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Can you explain the difference between positive and negative feedback loops in ESS?
Great question! Understanding feedback loops is crucial for ESS. Here's the key difference:
🔄 Negative Feedback Loop
Acts to reduce or counteract change, maintaining stability. Example: Body temperature regulation - when you get too hot, you sweat to cool down.
⚡ Positive Feedback Loop
Acts to amplify change, moving the system further from equilibrium. Example: Melting ice reduces albedo, causing more warming and more melting.
Would you like me to explain how examiners want you to discuss these in Paper 1 or 2?
Yes please! How would I answer a 6-mark "Evaluate" question about this?
For a 6-mark "Evaluate" question, examiners expect:
- ✅ Clear definitions with examples
- ✅ Advantages AND disadvantages/limitations
- ✅ A balanced conclusion with your judgment
- ✅ Use of IB-specific terminology
Want me to generate a practice question for you to try?
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