Bluebook SAT Test Central Ideas and Details

Question 1

Read the following passage: 'The monarch butterfly's annual migration spans thousands of miles, from Canada to central Mexico.
Scientists have long marveled at how these insects navigate with such precision despite having brains the size of a pinhead.
Recent research suggests they use a time-compensated sun compass, integrating light cues with their internal circadian clock.' What is the central idea of this passage?

Accepted Answer

Monarch butterflies possess a remarkable navigation system that scientists are still studying

Answer

Monarch butterflies travel from Canada to Mexico each year

Answer

Scientists have discovered that monarch butterflies use sunlight to navigate

Answer

Monarch butterflies have very small brains compared to their body size

Question 2

Read the following passage: 'Urban heat islands occur when cities replace natural land cover with dense concentrations of pavement, buildings, and other surfaces that absorb and retain heat. This effect can raise urban temperatures by 1–7°F compared to surrounding rural areas. The consequences include increased energy consumption, elevated emissions, and compromised human health and comfort.' Which statement best summarizes the author's central claim?

Accepted Answer

Urban heat islands are caused by natural land being replaced by heat-retaining surfaces, with significant negative consequences

Answer

Cities are always hotter than rural areas because of buildings

Answer

Pavement is the primary cause of rising city temperatures worldwide

Answer

Human health is the most serious consequence of the urban heat island effect

Question 3

A passage states: 'The printing press, invented by Johannes Gutenberg around 1440, democratized knowledge by making books affordable and widely available. Before this invention, manuscripts were hand-copied by monks, limiting literacy to the elite. Within decades of the press's introduction, book production soared and literacy rates began climbing across Europe.' What detail best supports the central idea that the printing press expanded access to knowledge?

Accepted Answer

Book production soared and literacy rates climbed after the press was introduced

Answer

Gutenberg invented the printing press around 1440

Answer

Monks hand-copied manuscripts before the printing press

Answer

The printing press made books affordable

Question 4

Read this passage: 'Coral reefs cover less than one percent of the ocean floor but support approximately 25 percent of all marine species. They provide food and livelihoods for hundreds of millions of people and protect coastlines from storm damage. Despite their importance, reefs are threatened by warming oceans, ocean acidification, and pollution.' What is the main idea?

Accepted Answer

Coral reefs are extraordinarily valuable ecosystems that face serious threats

Answer

Coral reefs are shrinking because of climate change and pollution

Answer

More than a quarter of marine species depend on coral reefs for survival

Answer

Millions of people rely on coral reefs for food and economic support

Question 5

A student reads: 'Sleep deprivation impairs cognitive function in ways that mirror alcohol intoxication. After 17–19 hours without sleep, performance on tests resembles that of someone with a blood alcohol level of 0.05%. After 24 hours awake, impairment equals a blood alcohol level of 0.10%, which is above the legal driving limit in most countries.' What supporting detail reinforces the central claim that sleep deprivation seriously impairs cognition?

Accepted Answer

After 24 hours awake, impairment equals illegal intoxication levels

Answer

Many countries set blood alcohol limits for drivers

Answer

Sleep deprivation is a common problem in modern society

Answer

Cognitive tests measure a variety of mental skills

Question 6

Read this passage: 'The Amazon rainforest produces about 20 percent of Earth's oxygen through photosynthesis. It also regulates regional and global climate by releasing vast amounts of water vapor. Home to an estimated 10 percent of all species on Earth, it represents an irreplaceable reservoir of biodiversity.' The primary purpose of listing these three facts is to:

Accepted Answer

Demonstrate the Amazon's critical and multifaceted importance to the planet

Answer

Argue that the Amazon should be declared a world heritage site

Answer

Warn readers about the dangers of deforestation

Answer

Explain how photosynthesis works in tropical ecosystems

Question 7

A passage reads: 'In 1962, Rachel Carson published Silent Spring, documenting the harmful effects of pesticides on wildlife, particularly birds. The book sparked public outrage and led directly to a nationwide ban on DDT in the United States. It is widely credited with launching the modern environmental movement.' What is the central idea?

Accepted Answer

Silent Spring had a transformative impact on environmental policy and public consciousness

Answer

DDT is a dangerous pesticide that was eventually banned in the United States

Answer

Rachel Carson was the most important environmental scientist of the 20th century

Answer

Birds were the primary victims of pesticide overuse in the 1960s

Question 8

Read this: 'Ancient Greek city-states, or poleis, were independent political units, each with its own government, laws, and often its own currency. While they shared language and religion, their political rivalries were fierce. Athens and Sparta, for example, fought a devastating 27-year war that weakened all of Greece.' What detail best supports the claim that Greek city-states were politically divided despite cultural unity?

Accepted Answer

Athens and Sparta fought a 27-year war that devastated Greece

Answer

Greek city-states each had their own currency

Answer

The ancient Greeks shared a common language and religion

Answer

City-states had their own governments and laws