Cambridge IGCSE Combined Science practice

Paper 3 structured question: Energy flow

Try the question first, then check the answer and practise the same topic again.

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Paper

Marks

Topic

Energy flow

Exam-style question

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Paper 3Theory (Core)3 marks

Understanding energy loss in ecosystems is crucial for ecological studies.

Description

As energy moves through an ecosystem, a significant amount is lost at each trophic level.

a
Discuss the reasons why energy is lost as it moves through a food chain.
Your answer
Aim for approximately 3 distinct marking points.
[3]

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Paper 3Theory (Core)3 marks

Description

Energy from the Sun is captured by plants and transferred through various trophic levels in an ecosystem.

a
Explain how energy is transferred from the Sun to herbivores in an ecosystem.
Your answer
Aim for approximately 3 distinct marking points.
[3]