D4.3 Climate change Quiz
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5 questions, one answer each
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1. Temperature and carbon dioxide in ice cores rise and fall together. This is:
- A. A negative correlation
- B. A positive correlation
- C. Proof of causation
- D. No relationship
2. Which is a positive feedback in global warming?
- A. Increased photosynthesis absorbing carbon dioxide
- B. Loss of reflective snow and ice
- C. Planting trees
- D. Reduced use of fossil fuels
3. Warmer surface water in the ocean tends to:
- A. Increase nutrient upwelling
- B. Prevent nutrient upwelling, reducing primary production
- C. Increase calcification by corals
- D. Increase oxygen in deep water
4. Coral bleaching is mainly caused by:
- A. Ocean acidification
- B. Increased water temperature
- C. Increased upwelling
- D. Overfishing
5. Peat forms because:
- A. Waterlogged soils slow decomposition
- B. Fires add carbon to soils
- C. Trees grow fastest in wetlands
- D. Permafrost melts