5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Rabbits take in 3 000 kJ. Foxes eating rabbits gain 300 kJ. Calculate the efficiency of energy transfer.
(2)%
Total for this question: 2 marks
5(b) FEEDING RELATIONSHIPS · EXAM QUESTIONS
5.9 Energy transfer between trophic levels
9 exam-style questions. Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
Ratings are saved in this browser on this device, under a KS4 key kept separate from International A Level recall. Written answers are temporary and cleared when you leave the page. Use Reset to clear the ratings on this device.
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
A producer contains 87 000 kJ per m² per year. Primary consumers contain 14 000 kJ. Calculate the efficiency.
(2)%Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Explain why transfer efficiency between producers and herbivores is often low.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Illustrative data.
Energy at each trophic level Trophic level Energy / kJ per m² per year producer 25 000 primary consumer 2 500 secondary consumer 200 tertiary consumer 18 Illustrative data, not from a real investigation. Calculate the efficiency of transfer from primary to secondary consumers.
(2)%Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Energy at each trophic level Trophic level Energy / kJ per m² per year producer 25 000 primary consumer 2 500 secondary consumer 200 tertiary consumer 18 Illustrative data, not from a real investigation. Explain why efficiency from secondary to tertiary consumers is higher than from producers to primary consumers in some chains.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Explain why energy, unlike carbon, is not recycled in an ecosystem.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
A cow eats grass containing 100 MJ. 4 MJ is used for growth. Calculate the percentage efficiency.
(2)%Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Suggest why caterpillars transfer energy more efficiently than mice.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
5.9 Energy transfer between trophic levels
Exam question
Mark points shown after marking
Describe how to calculate efficiency of energy transfer.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks