Environment | NMMS Revision Notes | Class 7 Social

  

• Environment is the basic life support system that helps us live.
• The nature, place, people, things, etc. that surround the living organisms make the environment.
• It has three components: Natural, human and human-made.
• It is a combination of both natural as well as man-made phenomena.
• Natural environment comprises biotic and abiotic conditions, whereas the man-made phenomena comprises the activities and interactions among human beings.
• Biotic conditions refer to the living organisms and abiotic conditions refer to the non-living elements.

• Natural Environment:

(i) Lang, water, air, plants and animals comprise the natural environment.

(ii) Lithosphere, atmosphere, hydrosphere and biosphere are the four domains of the natural environment.

(iii) Lithosphere is the solid crust or the hard top layer of the earth. It is made up of rocks and minerals and has a thin layer of soil on top. It contains landforms like mountains, plateaus, plains and valleys.

(iv) Hydrosphere is the domain of water. It comprises water bodies like rivers, lakes, seas, oceans, etc. It is essential for life.

(v) The atmosphere is the thin layer of earth that surrounds the earth. It protects us from the harmful rays and scorching heat of the sun. The gravitational force of the earth holds the atmosphere around it. The changes in the atmosphere create the weather and climate.

(vi) Biosphere is a narrow zone of the earth where land, water and air interact with each other to support life. Both the Plant and Animal Kingdoms make up the biosphere.

• What is Ecosystem?

(i) The relation between the living organisms and the relation between the organisms and their surroundings form the ecosystem. The ecosystem is the biological community of interacting organisms and their physical environment.

(ii) There could be an ecosystem of a large rain-forest, grassland, desert, mountains, lake, river, ocean and even a small pond.

• Human Environment:

(i) Human beings interact with the environment and modify it according to their needs.

(ii) Early humans adapted themselves to their natural surroundings. They learned to invent the wheel, grow crops, domesticate animals, hunt and gather food.

(iii) With time, trade and commerce flourished and the barter system emerged.

(iv) Industrial revolution, transportation and information revolution and information made communication easier and speedy across the world.

(v) Humans need to maintain a perfect balance between natural environment and themselves. Humans must learn to live and use their environment in a harmonious way.

For More :-

CBSE Class–VII  | CHAPTER – 1 Integers |  NMMS  Revision Notes  à Click Here

Tracing Changes Through a Thousand Years | NMMS Revision Notes | Class 7 | Social  à Click Here

New Kings and Kingdoms | NMMS Revision Notes | Class 7 | Social  à Click Here

The Delhi Sultanate | NMMS Revision Notes | Class 7 Social à Click Here

The Mughal Empire | NMMS Revision Notes | Class 7 Social à Click Here

Tribes Nomads and Settled Communities | NMMS Revision Notes | Class 7 Social à Click Here

Devotional Paths to the Divine | NMMS Revision Notes | Class 7 Social à Click Here

The Making of Regional Cultures | NMMS Revision Notes | Class 7 Social à Click Here

Eighteenth Century Political Formations | NMMS Revision Notes | Class 7 Social à Click Here

Environment | NMMS Revision Notes | Class 7 Social à Click Here

Inside Our Earth | NMMS Revision Notes | Class 7 Social à Click Here

Our Changing Earth | NMMS Revision Notes | Class 7 Social à Click Here

Air | NMMS Revision Notes | Class 7 Social  à Click Here

Water | NMMS Revision Notes | Class 7 Social à Click Here

Human Environment Interactions the Tropical | NMMS Revison Notes | Class 7 Social à Click Here

Life in the Deserts | NMMS Revision Notes | Class 7 Social à Click Here

On Equality | NMMS Revision Notes | Class 7 Social à Click Here

How the State Government Works | NMMS Revision Notes | Class 7 Social à Click Here

Role of the Government in Health | NMMS Revision Notes | Class 7 Social à Click Here

Growing up as Boys and Girls | NMMS Revision Notes | Class 7 Social à Click Here

Women Change the World | NMMS Revision Notes | Class 7 Social à Click Here

Understanding Media | NMMS Revision Notes | Class 7 Social à Click Here

Markets Around Us | NMMS Revision Notes | Class 7 Social à Click Here

A Shirt in the Market | NMMS Revision Notes | Class 7 Social à Click Here

Nutrition in Plants | NMMS Revision Notes | Class 7 Science à Click Here

Nutrition in Animals | NMMS Revision Notes | Class 7 Science à Click Here

Heat | NMMS Revision Notes | Class 7 Science à Click Here

Acids Bases And Salts | NMMS Revision Notes | Class 7 Science à Click Here

Physical And Chemical Changes | NMMS Revision Notes | Class 7 Science  à Click Here

Respiration In Organisms | NMMS Revision Notes | Class 7 Science à Click Here     

Transportation in Animals and Plants | NMMS Revision Notes | Class 7 Science à Click Here

Force and Pressure | NMMS Quick  Revision Notes | Class: 8 Physics à Click Here

Reproduction In Plants | NMMS Revision Notes | Class 7 Science à Click Here

Motion And Time | NMMS Revision Notes | Class 7 Science à Click Here

Electric Current and its Effects | NMMS Revision Notes | Class 7 Science à Click Here

Light | NMMS Revision Notes | Class 7 Science à Click Here

Waste Water Story | NMMS Revision Notes | Class 7 Science à Click Here

How When and Where | NMMS Revision Notes | Class 8 Social à Click Here

From Trade to Territory | NMMS Revision Notes | Class 8 Social à Click Here

Ruling the Countryside | NMMS Revision Notes | Class 8 Social à Click Here

Tribals Dikus and Vision of Golden Age | NMMS Revision Notes | Class 8 Social à Click Here

When People Rebel | NMMS Revision Notes | Class 8 Social à Click Here

Weavers Iron Smelters and Factory Owners | NMMS Revision Notes | Class 8 Social à Click Here

Civilising the Native Educating the Nation | NMMS Revision Notes | Class 8 Social à Click Here

Women Caste and Reform | NMMS Revision Notes | Class 8 Social à Click Here