Question

Which one of the following will accelerate phosphorus cycle?

• A. Burning of fossil fuels
• B. Volcanic Activity
• C. Weathering of rocks
• D. Rainfall and storms

Answer 1

The Correct Option is C

The phosphorus cycle is a crucial part of both ecological systems and geological processes. Unlike other biogeochemical cycles, the phosphorus cycle is primarily sedimentary as it doesn't include a gaseous phase for atmospheric phosphorus. Therefore, processes that accelerate the phosphorus cycle involve the release of phosphorus from physical sources which then becomes available to biological systems.

Explanation:

1. Burning of fossil fuels: Primarily affects the carbon, nitrogen, and sulfur cycles but has little direct impact on the phosphorus cycle.

2. Volcanic Activity: Can introduce phosphorus into the environment but is not a consistent or primary method of phosphorus cycling on a global scale.

3. Weathering of rocks: This process is the primary driver of the of the phosphorus cycle on land. Phosphorus exists in rocks in the form of phosphate ions and is released through the weathering of rocks and minerals. As rocks weather, they release phosphate ions which are then available for uptake by plants, entering the biological ecosystem.

4. Rainfall and storms: Can cause erosion and transport of phosphorus but doesn't directly increase the bioavailability of phosphorus.

Given these points, the most effective way to accelerate the phosphorus cycle is through the weathering of rocks.