Central Ideas and Details Flashcards

Read this passage: 'Bees are among the world's most important pollinators, responsible for pollinating roughly one-third of the food humans consume. Colony collapse disorder, pesticide exposure, habitat loss, and disease have caused significant declines in bee populations worldwide. Conservation efforts now focus on planting bee-friendly gardens, restricting harmful pesticides, and protecting natural habitats.' What is the central idea?

Answer: Bees are critical pollinators whose declining populations require active conservation efforts

The passage establishes bees' importance, identifies threats to their survival, and describes conservation responses — all integrated in choice B.

Read: 'The gig economy, characterized by short-term contracts and freelance work, has grown rapidly with digital platforms like Uber, TaskRabbit, and Fiverr. Proponents argue it offers workers flexibility and autonomy. Critics counter that gig workers often lack benefits, job security, and legal protections afforded to traditional employees.' What is the main idea?

Answer: The gig economy offers both opportunities and significant drawbacks for workers

The passage presents both the advantages (flexibility, autonomy) and disadvantages (lack of benefits, security) of the gig economy, which choice B captures.

A passage reads: 'Marie Curie was the first woman to win a Nobel Prize, and the only person to win Nobel Prizes in two different sciences — Physics in 1903 and Chemistry in 1911. Her research on radioactivity not only advanced science but also opened medicine to new treatments. Despite her achievements, she faced significant gender discrimination throughout her career.' What detail best supports the claim that Curie made an extraordinary scientific contribution?

Answer: Curie won Nobel Prizes in two different scientific fields

Winning Nobels in two different scientific disciplines is uniquely remarkable and directly demonstrates an extraordinary contribution to science.

Read: 'The Columbian Exchange refers to the widespread transfer of plants, animals, culture, and ideas between the Americas and the Old World following Columbus's 1492 voyage. Foods like potatoes, tomatoes, and corn transformed European diets and helped fuel population growth. Conversely, Old World diseases devastated Indigenous populations in the Americas.' What is the central idea?

Answer: The Columbian Exchange was a massive and consequential transfer of goods and diseases between hemispheres

The passage defines the Columbian Exchange as a broad transfer with significant consequences in both directions — captured in choice C.

Read this passage: 'Social media platforms have fundamentally changed political communication. Politicians now bypass traditional media to speak directly to constituents via Twitter and Instagram. While this democratizes information access, it also enables the rapid spread of misinformation and creates echo chambers where users only encounter views they already hold.' What does the author most want readers to understand?

Answer: Social media has transformed political communication in both empowering and problematic ways

The author presents both the democratizing benefit and the misinformation/echo chamber problems — a balanced view captured in choice B.

A student reads: 'In the 1950s and 60s, NASA's space program captured the American imagination and drove significant technological innovation. Thousands of engineers and scientists worked to overcome unprecedented challenges. The technologies developed — from memory foam to water filters — eventually found widespread civilian applications.' Which statement best identifies a key supporting detail for the idea that the space program benefited everyday life?

Answer: Technologies developed for space exploration became widely used in civilian life

The specific claim that space technologies like memory foam and water filters reached civilian use directly supports the benefit-to-everyday-life idea.

Read: 'Mindfulness meditation, rooted in Buddhist tradition, has entered mainstream healthcare. Studies show it reduces stress, anxiety, and symptoms of depression. Hospitals and corporations alike now offer mindfulness programs, and schools are introducing it to students as young as five years old.' What is the central idea?

Answer: Mindfulness meditation has become widely adopted across society due to evidence of its health benefits

The passage tracks mindfulness from its roots to mainstream adoption in healthcare, business, and education — driven by evidence of benefits.

A passage reads: 'Water covers over 70 percent of Earth's surface, yet only about 3 percent is freshwater, and most of that is locked in glaciers and ice caps. Less than 1 percent of all water on Earth is accessible for human use. As populations grow and climate change alters precipitation patterns, water scarcity is becoming a critical global challenge.' What supporting detail most directly reinforces the claim that usable water is extremely scarce?

Answer: Less than 1 percent of all Earth's water is accessible for human use

The statistic that less than 1% of all water is accessible for human use is the most direct and striking evidence of water scarcity.