IGCSEScienceCambridge (CIE)Co-ordinated Sciences (Double Award)BiologyRevision Notes18. Organisms & Their EnvironmentEnergy & Feeding RelationshipsTransfer of Energy

Transfer of Energy (Cambridge (CIE) IGCSE Co-ordinated Sciences (Double Award): Biology): Revision Note

Exam code: 0654 & 0973

Written by: Lára Marie McIvor

Reviewed by: Lucy Kirkham

Updated on 2 July 2026

Transfer of Energy

The Sun is the principal source of energy input to biological systems
Energy flows through living organisms
- Including light energy from the Sun and chemical energy in organisms
- Energy is eventually transferred to the environment eg. as heat

Food chain, IGCSE & GCSE Biology revision notes

Energy is transferred from the sun and through the food chain

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Author: Lára Marie McIvor

Expertise: Content Creator

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.

Reviewer: Lucy Kirkham

Expertise: Content Creator

Lucy has been a passionate Maths teacher for over 12 years, teaching maths across the UK and abroad helping to engage, interest and develop confidence in the subject at all levels.Working as a Head of Department and then Director of Maths, Lucy has advised schools and academy trusts in both Scotland and the East Midlands, where her role was to support and coach teachers to improve Maths teaching for all.