CourseCourseConceptConceptDocsDocuments

IB ESS HL 2.2.29 Hl Entropy in Ecosystems Questions

Explain how cellular respiration and heat loss increase entropy as biomass passes through a food chain while living systems maintain organisation.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • explain entropy as increasing disorder when food-chain energy transformations dissipate chemical energy as heat
  • explain how cellular respiration releases heat, allowing organisms to maintain low internal entropy while increasing entropy in the wider ecosystem

Learn this topic

Study 2.2.29 (HL)—Entropy in ecosystems conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 2.2.29 Hl Entropy in Ecosystems Questions question 1

[Maximum number: 2]
Energy flow through an ecosystem

Figure:Energy flow through an ecosystem

the ecosystem energy-flow diagram shown above below shows the energy flow in an ecosystem. The width of the arrows is proportional to the quantity of energy transferred.

Explain how entropy is increased by each energy transformation that takes place in the food chain.

All question bank results loaded