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Environment Summary Class 7 Geography Chapter 1

Environment

  • Environment originated from French word Environer/Environner meaning “neighbourhood”.
  • Anything that surrounds any living organism is called environment.
  • Components of Environment:
    • Natural: Air (Atmosphere), Water (Hydrosphere), Land (Lithosphere), Living things (Biosphere).
    • Human interactions:  Individual, Family, Society, Religion, Education, Political Situation, Economic.
    • Human made: Parks, Buildings, Bridges, Roads, Industries, Monuments.

Natural Environment

Anything surrounds any living organism which was not made by humans is a part of Natural Environment.

  • Both biotic (living organisms) and abiotic (non-living organisms) are included in natural environment.
  • The natural environment is classified into various domains:
    • Lithosphere
    • Hydrosphere
    • Atmosphere
    • Biosphere

Lithosphere

  • It is the solid crust or the hard top layer of the earth.
  • It is made up of rocks and minerals and covered by a thin layer of soil.
  • It is an irregular surface with various landforms such as mountains, plateaus, plains, valleys, etc.
  • This domain provides us forests, grasslands for grazing, land for agriculture and human settlements.
  • It is also a source of mineral wealth.

Hydrosphere

  • Hydrosphere is the domain of water.
  • It comprises various sources of water and different types of water bodies like rivers, lakes, seas, oceans, etc.
  • It is essential for all living organisms.

Atmosphere

  • The atmosphere is the thin layer of air that surrounds the earth.
  • It consists of a number of gases, dust and water vapour.
    • The changes in the atmosphere produce changes in the weather and climate.
  • The gravitational force of the earth holds the atmosphere around it.
  • It protects us from the harmful rays and scorching heat of the sun.

Biosphere

  • The living world is called Biosphere.
    • The plant and animal kingdom together make biosphere.
  • It is a narrow zone of the earth where land, water and air interact with each other to support life.

Ecosystem

  • It is a system formed by the interaction of all living organisms with each other and with the physical and chemical factors of the environment in which they live, all linked by transfer of energy and material.
  • All plants, animals and human beings depend on each other and their immediate surroundings form an ecosystem..
  • There could be an ecosystem of large rain forest, grassland, desert, mountains, lake, river, ocean and even a small pond.

Human Environment

  • Human beings interact with the environment and modify it according to their need.
  • With time human needs grew and became more varied.
  • Humans learn new ways to use and change environment.
    • They learn to grow crops, domesticate animals and lead a settled life.
    • The wheel was invented, surplus food was produced, barter system emerged, trade started and commerce developed.
    • Industrial revolution enabled large scale production.
    • Transportation became faster.
    • Information revolution made communication easier and speedy across the world.
The document Environment Summary Class 7 Geography Chapter 1 is a part of the Class 7 Course Social Studies (SST) Class 7.
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FAQs on Environment Summary Class 7 Geography Chapter 1

1. What is the importance of environment in our lives?
Ans. The environment is crucial for our survival and well-being as it provides us with resources like air, water, and food. It also offers various ecosystem services like climate regulation, waste decomposition, and pollination, which are essential for maintaining a balanced and healthy environment.
2. How does human activity negatively impact the environment?
Ans. Human activities such as deforestation, industrialization, and pollution release harmful substances into the environment, leading to air, water, and soil pollution. These activities also contribute to climate change, loss of biodiversity, and depletion of natural resources, causing long-term damage to the environment.
3. What are the measures we can take to protect the environment?
Ans. To protect the environment, we can adopt sustainable practices like conserving water and electricity, reducing waste generation, recycling, and reusing materials. Planting trees, promoting renewable energy sources, and supporting eco-friendly initiatives are also effective measures to safeguard the environment.
4. How does climate change affect the environment and human health?
Ans. Climate change leads to rising temperatures, changing rainfall patterns, and extreme weather events like hurricanes and droughts. These changes can disrupt ecosystems, leading to habitat loss and species extinction. Additionally, climate change can also impact human health by increasing the spread of diseases, causing heat-related illnesses, and affecting food security.
5. How can individuals contribute to sustainable development and environmental conservation?
Ans. Individuals can contribute to sustainable development and environmental conservation by adopting eco-friendly practices in their daily lives. This includes using public transportation, reducing carbon footprint, practicing responsible consumption, and supporting organizations working towards environmental protection. Additionally, raising awareness, educating others, and actively participating in community initiatives can also make a significant difference.
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