 |
| 1 | |
What are the five main stores for carbon? |
| | A) | living organisms, oceans, rocks, fossil fuels, and the atmosphere |
| | B) | metals, non-metals, glass fibres, plastics, and synthetic fabrics |
| | C) | plastic, paper, metal, wood, and glass |
| | D) | carbon dioxide, carbon monoxide, carbon compounds, carbon-based substances, and carbon paper |
|
|
|
| 2 | |
What is the name of a natural process that exchanges matter and energy between the abiotic and biotic environment? |
| | A) | nitrogen fixation |
| | B) | store |
| | C) | biogeochemical cycle |
| | D) | reservoir |
|
|
|
| 3 | |
What is the name of the process by which atmospheric nitrogen is changed into forms that can be used by plants? |
| | A) | nitrate fixation |
| | B) | ammonium fixation |
| | C) | nitrogen fixation |
| | D) | nitrogen conversion |
|
|
|
| 4 | |
In a balanced carbon budget, how does the rate at which carbon dioxide enters the atmosphere compare with the rate at which it exits? |
| | A) | Carbon dioxide enters the atmosphere at a higher rate than it exits the atmosphere. |
| | B) | Carbon dioxide enters the atmosphere at a slower rate than it exits the atmosphere. |
| | C) | The rate at which carbon dioxide enters the atmosphere is approximately equal to the rate at which it exits. |
| | D) | In a balanced carbon budget, carbon dioxide enters the atmosphere, becomes a part of the atmosphere, and is never released. |
|
|
|
| 5 | |
Nitrogen fixation converts nitrogen gas into compounds that contain… |
| | A) | nitrate or carbon dioxide. |
| | B) | nitrate or ammonium. |
| | C) | nitrate or water. |
| | D) | nitrate or methane. |
|
|
|
| 6 | |
Human activities that impact the nitrogen cycle are classified under three major categories. What are they? |
| | A) | activities that add nitrogen to land, activities that add nitrogen to water, and activities that add nitrogen to the atmosphere |
| | B) | activities that reduce nitrogen from land, activities that reduce dissolved nitrogen from water, and activities that reduce nitrogen from the atmosphere |
| | C) | activities that completely remove nitrogen from land, activities that completely remove dissolved nitrogen from water, and activities that completely remove nitrogen from the atmosphere |
| | D) | activities used to detect nitrogen in land, activities used to detect nitrogen in water, and activities used to detect nitrogen in the atmosphere |
|
|
.