Climate change: causes and evidence Quiz
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5 questions, one answer each
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1. Which feature of peat bogs allows pollen to be preserved?
- A. Warm, dry, alkaline conditions
- B. Waterlogged, acidic, low-oxygen conditions
- C. High light intensity
- D. A high density of decomposers
2. A tree-ring series from a living tree is matched with that from an old beam. This is known as
- A. radiocarbon dating
- B. cross-dating
- C. proteomics
- D. extrapolation
3. Ice core bubbles show carbon dioxide stayed between 180 and 280 ppm for 800 000 years, but is now 421 ppm. Which is the best conclusion?
- A. The present concentration is outside the natural range of the last 800 000 years
- B. The rise must be due to a volcanic eruption
- C. The ice core data are unreliable
- D. Carbon dioxide has no effect on temperature
4. Temperature and carbon dioxide concentration have risen together. Which statement is correct?
- A. This proves carbon dioxide causes warming
- B. This is a correlation; the greenhouse effect gives a mechanism that supports a causal link
- C. This shows that temperature causes carbon dioxide to rise
- D. This is a coincidence
5. Which of these is a human source of methane?
- A. Rice paddies
- B. Photosynthesis in forests
- C. Burning of coal
- D. Ice core formation