Biogeochemical cycles - carbon nitrogen water phosphorus - Question Bank
1. The transformation of water from a liquid to a gas state due to increased kinetic energy from solar radiation is known as:
2. Which of the following is NOT a direct human impact on the carbon cycle?
3. The slow geological process of phosphorus moving from land to oceans and back via rock formation is characteristic of:
4. Which process is responsible for converting nitrates back into nitrogen gas in anaerobic conditions?
5. The carbon stored in forests is primarily in the form of:
6. What is the main impact of eutrophication on aquatic ecosystems?
7. Which process in the nitrogen cycle converts organic nitrogen in dead organisms and waste products into ammonia?
8. What is the term for the movement of water from land surfaces into rivers, lakes, and oceans?
9. In the phosphorus cycle, the eventual return of phosphorus to rocks occurs through:
10. What is the primary source of energy driving the water cycle?
11. The symbiotic relationship between Rhizobium bacteria and leguminous plants is crucial for:
12. Which of the following is a key function of the carbon cycle in Earth's climate system?
13. The process of converting dissolved organic matter back into inorganic nutrients is called:
14. What is the main form of phosphorus found in oceanic waters, which is then utilized by phytoplankton?
15. Sedimentary rocks are the primary reservoir for which element's cycle?
16. Which component of the water cycle involves the movement of water through the soil and rock layers underground?
17. The process of assimilation in the nitrogen cycle refers to:
18. What is the primary role of decomposers (like bacteria and fungi) in the nitrogen cycle?
19. The water cycle is also known as the:
20. Which type of bacteria performs denitrification?
21. In the carbon cycle, what is the role of chemosynthesis?
22. The process of ammonification involves the conversion of organic nitrogen into:
23. Which of the following is a major source of human-induced phosphorus pollution?
24. Deforestation can lead to increased soil erosion, which in turn can affect the availability of which nutrient in aquatic systems?
25. Acid rain, primarily caused by the release of sulfur dioxide and nitrogen oxides, impacts which biogeochemical cycles?
26. Excessive use of nitrogen fertilizers in agriculture can lead to:
27. The Haber-Bosch process, used for industrial production of ammonia, has significantly altered which biogeochemical cycle?
28. Which of the following human activities significantly contributes to the release of CO2 into the atmosphere?
29. Human activities like deforestation and burning of fossil fuels primarily affect which part of the carbon cycle?
30. Which of the following is a consequence of the human impact on the carbon cycle?
31. The excessive addition of phosphorus to aquatic ecosystems, leading to algal blooms and eutrophication, is known as:
32. What is the main process by which phosphorus is released from rocks into the environment?
33. Plants absorb phosphorus mainly in the form of:
34. Unlike carbon, nitrogen, and water, the phosphorus cycle has a significant reservoir in:
35. Phosphorus is primarily found in rocks and soil in the form of:
36. Which of the following is a major reservoir for water on Earth?
37. The release of water vapor from plants into the atmosphere is known as:
38. Water falling back to Earth in the form of rain, snow, sleet, or hail is called:
39. What is the process by which water vapor in the atmosphere cools and changes into liquid water, forming clouds?
40. The process of water moving from the Earth's surface into the atmosphere as vapor is called:
41. Plants primarily absorb nitrogen in which form?
42. Which process returns nitrogen from nitrates back to the atmosphere as nitrogen gas (N2)?
43. The conversion of ammonia (NH3) to nitrites (NO2-) and then to nitrates (NO3-) is known as:
44. Which microorganisms are primarily responsible for biological nitrogen fixation?
45. Which process converts atmospheric nitrogen (N2) into ammonia (NH3), making it available for plants?
46. What is the main role of nitrogen in living organisms?
47. Which of the following is a major reservoir of carbon on Earth?
48. The process by which decomposers break down dead organic matter, releasing carbon back into the environment, is called:
49. What is the primary process by which carbon is removed from the atmosphere and converted into organic matter?
50. Which of the following is the most abundant form of carbon in the Earth's atmosphere?