Bluebook SAT Test Central Ideas and Details 2

Question 1

Read this passage: 'Microplastics — fragments smaller than 5 millimeters — have been detected in the deepest ocean trenches, the highest mountain peaks, and even in human blood.
They originate from the breakdown of larger plastic products and from microbeads in personal care items.
Scientists are urgently investigating their long-term health effects.' What is the central idea?

Accepted Answer

Microplastics are a pervasive and potentially dangerous environmental contaminant under active scientific investigation

Answer

Microplastics come from personal care products and broken-down plastic

Answer

Microplastics have been found at extreme locations including ocean trenches

Answer

Scientists are studying whether microplastics harm human health

Question 2

A passage states: 'The Renaissance, beginning in 14th-century Italy, marked a renewed interest in classical Greek and Roman culture, philosophy, and art. Scholars called humanists shifted focus from purely religious concerns to human potential and achievement. This intellectual revolution spread across Europe, transforming art, literature, science, and politics.' Which best states the central claim?

Accepted Answer

The Renaissance was a broad intellectual transformation that redirected European culture toward human-centered values

Answer

The Renaissance began in Italy during the 14th century

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Humanism replaced religion as the dominant philosophy of Europe

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Greek and Roman culture was superior to medieval European culture

Question 3

Read: 'The human gut contains trillions of microorganisms — bacteria, viruses, and fungi — collectively called the microbiome. Research links gut microbiome health to immunity, mental health, and metabolic function. Diet, particularly fiber intake, profoundly shapes microbiome composition.' What detail best supports the idea that the microbiome is important to overall health?

Accepted Answer

The microbiome influences immunity, mental health, and metabolism

Answer

The gut contains bacteria, viruses, and fungi

Answer

Fiber intake shapes microbiome composition

Answer

Trillions of microorganisms live in the human gut

Question 4

Read this passage: 'Thomas Edison did not invent the lightbulb outright; he improved an existing technology. Earlier inventors had created bulbs that burned out quickly or required impractical power sources. Edison's contribution was developing a long-lasting, practical filament and a complete electrical distribution system that made electric lighting commercially viable.' What is the main idea?

Accepted Answer

Edison's true achievement was making electric lighting practical and commercially available

Answer

Edison's most important invention was the electrical distribution system

Answer

Earlier inventors failed because they could not find a good filament material

Answer

The lightbulb was a collaborative invention developed over many decades

Question 5

A passage reads: 'Languages die when their last native speakers die. Currently, linguists estimate that one language becomes extinct every two weeks. Of the roughly 7,000 languages spoken today, at least half are expected to vanish by 2100. Each extinct language represents an irreplaceable loss of cultural heritage and unique ways of understanding the world.' What is the central idea?

Accepted Answer

Languages are dying at an alarming rate, and each loss represents an irreplaceable cultural and cognitive loss

Answer

Linguists are working to document endangered languages before they disappear

Answer

About 3,500 of today's languages will be extinct by 2100

Answer

Language death occurs when the last native speaker dies

Question 6

Read: 'The Harlem Renaissance of the 1920s and 1930s was an explosion of African American artistic, literary, and intellectual life centered in New York City. Writers like Langston Hughes and Zora Neale Hurston produced landmark works, while jazz and blues musicians transformed American music. The movement gave African Americans a powerful cultural voice during an era of racial oppression.' Which statement best summarizes the passage?

Accepted Answer

The Harlem Renaissance was a vibrant cultural movement that empowered African Americans during a period of oppression

Answer

Langston Hughes and Zora Neale Hurston were the most important writers of the 1920s

Answer

Jazz and blues have their roots in the Harlem Renaissance of New York City

Answer

New York City was the center of American artistic life in the early 20th century

Question 7

Read this: 'Vaccines work by training the immune system to recognize and fight specific pathogens. They introduce a harmless version or component of a pathogen, prompting the immune system to produce antibodies. If the vaccinated person later encounters the real pathogen, their immune system responds rapidly, preventing serious illness.' What is the central claim?

Accepted Answer

Vaccines protect individuals by pre-training the immune system to respond quickly to real infections

Answer

Antibodies are the key component of the immune system's response to infection

Answer

Vaccines use harmless pathogen components to stimulate immunity

Answer

The immune system is a complex system that defends the body against disease

Question 8

A passage states: 'The Great Wall of China was not built all at once; it was constructed in sections over many centuries by different Chinese states and dynasties. The earliest walls date to the 7th century BCE, while the most famous sections were built during the Ming Dynasty (1368–1644). The wall served primarily as a military defense system but also facilitated trade and communication.' What supporting detail best backs the idea that the Great Wall had multiple purposes?

Accepted Answer

The wall served as military defense and also facilitated trade and communication

Answer

The earliest walls date to the 7th century BCE

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The Ming Dynasty built the most famous sections of the wall

Answer

The wall was constructed in sections over many centuries