Summary
Carbon moves between atmosphere, organisms, oceans and rocks via photosynthesis, respiration and combustion.
In depth
Photosynthesis removes CO2, respiration, decomposition and combustion return it. Oceans absorb CO2, forming carbonic acid, and shells and fossil fuels store carbon for long periods. Burning fossil fuels moves carbon from slow geological pools to the atmosphere, raising CO2 from about 280 ppm before industry to over 420 ppm.
The fast cycle involves photosynthesis and respiration; the slow cycle involves weathering and geological processes. Methane from wetlands and livestock is another flux. Seasonal CO2 wiggles in the Keeling curve reflect Northern Hemisphere growth.
Key idea: fossil fuel burning adds carbon faster than natural sinks absorb it.
Frequently asked questions
What is Carbon Cycle?
Carbon moves between atmosphere, organisms, oceans and rocks via photosynthesis, respiration and combustion.
Which area of biology covers Carbon Cycle, and how advanced is it?
Carbon Cycle is one of the 54 topics in Ecology. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Nitrogen Cycle, Ecological Succession, Biogeochemical Modelling.
Can you give an example of Carbon Cycle?
Forests act as carbon sinks while growing.
What should I learn before Carbon Cycle?
Carbon Cycle is a Beginner topic, so no earlier topic is required. Other Beginner topics in Ecology that pair well with it include Ecology, Ecosystem, Biotic and Abiotic Factors.
What topics are related to Carbon Cycle?
The closest topics to Carbon Cycle are Nitrogen Cycle, Ecological Succession, Biogeochemical Modelling, Climate Change Ecology. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Carbon Cycle?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Carbon Cycle. To practise the whole of Ecology, use the Ecology quiz.
How is Carbon Cycle different from Nitrogen Cycle?
Carbon Cycle: Carbon moves between atmosphere, organisms, oceans and rocks via photosynthesis, respiration and combustion. Nitrogen Cycle: Bacteria convert nitrogen through fixation, nitrification, assimilation and denitrification so organisms can use it. Read both side by side and note what each one explains.
How should I study Carbon Cycle step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Nitrogen Cycle and explain the difference aloud. Finally, take the Ecology quiz and come back to this page for any question you miss.