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Overview of the Environment Around Us

ICSE · Class 9 · Environmental Science

Quick revision notes for Overview of the Environment Around Us — ICSE Class 9 Environmental Science. Key concepts, formulas, and definitions for last-minute revision.

57 questions48 flashcards5 concepts

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Key Topics to Revise

1

1. Environment: Meaning and Scope

  • The term environment is derived from the French word environ, meaning to surround.
  • Environment includes natural elements such as air, water, land, climate, plants, and animals, as well as human-made surroundings such as settlements and industries.
  • The scope of the environment includes physical environment, biological environment, human environment, natural resources, and ecosystems.
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2. Earth as a Life-Supporting Planet

  • Earth is described as a life-supporting planet because it has a unique combination of physical, chemical, and biological conditions.
  • Earth functions as a living system due to continuous interaction among land, water, air, and living organisms.
  • The Earth system includes lithosphere, hydrosphere, atmosphere, cryosphere, and biosphere.
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3. Major Components of the Environment

  • Lithosphere is the outer solid layer of the Earth, consisting of the crust and the uppermost part of the mantle.
  • Lithosphere includes continents, mountains, plateaus, plains, and the soil layer.
  • It provides the physical base for terrestrial life and supports agriculture, settlements, minerals, and fossil fuels.
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4. Interaction Between Biotic and Abiotic Components

  • The environment functions as a living system because biotic and abiotic components continuously interact.
  • Abiotic components are non-living physical and chemical factors such as air, water, soil, sunlight, temperature, and minerals.
  • Biotic components are living organisms such as plants, animals, human beings, bacteria, and fungi.

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Full Notes

Key Concepts

Environment includes all external conditionsEarth is the only known planetEarth revolves around the Sun atWater is known as the universalThe atmosphere is the envelope

Frequently Asked Questions

What are the important topics in Overview of the Environment Around Us for ICSE Class 9 Environmental Science?
Overview of the Environment Around Us covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Overview of the Environment Around Us — ICSE Class 9 Environmental Science?
Understand the core concepts first, then work through the 57 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.

More resources for Overview of the Environment Around Us

All 11 chapters — ICSE Class 9 Environmental Science Revision Notes

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