Overview of the Environment Around Us
ICSE · Class 9 · Environmental Science
Summary of Overview of the Environment Around Us for ICSE Class 9 Environmental Science. Key concepts, important points, and chapter overview.
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Overview
Environment is the sum total of natural and human-made conditions that surround living organisms and influence their survival, growth, and activities. Earth functions as a life-supporting system because its air, water, land, living organisms, energy flow, and nutrient cycles continuously interact. T
Key Concepts
Environment includes all external conditions
Environment includes all external conditions, both natural and human-made, that surround living organisms. Its scope includes physical environment, bi
Earth is the only known planet
Earth is the only known planet in the universe that supports life. It has unique physical, chemical, and biological conditions that maintain suitable
Earth revolves around the Sun at
Earth revolves around the Sun at an ideal distance called the habitable zone. This keeps the surface temperature moderate so water remains in liquid f
Water is known as the universal
Water is known as the universal solvent. Large water bodies absorb and release heat slowly, which reduces extreme temperature variations and helps reg
The atmosphere is the envelope
The atmosphere is the envelope of gases surrounding Earth. It mainly contains nitrogen, oxygen, carbon dioxide, and water vapour. It supplies oxygen f
Learning Objectives
- Understand the meaning and scope of environment
- Identify Earth as a life-supporting planet and explain the conditions that make life possible
- Describe the major components of the environment: lithosphere, hydrosphere, atmosphere, cryosphere, and biosphere
- Explain the interaction between biotic and abiotic components
- Understand energy flow and nutrient cycling in ecosystems
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