Biology·Organisms & their environment · NSSCO 5.2
The carbon & nitrogen cycles
Narrated lesson · press play
How nature recycles its elements — the carbon cycle of photosynthesis, respiration and combustion, how humans upset it, and the nitrogen cycle powered by four kinds of soil bacteria.
What you'll learn in this lesson
By the end you should be able to (NSSCO Biology 5.2):
- Describe the carbon cycle (photosynthesis, respiration, feeding, decomposition, combustion)
- Discuss the effects of burning fossil fuels and deforestation on the oxygen/carbon dioxide balance
- Describe the nitrogen cycle and the roles of microorganisms (fixation, nitrification, denitrification, decomposition)
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Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.