Podcast
Questions and Answers
Which of the following is NOT a major reservoir in the carbon cycle?
Which of the following is NOT a major reservoir in the carbon cycle?
- Atmosphere
- Earth's crust
- Soil (correct)
- Ocean
Which bacteria are responsible for converting atmospheric nitrogen into usable forms?
Which bacteria are responsible for converting atmospheric nitrogen into usable forms?
- Lactobacilli
- Rhizobium (correct)
- Nitrobacter
- Streptococcus
- Escherichia coli
Which of the following statements correctly describes the phosphorus cycle?
Which of the following statements correctly describes the phosphorus cycle?
- Upwelling brings phosphorus-rich water from deeper layers to the surface. (correct)
- Phosphorus has a significant atmospheric phase, similar to the carbon cycle.
- Phosphorus is a key component of DNA and RNA. (correct)
- Phosphorus is readily available in most soil solutions due to its high solubility.
- Phosphorus is a crucial component of the nitrogen cycle.
What is the primary function of the nitrogen cycle?
What is the primary function of the nitrogen cycle?
What is the significance of a nutrient cycle?
What is the significance of a nutrient cycle?
Flashcards
Nutrient Cycle
Nutrient Cycle
A process describing how elements necessary for life move within ecosystems.
Reservoir
Reservoir
A location where nutrients are stored in an ecosystem.
Flux
Flux
The movement of nutrients from one reservoir to another.
Carbon Cycle
Carbon Cycle
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Nitrogen Fixation
Nitrogen Fixation
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Study Notes
Nutrient Cycles: The Basics
- Nutrient cycles describe how elements needed for life move around an ecosystem.
- These cycles involve biogeochemical processes, and understanding reservoirs and fluxes is key.
- A reservoir is the location of nutrients, while flux is the movement or process of moving nutrients.
Water Cycle
- Includes the hydrosphere
- Various reservoirs and fluxes
Carbon Cycle
- Earth's crust is the largest carbon holder
- Ocean and atmosphere also hold significant amounts of carbon
- Burning fossil fuels releases CO2 into the atmosphere.
Nitrogen Cycle
- Nitrogen gas (N2) is 78% of the atmosphere.
- Bacteria are essential for the cycle.
- Rhizobium bacteria live on plant roots (legumes).
- Nitrogen fixation converts N2 into usable forms.
Phosphorus Cycle
- Phosphorus has no atmospheric phase.
- Phosphate often sinks and is not readily soluble in soil.
- Upwelling and warmer water currents can bring phosphorus to the surface.
- Excess phosphorus can be problematic.
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