Exploring Ecosystems & Food Chains
Science
Year 8
15 questions
~30 mins
0 views0 downloads
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A worksheet covering Ecosystems & Food Chains for Year 8 students.
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Exploring Ecosystems & Food Chains
Subject: ScienceGrade: Year 8
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Untitled Worksheet
Grade Year 8
A
Questions
Answer all questions. Show your working where appropriate.
1.
Which of the following is a primary consumer?
[1 mark]ARabbit
BGrass
CFox
DEagle
2.
True or False: Plants are producers in the food chain.
[1 mark]3.
What is the role of decomposers in an ecosystem?
[2 marks]4.
Match the following terms to their definitions:
[3 marks]1. Producer
2. Consumer
3. Decomposer
AAn organism that breaks down dead material for energy.
BAn organism that makes its own food using sunlight.
CAn organism that eats other organisms for energy.
5.
Arrange the following organisms in the order they appear in a food chain: Grass, Owl, Mouse, Snake.
[2 marks]1
2
3
4
5
6.
Fill in the blank: In a food chain, energy flows from the ______ to the consumer.
[1 mark]7.
Explain the difference between a food chain and a food web.
[6 marks]8.
True or False: Energy is lost at each level of a food chain.
[1 mark]9.
Calculate the energy transfer efficiency if 1000J of energy is available at the producer level and 100J is available at the primary consumer level. Use the formula: Efficiency (%) = (Energy at next level / Energy at current level) * 100.
[3 marks]10.
Identify two abiotic factors that can affect an ecosystem.
[2 marks]11.
Describe how overfishing can impact a marine ecosystem.
[3 marks]12.
Which of the following is a tertiary consumer?
[1 mark]AGrass
BRabbit
CShark
DAlgae
13.
Evaluate the importance of biodiversity in maintaining the stability of ecosystems.
[6 marks]14.
Which of the following statements about food webs is correct?
[1 mark]AThey show a single chain of who eats whom.
BThey only include producers and consumers.
CThey show multiple interconnected food chains.
DThey exclude decomposers.
15.
What is one way humans can positively impact ecosystems?
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- Created
- 12/30/2025
- Updated
- 12/30/2025
- Type
- worksheet