Energy flow
Section: Biology | Syllabus: Cambridge IGCSE Combined Science (0653)
The Sun as the Energy Source
The Sun is the principal source of energy input to biological systems.
The Flow of Energy Through Living Organisms
- Light energy from the Sun is captured by producers and converted into chemical energy in organic molecules, through photosynthesis
- This chemical energy is passed from organism to organism when one organism is eaten by another
- At every stage, energy is eventually transferred to the environment, mostly as heat released during respiration
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