Lesson Y7-U06-L01

What Is an Ecosystem? Quiz: KS3 Geography, Unit 6

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson Y7-U06-L01, What Is an Ecosystem?: 20 multiple choice questions for the KS3 Geography (National Curriculum), Unit 6: Year 7: Ecosystems and Biomes, written with Revision Ninja.

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The 20 questions

  1. What two core components make up any ecosystem?

    • Plants and animals only
    • Producers and consumers
    • Rocks and water only
    • Living and non-living parts

  2. Which of these is a non-living part of an ecosystem?

    • Fungi
    • Oak tree
    • Soil
    • Earthworm

  3. What term describes a plant that makes its own food using sunlight?

    • Decomposer
    • Producer
    • Predator
    • Consumer

  4. What term describes an animal that eats other living things for energy?

    • Decomposer
    • Producer
    • Consumer
    • Mineral

  5. What is the primary function of a decomposer in an ecosystem?

    • Breaking down dead matter
    • Absorbing water from soil
    • Consuming live plants
    • Producing energy from sunlight

  6. What do we call the home where a plant or animal lives?

    • A habitat
    • An ecosystem
    • A food chain
    • A biome

  7. Which of these living things is classified as a producer?

    • Bluebell
    • Fox
    • Badger
    • Earthworm

  8. Which list contains only living organisms?

    • Frog, oak tree, beetle
    • Frog, river, pebble
    • Tree, soil, rock
    • Water, air, beetle

  9. In a pond chain of algae, snail and perch, what role does the perch play?

    • Producer
    • Abiotic factor
    • Consumer
    • Decomposer

  10. In a food chain diagram, which way do the arrows point?

    • Towards the eater
    • Towards the sun
    • Towards the producer
    • Downwards only

  11. Which component always starts a correct food chain order?

    • Producer
    • Decomposer
    • Top predator
    • Secondary consumer

  12. What is a network of interconnected food chains in an ecosystem called?

    • Food web
    • Biotic pyramid
    • Trophic loop
    • Food chain

  13. If all pond plants die in a pond ecosystem, what happens first to the tadpoles?

    • They become producers
    • Numbers fall
    • Numbers increase rapidly
    • Nothing changes

  14. In a woodland, what ecological role do fungi on the forest floor play?

    • Abiotic factors
    • Decomposers
    • Producers
    • Primary consumers

  15. What role does an animal that eats grass seeds have in an ecosystem?

    • Abiotic factor
    • Producer
    • Consumer
    • Decomposer

  16. What group of organisms is most directly harmed by removing dead wood from a woodland floor?

    • Decomposers
    • Carnivores
    • Herbivores
    • Producers

  17. Which term describes sunlight within an ecosystem?

    • Biotic factor
    • Consumer
    • Producer
    • Abiotic factor

  18. What typically happens to frog populations if most tadpoles are eaten by fish?

    • They rise
    • They fall
    • They double
    • They stay the same

  19. Why does removing one species often impact many others in a food web?

    • Ecosystems are static
    • Species are unrelated
    • Populations never change
    • Species are interdependent

  20. In ecology, what does the term biotic mean?

    • Artificial
    • Living
    • Non-living
    • Synthetic

All KS3 Geography quizzes