ISAT - International Student Admissions Reading Comprehension: Main Idea 2 — Questions and Answers
Question 1: A passage discusses how ancient Roman aqueducts used gravity to transport water over long distances, incorporating gentle slopes and arched bridges to maintain flow up to 100 kilometers. What is the main idea?
- Roman bridges were impressive
- Roman aqueducts demonstrated remarkable engineering by using gravity and precise gradients to deliver water across vast distances (Correct answer)
- Romans had unlimited water
- Gravity is useful for transporting liquids
Correct answer: Roman aqueducts demonstrated remarkable engineering by using gravity and precise gradients to deliver water across vast distances
The main idea centers on the engineering achievement of aqueducts using natural forces and precise construction.
All details (gravity, slopes, bridges, distance) support the central idea: Roman water engineering was remarkably sophisticated.
Question 2: A passage explains that deep-sea hydrothermal vents support ecosystems using chemosynthesis rather than sunlight, including unique species found nowhere else. Scientists study these as models for extraterrestrial life. Main idea?
- Giant tube worms are important
- Vent ecosystems demonstrate that complex life can thrive without sunlight, expanding our understanding of where life can exist (Correct answer)
- Deep-sea exploration is most important
- All life depends on the sun
Correct answer: Vent ecosystems demonstrate that complex life can thrive without sunlight, expanding our understanding of where life can exist
The central theme is that these ecosystems challenge the assumption that life requires sunlight.
The passage shows life can thrive through alternative energy sources (chemosynthesis), with implications for extraterrestrial life.
Question 3: A passage describes how the printing press enabled mass book production, reduced costs, increased literacy, and democratized access to information previously controlled by elites. Main idea?
- Invented in the 15th century
- Books became cheaper
- The printing press fundamentally transformed European society by democratizing knowledge and challenging existing power structures (Correct answer)
- Religious institutions lost all power
Correct answer: The printing press fundamentally transformed European society by democratizing knowledge and challenging existing power structures
The passage traces how the printing press changed knowledge and power dynamics in European society.
The main idea captures the transformative societal impact on knowledge access and power dynamics.
Question 4: A passage discusses honeybee waggle dance communication: direction relative to sun, duration indicates distance, precise to within a few degrees. Main idea?
- Bees like to dance
- Honeybees have evolved a sophisticated symbolic communication system conveying precise spatial information through dance (Correct answer)
- Bees use the sun for navigation
- Insect behavior is simple
Correct answer: Honeybees have evolved a sophisticated symbolic communication system conveying precise spatial information through dance
The main idea is about the sophistication of bee communication encoding complex spatial information.
The passage presents the waggle dance as a remarkable symbolic language system with directional, distance, and precision encoding.
Question 5: A passage examines antibiotic resistance: overuse in medicine and agriculture accelerates resistant bacteria evolution. Without effective antibiotics, common infections could become deadly. Researchers explore alternatives. Main idea?
- Doctors prescribe too many antibiotics
- Agriculture should stop antibiotics
- Antibiotic resistance poses a serious threat requiring urgent development of alternatives to prevent regression to the pre-antibiotic era (Correct answer)
- Phage therapy will replace antibiotics
Correct answer: Antibiotic resistance poses a serious threat requiring urgent development of alternatives to prevent regression to the pre-antibiotic era
The main idea encompasses the threat, its cause, consequences, and response.
The correct answer integrates all elements: threat, cause, consequence, and response.
Question 6: A passage describes neuroplasticity overturning the belief that adult brains are fixed. Research shows continuous neural connection formation, improving stroke rehabilitation and mental health treatments. Main idea?
- The brain stops developing in adulthood
- Stroke patients can fully recover
- Neuroplasticity has revolutionized our understanding of the brain by revealing its lifelong capacity to change, with significant implications for medicine (Correct answer)
- Neural connections form only in childhood
Correct answer: Neuroplasticity has revolutionized our understanding of the brain by revealing its lifelong capacity to change, with significant implications for medicine
The main idea is that neuroplasticity represents a paradigm shift with practical medical implications.
The passage presents a scientific paradigm shift (static brain to plastic brain) and its real-world impact on medicine.
ISAT - International Student Admissions Reading Comprehension: Main Idea 2
A passage discusses how ancient Roman aqueducts used gravity to transport water over long distances, incorporating gentle slopes and arched bridges to maintain flow up to 100 kilometers.
What is the main idea?