Phosphorus cycle worksheet - Free Printable

The image provided is a diagram of the Phosphorus Cycle, which illustrates how phosphorus moves through the environment, including land, water, and living organisms. The task appears to involve filling in the missing labels in the diagram. Below is an explanation of the phosphorus cycle and the solution to the problem.

---

Key Components of the Phosphorus Cycle

1. Producers and Consumers Die and Undergo Decomposition: When plants (producers) and animals (consumers) die, their organic matter decomposes, releasing phosphorus back into the soil or water.
2. Geologic Uplift: Over time, geological processes like uplift bring buried phosphate-containing rocks to the surface.
3. Weathering of Rocks: The exposed phosphate-containing rocks undergo weathering, gradually releasing soluble phosphates (PO₄³⁻) into the soil or water.
4. Runoff: Rainwater carries dissolved phosphates from the soil into rivers, lakes, and oceans.
5. Consumption: Plants absorb dissolved phosphates from the soil or water for growth. Animals consume plants, thereby incorporating phosphorus into their bodies.
6. Decomposition: When organisms die, decomposers break down their remains, returning phosphorus to the soil or water.
7. Plankton Uptake: In aquatic environments, plankton absorbs dissolved phosphates for growth.
8. Sedimentation: Phosphates can settle at the bottom of water bodies as sediments, eventually forming new rock layers over millions of years.
9. Phosphate Return to Soil or Water: Phosphates are continuously cycled between soil, water, and living organisms.
10. Phosphorus Moves in the Form of Dust and Sea Spray: Wind and sea spray can transport phosphorus particles (dust) across long distances.

---

Solution to the Missing Labels

Based on the context of the phosphorus cycle and the flow of phosphorus in the diagram, the missing labels can be filled as follows:

1. Top Left Blank: This area represents the process where phosphorus is released from decomposing organisms. The label should be:
- Decomposition

2. Middle Left Blank: This area shows the movement of phosphorus from the soil into water bodies due to runoff. The label should be:
- Runoff

3. Middle Right Blank: This area represents the process by which plants and algae in aquatic environments absorb dissolved phosphates. The label should be:
- Uptake

4. Bottom Middle Blank: This area shows the process where phosphates settle at the bottom of water bodies as sediments. The label should be:
- Sedimentation

5. Bottom Right Blank: This area represents the burial of phosphorus-rich sediments, which may eventually form new rock layers through geological processes. The label should be:
- Burial

---

Final Filled Diagram

Here is the completed diagram with the missing labels filled in:

1. Top Left: Decomposition
2. Middle Left: Runoff
3. Middle Right: Uptake
4. Bottom Middle: Sedimentation
5. Bottom Right: Burial

---

Explanation of the Solution

- Decomposition: This is the primary process by which phosphorus is released from dead organisms back into the environment.
- Runoff: This process transports phosphorus from land to water bodies, contributing to nutrient cycling.
- Uptake: Aquatic organisms, such as plankton, absorb dissolved phosphates for growth.
- Sedimentation: Phosphates settle at the bottom of water bodies, forming sediments that may eventually become part of rock formations.
- Burial: Over time, these sedimentary deposits are buried and may contribute to the formation of new phosphate-containing rocks.

By understanding these processes, we can see how phosphorus cycles through the environment, supporting life on Earth.

---

Final Answer

\[
\boxed{\text{Decomposition, Runoff, Uptake, Sedimentation, Burial}}
\]