Biogeochemical Cycle Test Review

Biogeochemical cycles :

• only include processes conducted by or within living organisms
• pertain only to the abiotic environment
• describe the movement of nutrients throughout the abiotic and biotic environment
• only pertain to exchanges and interactions that occur within the atmosphere

Approximately what percentage of the atmosphere is N2?

• 0.03%
• 78%
• 10%
• 30%

All organic compounds have which element? (element of life)

• carbon
• phosphorus
• water
• nitrogen

Bacteria turn atmospheric nitrogen into a form of nitrogen useable by plants through the process of

• bacteria fixation
• nitrogen fixation
• denitrification

Which cycle most likely includes sunlight, photosynthesis, and respiration?

• water cycle
• carbon cycle
• phosphorus cycle
• nitrogen cycle

Without this cycle, biogeochemical cycles would cease.

• water cycle
• carbon cycle
• phosphorus cycle
• nitrogen cycle

Through which process do living organisms release carbon into the atmosphere?

• cellular respiration
• combustion
• transpiration
• decomposition

Which nutrient needs to be fixed prior to use by producers and consumers?

• carbon
• water
• nitrogen
• sulfur

Combustion reactions in which hydrocarbons are burned, occur in the _______ cycle?

• nitrogen
• water
• phosphorus
• carbon

In terms of the water cycle, how do living things contribute to it?

• evaporation
• condensation
• precipitation
• transpiration