PaginePaginepagineapp.comRead both texts. Compare how each develops its ideas.
In the window of the antique shop sat a clockwork bird in a gilded cage. When wound, it sang a song no living bird had ever sung — a strange, mechanical warble that somehow made people stop on the sidewalk.
The shopkeeper refused every offer to buy it. "It’s not for sale," he said, again and again, until the town decided he was simply stubborn.
After he died, his granddaughter found his notebook. Fifty years earlier, his wife had been a singer who lost her voice to illness. He had spent three years building the bird from a recording of her last performance, adjusting every gear until it matched the tune she sang to him on their wedding night.
The granddaughter wound the bird once. Then she placed it back in the window, with a new sign: "Not for sale. Listen as long as you like."
When astronomers measured how fast stars orbit the centers of galaxies, they found something puzzling: stars far from the center move almost as fast as those close in. Based on the visible matter alone, they should move much more slowly.
The leading explanation is that galaxies contain large amounts of unseen "dark matter" whose gravity holds them together. Evidence for it also comes from the way galaxy clusters bend light from more distant objects, an effect called gravitational lensing.
According to current estimates, dark matter makes up about 85 percent of the matter in the universe. Yet it does not emit, absorb or reflect light, and no experiment has directly detected it.
Some physicists propose alternative theories that modify our understanding of gravity instead. Determining which explanation is correct remains one of the great open questions in science.
| The Clockwork Bird | Dark Matter | |
|---|---|---|
| Genre and purpose | ||
| Central idea or theme | ||
| How the author develops it | ||
| Key evidence or detail |
Worksheets › Grade 12 English › Integration of Knowledge & Ideas › Integration of Knowledge & Ideas
Free Grade 12 English worksheet (Common Core RL.11-12.9): compare "The Clockwork Bird" with "Dark Matter" and analyze how each develops its ideas. Skill: Compare texts and evaluate arguments. Level: Grade 12 — also suits Year 13 (UK).
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It is designed for Grade 12 (ages 17–18), but use it with any child who is ready.
Compare texts and evaluate arguments.
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Integration of Knowledge & Ideas: Compare Texts: Sonnet 18 & Artificial Intelligence and the Future of Work (Grade 12) · Integration of Knowledge & Ideas: Evaluate an Argument: The Great Migration (Grade 12) · Integration of Knowledge & Ideas: Compare Texts: The Translator’s Dilemma & Should Social Media Companies Be Regulated Like Publishers? (Grade 12) · Integration of Knowledge & Ideas: Evaluate an Argument: Artificial Intelligence and the Future of Work (Grade 12)
All 5 integration of knowledge & ideas sheets → · Grade 12 English: all 10 skills → · All Common Core grades
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