Question

1. which biogeochemical cycle does not take place in the atmosphere?

○ nitrogen cycle
○ hydrologic cycle
○ carbon cycle
○ phosphorus cycle

Explanation:

The nitrogen, hydrologic (water), and carbon cycles all have key stages that occur in the atmosphere: nitrogen exists as atmospheric N₂, water evaporates into the atmosphere as vapor, and carbon moves as CO₂ in the atmosphere. The phosphorus cycle is sedimentary-based, moving through rocks, soil, water, and organisms with no significant atmospheric component.

Answer:

D. phosphorus cycle