1What is a biogeochemical cycle?
The movement and recycling of chemical elements between organisms and the non-living environment
2Name two carbon stores
Any two of living biomass, soil, oceans, the atmosphere, fossil fuels or carbonate rocks
3What is a carbon sink?
A system that takes in more carbon than it releases over a given period
4What is a carbon source?
A system or process that releases more carbon than it takes in over a given period
5Which process takes carbon dioxide from the atmosphere into plant biomass?
Photosynthesis
6How does feeding move carbon through an ecosystem?
Carbon in the food is transferred from the organism eaten to the consumer
7How does burning fossil fuels affect atmospheric carbon dioxide?
It releases stored carbon as carbon dioxide, increasing atmospheric carbon dioxide
8What is the residence time of carbon in a store?
The average time a carbon atom remains in that store before leaving it