Question
Describe FOUR pieces of evidence that suggest the Earth's climate is changing.
[8 marks — 2 per piece of evidence]
Mark scheme — B2 per piece (B1 name + B1 developed description):
- Temperature records: global average temperatures ~1.1°C above pre-industrial baseline; ten hottest years all since 2010 (B2).
- Ice core data: ancient air bubbles show correlation between CO₂ and temperature; current CO₂ levels (420+ ppm) unprecedented in 800,000 years (B2).
- Sea level rise: ~20 cm rise since 1900; accelerating at 3.7 mm/year due to thermal expansion and ice melt (B2).
- Retreating glaciers: almost all glaciers worldwide retreating; Arctic summer sea ice ~40% less than in 1979 (B2).
- Increasing extreme weather: more frequent and intense heatwaves, droughts, floods, wildfires (B2). Award any four.
Total: 8 marks.
8 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.