Tipping Points
Critical thresholds in systems beyond which rapid, often irreversible change occurs.
Real World
The West Antarctic Ice Sheet is considered a climate tipping point; scientists estimate that just 1.5–2°C of global warming could trigger irreversible collapse, raising sea levels by over 3 metres over centuries.
Exam Focus
Emphasise irreversibility and the shift to a new equilibrium state — answers describing tipping points as simply 'big changes' miss key marks.
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