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Revision Notes

Biosphere (Ecosystem) and Biomes

Telangana Open School (TOSS) · Class 12 · Geography

Quick revision notes for Biosphere (Ecosystem) and Biomes — Telangana Open School (TOSS) Class 12 Geography. Key concepts, formulas, and definitions for last-minute revision.

45 questions30 flashcards5 concepts

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Key Topics to Revise

1

1. Biosphere and Its Components

  • The biosphere includes all regions of Earth's surface, atmosphere, and hydrosphere where life exists.
  • It consists of biotic (living) and abiotic (non-living) components that interact continuously.
  • Hierarchy of ecological organization: Individual → Population → Community → Ecosystem → Biome → Biosphere.
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2. Ecosystems and Their Types

  • An ecosystem is a community of living organisms interacting with each other and their physical environment.
  • Ecosystems are classified into terrestrial and aquatic types based on habitat.
  • Terrestrial ecosystems include forests, grasslands, deserts, and tundra.
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3. Food Chain and Food Web

  • A food chain shows a linear transfer of energy from producers to consumers.
  • Producers (plants) → Primary consumers (herbivores) → Secondary → Tertiary → Quaternary consumers.
  • Decomposers break down dead matter and recycle nutrients.
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4. Biomes and Their Types

  • A biome is a large geographical area with similar climate, flora, and fauna.
  • Biomes are classified into terrestrial and aquatic types.
  • Major terrestrial biomes: Forests, Grasslands, Deserts, Tundra.

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Full Notes

Key Concepts

The biosphere is the global ecologicalAn ecosystem consists of a communityA food chain shows a linearA biome is a large geographicalBiodiversity refers to the variety

Frequently Asked Questions

What are the important topics in Biosphere (Ecosystem) and Biomes for Telangana Open School (TOSS) Class 12 Geography?
Biosphere (Ecosystem) and Biomes covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Biosphere (Ecosystem) and Biomes — Telangana Open School (TOSS) Class 12 Geography?
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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