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Syllabus

Ecosystems — Syllabus

ICSE · Class 8 · Biology

What Ecosystems covers in ICSE Class 8 Biology: 4 topics, for the 2026-27 session. Part of the ICSE Class 8 Biology syllabus.

44 questions30 flashcards5 formulas & key relations5 concepts

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A diagram illustrating the biotic and abiotic components of an ecosystem and their interactions.
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4 Topics · ICSE Class 8 Biology · 2026-27

Topics in Ecosystems

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1. Ecosystem and Its Components

  • An ecosystem is a self-contained area composed of all the different organisms living in it, interacting with each other, as well as interacting with the physical conditions such as sunlight, air, wate
  • The term ecosystem is derived from the Greek word Oikos, meaning house.
  • A forest ecosystem contains living components and non-living components.
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2. Trophic Levels, Producers, and Consumers

  • Food in an ecosystem moves through trophic levels, which are food-obtaining steps in a food chain.
  • Trophic level 1 consists of green plants, which are producers.
  • Trophic level 2 consists of herbivores or primary consumers.
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3. Food Chains

  • Food chain is the linear sequence of organisms in which each organism eats the lower member and is itself eaten by the next higher member.
  • A food chain may have 2 to 5 steps, very rarely 6, but never 7.
  • Some examples of food chains are Rice → Man, Grass → Rabbit → Fox, Maize → Goat → Man, Maize → Goat → Lion, Grass → Grasshopper → Lizard → Crow, and Grass → Buffalo → Leech.
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4. Food Webs and Their Importance

  • Food web is a network of several interconnecting food chains.
  • Food webs are complex and show many alternative feeding links.
  • The food web allows organisms to have more than one food source or more than one predator.

Key Concepts

Central concept: Ecosystem

Biotic componentsAbiotic componentsFood chainFood webTrophic levelsInterdependenceForest ecosystemFlora and fauna

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Frequently Asked Questions

What are the important topics in Ecosystems for ICSE Class 8 Biology?
Key topics in Ecosystems include Ecosystem and Its Components, Trophic Levels, Producers, and Consumers, Food Chains, Food Webs and Their Importance. Study these first, then practise questions on each for Class 8 exams.
How should I revise Ecosystems for Class 8 exams?
Learn the core ideas first, then work through the 44 practice questions on Ecosystems. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 8 Biology Syllabus

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