Biogeochemical cycles

In this topic

• What a biogeochemical cycle is, and its two types
• The water cycle and the carbon cycle
• The nitrogen cycle — it does not run without bacteria
• Oxygen, phosphorus, sulfur and the human share

Key terms

• Biogeochemical cycle
• Reservoir pool
• Gas-type cycle
• Sedimentary cycle
• Transpiration
• Nitrogen fixation
• Ammonification
• Nitrification
• Denitrification
• Eutrophication
• Limiting nutrient
• Greenhouse effect

Read the full topic

The lesson text, diagrams and 20 test questions are on the site — register free to open them.

UZRU