8.2: The Phosphorus Cycle

Question 1

Why is the phosphorus cycle important?

Answer 1

• phosphorus is important for the formation of nucleic acids, phospholipids and ATP (energy)

Question 2

What is the most important inorganic form of phosphorus?

Answer 2

• phosphate (PO4-3)

Question 3

What are the largest reservoirs of phosphorus? (3)

Answer 3

• sedimentary rocks of marine origin
• the oceans
• organisms

Question 4

How does phosphate move? (2)

Answer 4

• binds with soil particles

- movement is often localized