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

The passage covers the ubiquity of microplastics, their origins, and ongoing concern about health — all aspects captured in choice C.

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 passage describes the Renaissance as a wide-ranging shift toward human-centered thought affecting many domains — captured in choice C.

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

Linking the microbiome to immunity, mental health, and metabolic function directly supports its importance to overall health.

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

The passage emphasizes that Edison's contribution was making lighting practical and commercially viable — not merely inventing the bulb.

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

The passage conveys both the alarming rate of language death and the significance of each loss — both aspects appear in choice A.

Bluebook SAT Practice Test Practice Test

Bluebook SAT Practice Test Practice Test

Bluebook SAT Test Central Ideas and Details 2