Free SAT Reading Science and History Passages Practice Test — Questions and Answers

Question 1: A passage states: 'While early researchers believed bacteria caused stomach ulcers due to stress, Marshall and Warren's 1984 study demonstrated that Helicobacter pylori is the primary cause.' The passage suggests that scientific understanding of ulcers:

Has always been focused on bacterial causes
Changed significantly following new experimental evidence (Correct answer)
Remains contested with no accepted explanation
Showed stress was completely irrelevant

Correct answer: Changed significantly following new experimental evidence

The passage directly describes a shift from one explanation (stress) to another (bacterial infection) based on new evidence — a hallmark of scientific progress.

Question 2: In a history passage about the Industrial Revolution, the author writes: 'Factory owners grew wealthy as workers labored in dangerous conditions for 14 hours a day.' The author's tone is best described as:

Celebratory
Neutral and objective
Critical of the inequity (Correct answer)
Nostalgic

Correct answer: Critical of the inequity

The contrast between growing wealth and dangerous long labor implies a critical stance toward the exploitative conditions of the era.

Question 3: A science passage describes a control group and an experimental group in a study. What is the PURPOSE of the control group?

To show the maximum possible outcome
To provide a baseline for comparison (Correct answer)
To introduce the variable being tested
To eliminate all variables from the study

Correct answer: To provide a baseline for comparison

A control group receives no treatment (or a standard treatment) to serve as a comparison baseline, allowing researchers to isolate the effect of the independent variable.

Question 4: A history passage describes how the printing press 'democratized knowledge by making books affordable to common people.' The word 'democratized' most nearly means:

Made political
Made widely available or accessible (Correct answer)
Standardized across nations
Made expensive

Correct answer: Made widely available or accessible

To 'democratize' something means to make it available to a wide audience, not just an elite — here, making books accessible to ordinary people.

Question 5: A science passage describes an experiment where adding fertilizer to plants increased growth, but only up to a certain point — beyond which growth declined. Which conclusion best fits this data?

More fertilizer always helps plant growth
Fertilizer has no effect on plants
There is an optimal amount of fertilizer beyond which it becomes harmful (Correct answer)
Plants do not need nutrients to grow

Correct answer: There is an optimal amount of fertilizer beyond which it becomes harmful

The data shows a dose-response relationship with a threshold — growth increases then decreases, indicating an optimal dose beyond which more becomes harmful.

Question 6: A history passage about the Civil Rights Movement states that 'legislative victories alone did not end discrimination.' What is the passage most likely arguing?

Laws were completely ineffective
Social and cultural change must accompany legal reform for full equality (Correct answer)
Discrimination increased after civil rights legislation
Only economic change matters

Correct answer: Social and cultural change must accompany legal reform for full equality

The passage acknowledges laws were important but insufficient alone — implying that deep cultural and social change is also necessary.

Question 7: In a science passage, a researcher writes that her findings 'support but do not conclusively prove' her hypothesis. This phrasing indicates:

The experiment failed completely
Science requires absolute proof before any claim can be made
Scientific evidence can support hypotheses without definitively proving them (Correct answer)
The researcher is dishonest

Correct answer: Scientific evidence can support hypotheses without definitively proving them

Scientific language recognizes that evidence supports or undermines hypotheses; definitive 'proof' in the mathematical sense is rare in empirical science.

Question 8: A history passage discusses how Rome's expansion strained its supply chains and governance. This passage is most concerned with which theme?

The artistic achievements of Rome
The religious practices of Roman citizens
The relationship between imperial growth and institutional failure (Correct answer)
Trade partnerships between Rome and Asia

Correct answer: The relationship between imperial growth and institutional failure

The focus on strained logistics and governance resulting from expansion points to a central theme: how growth itself can undermine the systems that enabled it.

Question 9: A graph in a science passage shows CO₂ levels rising steeply after 1950. The passage states this correlates with industrialization. A reader should conclude:

Industrialization definitely causes CO₂ increases
CO₂ and industrialization are correlated, but the passage does not claim direct causation (Correct answer)
CO₂ levels have always been rising
Industrialization reduced CO₂ after 1950

Correct answer: CO₂ and industrialization are correlated, but the passage does not claim direct causation

Correlation (both rising together) is shown; the passage avoids claiming causation without further evidence — a key distinction in scientific reading.

Question 10: A passage about the Dust Bowl describes farmers who 'could not have known that their traditional practices would strip the soil bare.' This statement primarily suggests:

Farmers were negligent and irresponsible
Environmental disasters can stem from lack of knowledge rather than malice (Correct answer)
The government should have prevented the Dust Bowl
Farming practices in that era were highly sustainable

Correct answer: Environmental disasters can stem from lack of knowledge rather than malice

The phrase 'could not have known' removes blame from farmers, suggesting the disaster arose from ignorance rather than intent — a nuanced historical perspective.

Question 11: A science passage uses the phrase 'peer-reviewed study.' This most likely means:

The study was funded by a corporation
Other experts evaluated and verified the research before publication (Correct answer)
The study was conducted by students
Only one scientist reviewed the data

Correct answer: Other experts evaluated and verified the research before publication

Peer review is the process by which independent experts in a field evaluate a study's methodology and conclusions before it is published — a standard of scientific credibility.

Question 12: A history passage about the French Revolution states that 'economic inequality fueled popular anger.' The word 'fueled' implies:

Inequality was the result of the revolution
Economic inequality was an unrelated side issue
Economic inequality intensified or fed the growing discontent (Correct answer)
The economy improved after the revolution

Correct answer: Economic inequality intensified or fed the growing discontent

'Fueled' is a metaphor for feeding or intensifying something — here, inequality intensified popular anger, functioning as a cause of revolution.

Question 13: A science passage discusses two competing theories to explain the same phenomenon. The author presents both without concluding which is correct. This suggests:

Neither theory has any merit
The author is poorly informed
The scientific community has not yet reached consensus on this question (Correct answer)
Both theories are factually wrong

Correct answer: The scientific community has not yet reached consensus on this question

Presenting both sides without resolution reflects an area of active scientific debate where evidence is insufficient to establish consensus.

Question 14: A history passage describes how 'railroad construction opened the American West but also displaced Indigenous communities.' The author's approach to this topic is best described as:

One-sided celebration of progress
Acknowledging both positive outcomes and human costs (Correct answer)
Purely condemning railroad expansion
Avoiding the topic of Indigenous displacement

Correct answer: Acknowledging both positive outcomes and human costs

The passage uses 'but also' to balance the economic benefit with the human cost — a nuanced, multi-perspective approach.

Question 15: In a science passage, the author writes that 'correlation does not equal causation.' This phrase warns against:

Collecting too much data
Assuming that because two things happen together, one caused the other (Correct answer)
Using experiments to test hypotheses
Interpreting graphs incorrectly

Correct answer: Assuming that because two things happen together, one caused the other

This classic scientific caution reminds us that two variables can co-vary without one causing the other — a third variable may be responsible, or the relationship could be coincidental.

Question 16: A history passage discusses the role of women in World War II. The author emphasizes their contributions in factories and military support. The passage's central argument is most likely:

Women should not have worked during the war
Women's wartime contributions challenged gender norms and expanded their social roles (Correct answer)
The war was won primarily by military strategy, not industrial output
Gender roles were unchanged after the war

Correct answer: Women's wartime contributions challenged gender norms and expanded their social roles

Emphasizing women's contributions implies an argument about how the war disrupted traditional gender roles and created pathways for women's expanded social participation.

Question 17: A science passage describes an invasive species that thrives because it has 'no natural predators' in its new environment. This best explains the species':

Rapid population growth and ecological disruption (Correct answer)
Gradual decline from disease
Successful integration with native species
Inability to reproduce in a new climate

Correct answer: Rapid population growth and ecological disruption

Without natural predators to control population growth, an invasive species can multiply rapidly, disrupting the ecosystem's balance.

Question 18: A history passage about colonialism notes that 'the colonizers imposed their language, suppressing indigenous tongues.' The word 'suppressing' conveys:

A neutral description of language policy
Active force used to diminish or eliminate indigenous languages (Correct answer)
That indigenous languages were voluntarily abandoned
Language diversity was celebrated

Correct answer: Active force used to diminish or eliminate indigenous languages

'Suppressing' implies active force or coercion to restrict or eliminate something — carrying a clearly negative connotation about colonial language policies.

Question 19: In a science passage, an author criticizes a study for having a 'small sample size.' The author's concern is most likely that:

The study cost too much
The results may not be generalizable to the broader population (Correct answer)
The researchers were unqualified
The study lasted too long

Correct answer: The results may not be generalizable to the broader population

A small sample size limits statistical power and generalizability — findings from a small group may not reliably predict what would happen in a larger, more diverse population.

Question 20: A history passage discusses a document that 'served as a template for future democratic constitutions.' The word 'template' most nearly means:

A rough draft with many errors
A model that others copied or built upon (Correct answer)
An outdated and rejected plan
A secret treaty

Correct answer: A model that others copied or built upon

A template is a pattern or model from which copies or adaptations are made — here, the document influenced later constitutions.

Question 21: A passage describes an experiment where the researchers did not know which patients received the actual treatment versus a placebo. This is called:

An open-label trial
A single-blind study
A double-blind study (Correct answer)
A retrospective study

Correct answer: A double-blind study

A double-blind study means neither the participants nor the researchers know who received the treatment, eliminating bias from both sides.

Question 22: A history passage about the Cold War states that 'both superpowers framed their actions in terms of freedom and democracy.' The passage implies this framing was:

Always completely honest
Rhetorical — used to justify geopolitical interests (Correct answer)
Ignored by global audiences
Based purely on humanitarian concern

Correct answer: Rhetorical — used to justify geopolitical interests

By noting that both sides used the same language, the passage implies the rhetoric served ideological and political purposes rather than purely reflecting reality.

Question 23: A science passage notes that a drug 'showed statistically significant improvement in the treatment group compared to placebo.' The word 'significant' here means:

The improvement was very large
The difference was unlikely to be due to chance (Correct answer)
All patients recovered fully
The drug was FDA-approved

Correct answer: The difference was unlikely to be due to chance

In statistical terms, 'significant' means the result is unlikely to have occurred by random chance — it does not necessarily mean the effect size was large.

Question 24: A history passage argues that 'geography played a decisive role in shaping civilizations.' To support this claim, the author would most likely cite:

Biographies of famous leaders
Maps showing how rivers and mountains influenced settlements and trade routes (Correct answer)
A timeline of military battles
Literary works from the period

Correct answer: Maps showing how rivers and mountains influenced settlements and trade routes

To support a geographic determinism argument, physical evidence showing how terrain features shaped where and how civilizations developed would be most relevant.

Question 25: In a science passage, the author describes a hypothesis as 'falsifiable.' This means:

The hypothesis is known to be false
It can be tested and potentially proven wrong by evidence (Correct answer)
The hypothesis is very difficult to understand
Only experts can evaluate it

Correct answer: It can be tested and potentially proven wrong by evidence

Falsifiability — the ability to be proven wrong by evidence — is a cornerstone of the scientific method. Non-falsifiable claims cannot be tested scientifically.

Question 26: A history passage discusses a primary source document. The author notes it was written by a general who lost the battle being described. This is important because:

It makes the source more objective
The general's perspective may be biased by self-justification or regret (Correct answer)
Military documents are always reliable
Primary sources are always more accurate than secondary sources

Correct answer: The general's perspective may be biased by self-justification or regret

A participant's account is shaped by their personal experience, emotions, and motivations. A losing general may minimize mistakes or shift blame — a key bias to consider.

Question 27: A science passage comparing two medications concludes that 'both were equally effective, but Drug A caused fewer side effects.' The passage most likely recommends:

Neither drug
Drug B because it was tested on more patients
Drug A because equal efficacy with fewer side effects is preferable (Correct answer)
More testing before any recommendation

Correct answer: Drug A because equal efficacy with fewer side effects is preferable

When two treatments are equally effective, the one with fewer adverse effects is the superior clinical choice — a basic principle of medical decision-making.

Question 28: A history passage describes the impact of a drought as 'the final blow to an already weakened empire.' The phrase 'final blow' implies:

The drought was the sole cause of the empire's collapse
The empire was thriving before the drought
The drought was the last in a series of stressors that caused the collapse (Correct answer)
The drought had no impact on the empire

Correct answer: The drought was the last in a series of stressors that caused the collapse

'Final blow' implies the empire was already weakened by other causes; the drought was the last event that pushed it to collapse — not the only cause.

Question 29: A science passage defines 'photosynthesis' as 'the process by which plants convert light energy into chemical energy.' The primary purpose of this sentence in the passage is to:

Argue that photosynthesis is inefficient
Provide background knowledge necessary for understanding the passage's main argument (Correct answer)
Describe the history of scientific discovery
Challenge a competing theory

Correct answer: Provide background knowledge necessary for understanding the passage's main argument

Definitions provide foundational knowledge, establishing shared understanding of a concept before the author builds more complex arguments.

Question 30: A history passage states: 'Historians disagree about whether economic factors or political ambition primarily drove World War I.' This statement suggests:

There is one clear cause that all historians accept
Causation in history is often complex and contested (Correct answer)
World War I had no identifiable causes
Economic factors are always the root of all wars

Correct answer: Causation in history is often complex and contested

The statement highlights ongoing scholarly debate, reflecting that historical causation is multifaceted and that evidence can support competing interpretations.

Question 31: A science passage describes how scientists use tree rings to estimate historical climate conditions. This technique is an example of:

Direct experimental measurement
Proxy data — using indirect evidence to reconstruct past conditions (Correct answer)
Computer modeling only
Eyewitness historical accounts

Correct answer: Proxy data — using indirect evidence to reconstruct past conditions

Tree rings (dendrochronology) are proxy data — physical records that indirectly preserve information about past conditions like temperature and rainfall.

Question 32: A history passage describes a document signed under 'duress.' The word 'duress' most nearly means:

Great enthusiasm
Coercion or extreme pressure (Correct answer)
Careful deliberation
Public celebration

Correct answer: Coercion or extreme pressure

'Duress' means coercion or threats — a document signed under duress was signed unwillingly due to force or pressure, which may affect its legal or moral validity.

Question 33: A science passage notes that a study's results 'could not be replicated by independent researchers.' This most directly suggests:

The original study was definitely fraudulent
The findings may not be reliable or generalizable (Correct answer)
All science is unreliable
The independent researchers made errors

Correct answer: The findings may not be reliable or generalizable

Replication is essential to scientific validity. If results cannot be reproduced, they may reflect experimental error, unusual conditions, or bias — warranting skepticism.

Question 34: A history passage about the Renaissance describes it as a 'rebirth of classical learning.' The author likely means that:

Ancient texts and ideas were rediscovered and applied to contemporary thought (Correct answer)
People physically lived as ancient Greeks and Romans
The Church created entirely new educational systems
Classical art was considered inferior to medieval art

Correct answer: Ancient texts and ideas were rediscovered and applied to contemporary thought

'Rebirth of classical learning' refers to the renewed interest in ancient Greek and Roman philosophy, art, and science — not a literal rebirth, but an intellectual revival.

Question 35: A science passage states that a drug's effect was 'modest but measurable.' This phrase most likely means:

The drug had a very large and dramatic effect
The drug had no effect
The drug had a small but statistically detectable effect (Correct answer)
Researchers disagreed on whether the drug worked

Correct answer: The drug had a small but statistically detectable effect

'Modest' means small; 'measurable' means it could be quantified and detected. Together, the phrase describes a small but real and verifiable effect.

Free SAT Reading Science and History Passages Practice Test

A passage states: 'While early researchers believed bacteria caused stomach ulcers due to stress, Marshall and Warren's 1984 study demonstrated that Helicobacter pylori is the primary cause.' The passage suggests that scientific understanding of ulcers: