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A feedback loop occurs when a change triggers effects that either amplify it (a positive feedback) or dampen it (a negative feedback). Several feedback loops help explain why Earth’s climate can change faster than expected.
Consider Arctic sea ice. Bright ice reflects much of the sunlight that hits it. As warming melts the ice, darker ocean water is exposed, which absorbs more heat, causing more melting. This is called the ice–albedo feedback.
Permafrost — ground that has stayed frozen for thousands of years — stores large amounts of carbon. As it thaws, microbes break down that organic matter and release carbon dioxide and methane, which trap more heat.
Not all feedbacks amplify warming. Plants may grow faster with more carbon dioxide and absorb some of it. Scientists study these competing effects to make climate projections more accurate.
| Claim or central idea | |
|---|---|
| Reason / evidence 1 | |
| Reason / evidence 2 | |
| Counterclaim (if any) | |
| Is the evidence relevant and sufficient? Why? |
Worksheets › Grade 11 English › Integration of Knowledge & Ideas › Integration of Knowledge & Ideas
Free Grade 11 English worksheet (Common Core RI.11-12.8): trace and evaluate the argument and claims in "Climate Feedback Loops", judging whether the evidence is relevant and sufficient. Skill: Compare texts and evaluate arguments. Level: Grade 11 — also suits Year 12 (UK).
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It is designed for Grade 11 (ages 16–17), but use it with any child who is ready.
Compare texts and evaluate arguments.
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Integration of Knowledge & Ideas: Compare Texts: The Inheritance of Silence & The Declaration of Independence (Grade 11) · Integration of Knowledge & Ideas: Compare Texts: The Portrait & Should College Be Free? (Grade 11) · Integration of Knowledge & Ideas: Evaluate an Argument: The Declaration of Independence (Grade 11) · Integration of Knowledge & Ideas: Compare Texts: Small Talk & The Rise of the Novel (Grade 11)
All 5 integration of knowledge & ideas sheets → · Grade 11 English: all 10 skills → · All Common Core grades
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