Nutrient cycles Quiz
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5 questions, one answer each
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1. Which process takes carbon dioxide out of the atmosphere?
- A. Respiration
- B. Combustion
- C. Photosynthesis
- D. Decomposition
2. Bacteria in the root nodules of clover change nitrogen gas into ammonium compounds. What is this called?
- A. Nitrogen fixation
- B. Denitrification
- C. Nitrification
- D. Transpiration
3. What is the correct order for the water cycle?
- A. Evaporation, condensation, precipitation
- B. Condensation, evaporation, precipitation
- C. Precipitation, evaporation, condensation
- D. Evaporation, precipitation, condensation
4. Why does waterlogged soil often lose nitrates?
- A. Plants release nitrates into the air
- B. Nitrifying bacteria destroy them
- C. Rain evaporates them
- D. Denitrifying bacteria turn them into nitrogen gas
5. Which process returns carbon dioxide to the air when a dead animal is broken down?
- A. Photosynthesis by decomposers
- B. Respiration by decomposers
- C. Nitrogen fixation
- D. Precipitation