Evidence for climate change and its causes Quiz
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5 questions, one answer each
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1. Which is the best explanation of why air bubbles in ice cores can be used to find past carbon dioxide concentrations?
- A. They contain a sample of the atmosphere at the time the layer formed
- B. They contain only carbon dioxide
- C. They are formed by bacteria in the ice
- D. They show the temperature directly
2. A student states that a rise in global temperature has been caused by the rise in carbon dioxide because the two are correlated. What is the most important weakness in this reasoning?
- A. The data cover too many years
- B. Correlation alone does not show causation; a mechanism and other evidence are also needed
- C. Carbon dioxide is not a greenhouse gas
- D. Temperature cannot be measured accurately
3. Which observation about a tree ring would best support the inference of a cold, dry year?
- A. A very wide ring
- B. A ring with many resin canals
- C. A very narrow ring
- D. A ring of normal width
4. Which activity increases atmospheric methane?
- A. Burning coal
- B. Growing rice in flooded paddies
- C. Planting forests
- D. Using wind turbines
5. Draining and burning a peat bog increases atmospheric carbon dioxide mainly because:
- A. peat absorbs carbon dioxide from the air
- B. pollen releases carbon dioxide
- C. bogs produce oxygen only
- D. stored carbon in the peat is released by decomposition and combustion