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Revision Notes

How Nature Works in Harmony

CBSE · Class 8 · Science

Quick revision notes for How Nature Works in Harmony — CBSE Class 8 Science. Key concepts, formulas, and definitions for last-minute revision.

45 questions88 flashcards5 concepts

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Key Topics to Revise

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1. Habitat, Biotic and Abiotic Components

  • A habitat is a place where an organism lives and gets the right conditions for survival.
  • Examples of habitats include the bark of a tree, a pond, a forest, and farmland.
  • Biotic components are living beings in a habitat, such as plants, animals, and microorganisms.
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2. Population, Community, and Ecosystem

  • A population is a group of the same kind of organisms living together in a habitat at a given time.
  • A community comprises different populations sharing the same habitat.
  • An ecosystem is formed by the interaction of biotic and abiotic components in an area.
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3. Producers, Consumers, and Decomposers

  • Green plants make their own food by photosynthesis and are called producers or autotrophs.
  • Consumers or heterotrophs cannot make their own food and depend on others for food.
  • Herbivores eat only plants, such as deer and hare.
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4. Food Chain, Food Web, and Trophic Levels

  • A food chain is a simple sequence showing who eats whom in an ecosystem.
  • Grass → Grasshopper → Frog → Snake → Eagle is an example of a food chain.
  • Food chains are often linear, but in nature many chains are connected.

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Full Notes

Key Concepts

A habitat is a place whereBiotic components are living beings suchA population is a groupA community comprises different populations sharingAn ecosystem is formed when biotic

Frequently Asked Questions

What are the important topics in How Nature Works in Harmony for CBSE Class 8 Science?
How Nature Works in Harmony covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in How Nature Works in Harmony — CBSE Class 8 Science?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and 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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