Phosphorus Cycle, Carbon Cycle, & Nitrogen Cycle
The Phosphorus Cycle
- this cycle is slow and does not usually occur in the atmosphere because phosphorus rarely occurs as a gas
Phosphorus - an element that is part of many molecules that make up the cells of living organisms.
The Carbon Cycle
- enters a long-term cycle
- may be converted in carbonates
Phosphorus moves from phosphate deposits in rock to the land, then to living organisms, and finally the ocean.
Nitrogen could not be cycled in the atmosphere without nitrogen-fixing bacteria.
Carbon exists in air, water, soil and living organisms.
The Nitrogen Cycle
Nitrogen-Fixing Bacteria - a few species of bacteria that are the only organisms that can fix atmospheric nitrogen into chemical compounds.