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🧾 CBSE · Class 10

Class 10 Science: Our Environment Worksheet (with Answers)

A free, print-ready worksheet on Our Environment for CBSE Class 10 Science, with a matching answer key. Use the sample below, or build your own with the exact mix of questions you need — no login, no ads.

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Sample worksheet

7 of 17 questions from this chapter. Generate your own for the full set, more variations, and a clean print layout.

  1. 1. Green plants in an ecosystem are called:
    • (a) consumers
    • (b) decomposers
    • (c) predators
    • (d) producers
  2. 2. Bacteria and fungi that break down dead matter are:
    • (a) herbivores
    • (b) decomposers
    • (c) producers
    • (d) carnivores
  3. 3. The percentage of energy passed to the next trophic level is about:
    • (a) 90%
    • (b) 1%
    • (c) 10%
    • (d) 50%
  4. 4. Each step in a food chain is called a:
    • (a) trophic level
    • (b) biome
    • (c) niche
    • (d) habitat
  5. 5. What are the two main components of an ecosystem?
  6. 6. Give one reason food webs make ecosystems more stable than single food chains.
  7. 7. Explain the ten percent law of energy flow with an example.
View answers
  1. 1. (d) producers — Producers make their own food by photosynthesis.
  2. 2. (b) decomposers — Decomposers recycle nutrients from dead organisms.
  3. 3. (c) 10% — The ten percent law: ~10% is transferred.
  4. 4. (a) trophic level — Levels of energy transfer are trophic levels.
  5. 5. Biotic (living) and abiotic (non-living) components.
  6. 6. If one species is lost, organisms can feed on alternatives in the web, so the whole system is less likely to collapse.
  7. 7. When energy passes from one trophic level to the next, only about 10% is stored as usable energy at the higher level; the remaining ~90% is used for the organism's own life processes or lost as heat. For example, if producers store 1000 J, herbivores get about 100 J, and the carnivores eating them get only about 10 J. This loss limits food chains to a few levels.
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How it works

Every question is drawn from StudyMatic’s own Science bank for Our Environment — nothing is auto-generated or invented. Pick how many of each type you want, add your own questions if you like, choose 1–4 paper sets for anti-cheating, and print the worksheet and answer key separately or save them as PDF.

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FAQ

Is this Class 10 Science worksheet on Our Environment free?
Yes — it is completely free, with no login and no ads. You can print it or save it as a PDF, and generate unlimited variations.
Does the Our Environment worksheet come with answers?
Yes. Every worksheet has a separate answer key with the correct answers, short explanations and marks, so it is ready for marking.
Can I choose how many questions and which types?
Yes. Open the generator for this chapter and set how many MCQs, short, long and HOTS questions you want; totals and marks update live, and you can swap any single question.
Which board and class is this for?
This worksheet is aligned to CBSE Class 10 Science, chapter “Our Environment”.