Carbon cycle (Edexcel GCSE Biology): Flashcards

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Carbon cycle
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Carbon cycle

Movement of carbon through atmosphere, organisms, and back

Key biological molecules containing carbon

Proteins, carbohydrates, and fats

Process removing CO2CO_2 from atmosphere

Photosynthesis

Process returning CO2CO_2 to atmosphere (all organisms do this)

Respiration

Burning fuels to release CO2CO_2

Combustion

Examples of fossil fuels

Coal, oil, and natural gas

How carbon passes through food chain

Feeding (animals eating plants or other animals)

Organisms breaking down dead plants and animals

Decomposers and detritivores

Types of decomposer microorganisms

Bacteria and fungi

Carbon transformation in photosynthesis

CO2CO_2 → Glucose

Carbon transformation in respiration

Glucose → CO2CO_2

Carbon transformation in combustion

Fuel → CO2CO_2

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