Effects of climate change and modelling Quiz
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5 questions, one answer each
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1. A trend line fitted to 30 years of data is extended 80 years ahead. Which is the main reason for caution?
- A. The line was drawn by hand
- B. The pattern may not continue because of feedback processes and changing emissions
- C. Extrapolation always gives the right answer
- D. Data from 30 years cannot be graphed
2. Which change is a likely effect of a warmer climate on rainfall?
- A. Rainfall becomes equal everywhere
- B. No change in any region
- C. More intense rain in some regions and longer droughts in others
- D. Rain falls only in winter
3. The rate of a reaction in a beetle larva is 20 units at 10 °C and 50 units at 20 °C. What is Q10?
- A. 0.4
- B. 2.5
- C. 30
- D. 5.0
4. Why does the rate of enzyme-catalysed reactions fall above the optimum temperature?
- A. Substrate molecules are used up
- B. Enzyme molecules have less kinetic energy
- C. The enzymes denature as bonds break and the active site changes shape
- D. The activation energy increases
5. A bird feeds its chicks on caterpillars whose emergence is now 14 days earlier than before, while the bird breeds only 4 days earlier. What is the most likely effect on the bird population?
- A. It will rise because the chicks hatch earlier
- B. Breeding success will fall as the chicks hatch after the peak of food
- C. It will be unaffected
- D. The caterpillars will be eaten faster