousness.

The evolutionary implications are profound. The last common ancestor of octopuses and humans lived approximately 600 million years ago — a simple, worm-like creature with a minimal nervous system. Complex cognition, it appears, evolved independently along radically different biological pathways. This phenomenon, known as convergent evolution, suggests that intelligence is not a singular achievement of the vertebrate lineage but a solution that natural selection has discovered more than once.

Yet the octopus’s intelligence comes with a paradox. Despite their sophisticated problem-solving abilities, octopuses live only one to two years. They cannot transmit learned behavior to offspring; each generation must discover the world anew. This short lifespan raises a question that biologists are still struggling to answer: why would natural selection favor such an expensive nervous system in an animal that barely survives long enough to use it?

Which of the following best describes the central theme of the passage?

Read the following passage and answer the questions that follow.

The octopus has long captivated scientists with its remarkable intelligence, but only in recent years have researchers begun to appreciate the full extent of its cognitive abilities. Unlike vertebrates, whose neurons are concentrated in the brain, the octopus distributes roughly two-thirds of its 500 million neurons across its eight arms. Each arm can taste, touch, and make decisions semi-independently — an arrangement so foreign to the vertebrate body plan that some biologists describe the octopus as "eight animals in one."

Laboratory experiments have demonstrated that octopuses can solve mazes, unscrew jars from the inside, and distinguish individual human faces — skills that require learning and memory. More provocatively, aquarium keepers report anecdotal evidence of what appears to be play: octopuses have been observed squirting jets of water at floating bottles, seemingly for amusement rather than any survival purpose. Play behavior, once considered exclusive to mammals and some birds, challenges fundamental assumptions about the relationship between brain structure and consciousness.

The evolutionary implications are profound. The last common ancestor of octopuses and humans lived approximately 600 million years ago — a simple, worm-like creature with a minimal nervous system. Complex cognition, it appears, evolved independently along radically different biological pathways. This phenomenon, known as convergent evolution, suggests that intelligence is not a singular achievement of the vertebrate lineage but a solution that natural selection has discovered more than once.

Yet the octopus’s intelligence comes with a paradox. Despite their sophisticated problem-solving abilities, octopuses live only one to two years. They cannot transmit learned behavior to offspring; each generation must discover the world anew. This short lifespan raises a question that biologists are still struggling to answer: why would natural selection favor such an expensive nervous system in an animal that barely survives long enough to use it?

The passage suggests that the observation of apparent play behavior in octopuses is significant primarily because it:

Read the following passage and answer the questions that follow.

The octopus has long captivated scientists with its remarkable intelligence, but only in recent years have researchers begun to appreciate the full extent of its cognitive abilities. Unlike vertebrates, whose neurons are concentrated in the brain, the octopus distributes roughly two-thirds of its 500 million neurons across its eight arms. Each arm can taste, touch, and make decisions semi-independently — an arrangement so foreign to the vertebrate body plan that some biologists describe the octopus as "eight animals in one."

Laboratory experiments have demonstrated that octopuses can solve mazes, unscrew jars from the inside, and distinguish individual human faces — skills that require learning and memory. More provocatively, aquarium keepers report anecdotal evidence of what appears to be play: octopuses have been observed squirting jets of water at floating bottles, seemingly for amusement rather than any survival purpose. Play behavior, once considered exclusive to mammals and some birds, challenges fundamental assumptions about the relationship between brain structure and consciousness.

The evolutionary implications are profound. The last common ancestor of octopuses and humans lived approximately 600 million years ago — a simple, worm-like creature with a minimal nervous system. Complex cognition, it appears, evolved independently along radically different biological pathways. This phenomenon, known as convergent evolution, suggests that intelligence is not a singular achievement of the vertebrate lineage but a solution that natural selection has discovered more than once.

Yet the octopus’s intelligence comes with a paradox. Despite their sophisticated problem-solving abilities, octopuses live only one to two years. They cannot transmit learned behavior to offspring; each generation must discover the world anew. This short lifespan raises a question that biologists are still struggling to answer: why would natural selection favor such an expensive nervous system in an animal that barely survives long enough to use it?

As it is used in the third paragraph, the word "convergent" most nearly means:

Read the following passage and answer the questions that follow.

The octopus has long captivated scientists with its remarkable intelligence, but only in recent years have researchers begun to appreciate the full extent of its cognitive abilities. Unlike vertebrates, whose neurons are concentrated in the brain, the octopus distributes roughly two-thirds of its 500 million neurons across its eight arms. Each arm can taste, touch, and make decisions semi-independently — an arrangement so foreign to the vertebrate body plan that some biologists describe the octopus as "eight animals in one."

Laboratory experiments have demonstrated that octopuses can solve mazes, unscrew jars from the inside, and distinguish individual human faces — skills that require learning and memory. More provocatively, aquarium keepers report anecdotal evidence of what appears to be play: octopuses have been observed squirting jets of water at floating bottles, seemingly for amusement rather than any survival purpose. Play behavior, once considered exclusive to mammals and some birds, challenges fundamental assumptions about the relationship between brain structure and consciousness.

The evolutionary implications are profound. The last common ancestor of octopuses and humans lived approximately 600 million years ago — a simple, worm-like creature with a minimal nervous system. Complex cognition, it appears, evolved independently along radically different biological pathways. This phenomenon, known as convergent evolution, suggests that intelligence is not a singular achievement of the vertebrate lineage but a solution that natural selection has discovered more than once.

Yet the octopus’s intelligence comes with a paradox. Despite their sophisticated problem-solving abilities, octopuses live only one to two years. They cannot transmit learned behavior to offspring; each generation must discover the world anew. This short lifespan raises a question that biologists are still struggling to answer: why would natural selection favor such an expensive nervous system in an animal that barely survives long enough to use it?

According to the passage, approximately what fraction of an octopus’s neurons are located in its arms rather than its brain?

Read the following passage and answer the questions that follow.

The octopus has long captivated scientists with its remarkable intelligence, but only in recent years have researchers begun to appreciate the full extent of its cognitive abilities. Unlike vertebrates, whose neurons are concentrated in the brain, the octopus distributes roughly two-thirds of its 500 million neurons across its eight arms. Each arm can taste, touch, and make decisions semi-independently — an arrangement so foreign to the vertebrate body plan that some biologists describe the octopus as "eight animals in one."

Laboratory experiments have demonstrated that octopuses can solve mazes, unscrew jars from the inside, and distinguish individual human faces — skills that require learning and memory. More provocatively, aquarium keepers report anecdotal evidence of what appears to be play: octopuses have been observed squirting jets of water at floating bottles, seemingly for amusement rather than any survival purpose. Play behavior, once considered exclusive to mammals and some birds, challenges fundamental assumptions about the relationship between brain structure and consciousness.

The evolutionary implications are profound. The last common ancestor of octopuses and humans lived approximately 600 million years ago — a simple, worm-like creature with a minimal nervous system. Complex cognition, it appears, evolved independently along radically different biological pathways. This phenomenon, known as convergent evolution, suggests that intelligence is not a singular achievement of the vertebrate lineage but a solution that natural selection has discovered more than once.

Yet the octopus’s intelligence comes with a paradox. Despite their sophisticated problem-solving abilities, octopuses live only one to two years. They cannot transmit learned behavior to offspring; each generation must discover the world anew. This short lifespan raises a question that biologists are still struggling to answer: why would natural selection favor such an expensive nervous system in an animal that barely survives long enough to use it?

The author most likely includes the final paragraph in order to: