Lesson Y7-U06-L01

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 is an ecosystem?

    • A single species of animal living on its own in a forest
    • A climate graph showing rainfall and temperature for one year at a weather station in a desert
    • A map showing the borders between different biomes
    • All the living things and their surroundings in one place, working together

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

    • Bacteria and frogs that live in ponds
    • Fungi and earthworms
    • Soil, water, air or sunlight
    • Trees, birds and insects

  3. What is a producer in an ecosystem?

    • A living thing that breaks down dead plants and animals
    • A plant that makes its own food using sunlight
    • A bird that carries seeds from one tree to another
    • An animal that hunts other animals for food

  4. What is a consumer?

    • A fungus that grows on dead wood in a forest
    • A plant that takes in food through its roots and stores it in its leaves for winter
    • An animal that eats plants or other animals for energy
    • A non-living part of an ecosystem such as water

  5. What is a decomposer?

    • A living thing that breaks down dead plants and animals
    • A layer of soil that stops rain from draining away
    • An animal that stores food for the winter months
    • A plant that grows in the shade of a larger tree and uses the light that filters down

  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 a producer?

    • A bluebell growing in a woodland
    • An earthworm living in the soil of a woodland
    • A grey squirrel eating nuts
    • A blue tit feeding on insects

  8. Which list contains only living things?

    • A frog, an oak tree and a beetle
    • Soil, a beetle and sunlight
    • Water, sunlight and soil, which together make up the ecosystem's food supply
    • A frog, water and an oak tree

  9. In a pond food chain of algae, pond snail and perch, which living thing is the consumer that eats the snail?

    • The algae
    • The mud at the bottom of the pond
    • The perch
    • The sunlight shining on the water

  10. In the food chain grass, rabbit, fox, which way does the arrow from the rabbit point?

    • To the fox, which eats the rabbit
    • To the sunlight that the grass needs
    • To the grass, which the rabbit eats
    • To the soil where the rabbit digs its burrow

  11. Which of these food chains is written in the correct order?

    • Oak leaf, then caterpillar, then blue tit
    • Caterpillar, then oak leaf, then blue tit
    • Blue tit, then caterpillar, then oak leaf
    • Blue tit, then oak leaf, then caterpillar

  12. A fox eats rabbits, mice and beetles. What does this show about its place in the ecosystem?

    • A food web is needed, because one animal can eat several different food sources
    • The fox has no effect on any other animal in the woodland
    • Rabbits are decomposers that break down dead foxes, returning nutrients to the soil of the woodland
    • The fox is a producer that makes food from sunlight

  13. A heron eats frogs, frogs eat tadpoles and tadpoles eat pond plants. If all the pond plants die, what happens first to the tadpoles?

    • They become producers and start making their own food, using energy from the rain and the soil
    • They lose their food source, so their numbers are likely to fall
    • They gain energy directly from the sunlight on the water
    • Nothing changes, because tadpoles do not depend on plants

  14. A woodland has oak trees, earthworms and fungi on the forest floor. Which pairing is correct?

    • Earthworms are producers, and fungi are consumers
    • Oak tree is a producer, and fungi are decomposers
    • Oak tree is a consumer, and fungi are producers
    • Oak tree is a decomposer, and earthworms are producers

  15. A new beetle arrives in a park and eats mainly grass seeds. Which role does it most likely have in the ecosystem?

    • A non-living part of the ecosystem
    • A producer
    • A consumer
    • A decomposer

  16. Which statement about the removal of dead leaves and wood from a woodland floor is most accurate?

    • It would harm decomposers, which need dead material to break down and recycle nutrients
    • It would make the oak trees stronger, because they use the dead leaves
    • It would have no effect on any living thing in the woodland, because all plants can survive without litter
    • It would help decomposers, which grow best in bare soil with no litter

  17. Which statement about sunlight in an ecosystem is correct?

    • Sunlight is eaten by producers and passed on to consumers, which then pass it to decomposers in turn
    • Sunlight is a consumer because plants take it in from the air
    • Sunlight is a living part of the ecosystem because it helps plants grow
    • Sunlight is non-living, but it powers producers that start almost every food chain

  18. A new fish is added to a pond and eats almost all the tadpoles. Which prediction is most likely?

    • Frog numbers rise, because the fish eats the frogs' predators
    • Frog numbers fall, because fewer tadpoles survive to become adult frogs
    • The heron gets no food, because it can never eat fish or any other animal from the pond
    • The pond plants die, because the fish blocks the sunlight

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

    • All species in a web are producers, so losing one changes nothing
    • Each species eats only one food, so losing one has no effect on any other animal in the pond
    • Food webs contain only decomposers, which are never eaten by anything
    • The species are linked, so losing one changes the food available to others

  20. Biotic and abiotic are words used to describe parts of an ecosystem. Which pair is correct?

    • Both words describe only the water in a pond
    • Biotic means living, and abiotic means non-living
    • Biotic means non-living, and abiotic means living
    • Abiotic means the animals that eat producers

All KS3 Geography quizzes