GCSE level School biology notes: Carbon, nitrogen & water cycles, factors affecting decay rate

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Carbon Cycle, Nitrogen Cycle, Water Cycle, Decomposition - decomposers and useful decay - What are they all about?

All is explained , including experimental investigations

Doc Brown's GCSE level biology exam revision study notes

Sub-index for this section on natural cycles and decomposition

(1) Introduction to natural cycles in the Earth's biosphere

(2) The Carbon Cycle

(3) The Nitrogen Cycle

(4) The Water Cycle

(5) Decomposition - importance, factors affecting rate of decay of material by decomposers

(6) An experiment to investigate the effect of temperature on the rate of decay of milk

(7) Biogas from waste: process, generator designs, rate factors, 'pros and cons, biofuels'

(8) Making compost - a natural organic fertiliser

(9) Fungal and bacterial decay and methods of food preservation

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See also

Ecosystems - biotic & abiotic factors - interactions between organisms - interdependency

Food chains, food webs and biomass

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