Exploring Ecosystems & Food Chains
Science
GCSE Foundation
14 questions
~28 mins
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A worksheet covering Ecosystems & Food Chains for GCSE Foundation students.
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Exploring Ecosystems & Food Chains
Subject: ScienceGrade: GCSE Foundation
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Untitled Worksheet
Grade GCSE Foundation
A
Questions
Answer all questions. Show your working where appropriate.
1.
What is an ecosystem?
[2 marks]2.
Which of the following is a producer in a food chain?
[1 mark]AGrass
BRabbit
CFox
DHawk
3.
True or False: Carnivores are animals that only eat plants.
[1 mark]4.
Explain the role of decomposers in an ecosystem.
[3 marks]5.
Match the following terms to their definitions:
[3 marks]1. Producer
2. Consumer
3. Decomposer
AAn organism that produces its own food through photosynthesis.
BAn organism that breaks down dead or decaying organisms.
CAn organism that obtains energy by eating other organisms.
6.
Order the following stages in a simple food chain: Fox, Grass, Rabbit.
[2 marks]1
2
3
4
5
7.
Fill in the blank: _______ are organisms that can make their own food using sunlight.
[1 mark]8.
Calculate the energy available to a secondary consumer if the producer has 10,000 J of energy and the energy transfer efficiency is 10%.
[3 marks]9.
Discuss the impact of removing a top predator from an ecosystem.
[6 marks]10.
True or False: All energy transferred in a food chain is used by the organisms.
[1 mark]11.
What is a food chain?
[2 marks]12.
Describe the relationship between a predator and its prey.
[3 marks]13.
Which of the following best describes a tertiary consumer?
[1 mark]AAn organism that makes its own food
BAn organism that decomposes organic material
CAn organism at the top of the food chain that preys on secondary consumers
DAn organism that only eats plants
14.
Identify two factors that can affect the size of a population in an ecosystem.
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- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
- worksheet