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In NCERT Class 7 Geography Chapter 1 talks about Environment. The environment is our basic life support system. It provides the air we breathe, the water we drink, the food we eat and the land where we live. Students also learn about the ecosystem, natural environment, hydrosphere, atmosphere, and more. In this blog, we will provide you with CBSE Class 7 Geography Chapter 1 Environment notes, important definitions and solved questions.
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Also Read: Which Region Receives the Most Rainfall in India?
Important Definitions in NCERT Class 7 Geography Chapter 1
- Environment: The place, people, things and nature that surround any living organism is called the environment.
- Biotic: The world of living organisms. e.g. plants and animals.
- Abiotic: The world of non-living elements. e.g. land.
- 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.
- Hydrosphere: The domain of water is referred to as hydrosphere. 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. The gravitational force of the earth holds the atmosphere around it.
- Biosphere: Plant and animal kingdoms together make the biosphere or the living world. 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 the transfer of energy and material.
- Barter System: It is a trade in which goods are exchanged without the use of money.
Read about Layers of Atmosphere in this blog!
Download Social Science Class 7 Geography Chapter 1 Important Questions and Answers PDF
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Important Questions in NCERT Class 7 Geography Chapter 1: Free PDF Download
1. Answer the following questions.
(i) What is an ecosystem?
Ans: An Ecosystem is 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 the transfer of energy and material.
(ii) What do you mean by natural environment?
Ans: The Natural Environment consists of basic components and organisms that are naturally present in the environment without any human involvement, like the land, water, air, plants and animals.
(iii) Which are the major components of the environment?
Ans. Major components of the environment include
- Natural Components (Air, Water, Land and Living things)
- Human-made Components (Components created by human beings)
- Human Components (Human populations
(iv) Give four examples of a human-made environment.
Ans: Four examples of a human-made environment are buildings, parks, industries and bridges.
(v) What is lithosphere?
Ans: The lithosphere 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.
(vi) Which are the two major components of biotic environment?
Ans: Animals and Plants are the two major components of a biotic environment.
(vii) What is the biosphere?
Ans: Plant and animal kingdoms together make the biosphere or the living world. It is a narrow zone of the earth where land, water and air interact with each other to support life.
2. Tick the correct answer.
(i) Which is not a natural ecosystem?
(a) Desert
(b) Aquarium
(c) Forest
Ans: b
(ii) Which is not a component of the human environment?
(a) Land
(b) Religion
(c) Community
Ans: a
(iii) Which is a human-made environment?
(a) Mountain
(b) Sea
(c) Road
Ans: c
(iv) Which is a threat to the environment?
(a) Growing plant
(b) Growing population
(c) Growing crops
Ans: b
3. Match the following.
| (i) Biosphere | (a) blanket of air which surrounds the earth |
| (ii) Atmosphere | (b) domain of water |
| (iii) Hydrosphere | (c) gravitational force of the earth |
| (iv) Environment | (d) our surroundings |
| (e) narrow zone where the land water and the air interacts | |
| (f) relation between the organisms and their surroundings |
Ans:
| (i) Biosphere | (e) narrow zone where the land water and the air interacts |
| (ii) Atmosphere | (a) blanket of air which surrounds the earth |
| (iii) Hydrosphere | (b) domain of water |
| (iv) Environment | (d) our surroundings |
4. Give reasons.
(i) Man modifies his environment.
Ans: Man modifies his environment to fulfil his basic needs, as it is the basic life support system. He builds houses to live in and industries to work in, which modifies the environment and also its mineral wealth. Humans have used the fossils for their own development, disturbing the ecological system and animal habitats.
(ii) Plants and animals depend on each other.
Ans: Plants and animals are interdependent on each other because plants are the producers, and animals are the consumers. Plants release oxygen in the atmosphere, which is inhaled by human beings and humans exhale carbon dioxide, which helps plants in producing their own food.
Explore Notes of All subjects of CBSE Class 7:-
| CBSE NCERT Notes Class 7 English | CBSE NCERT Notes Class 7 History | CBSE NCERT Notes Class 7 Geography |
| CBSE NCERT Notes Class 7 Civics | CBSE NCERT Notes Class 7 Mathematics | CBSE NCERT Notes Class 7 Science |
Check out Class 6 Geography Notes:
FAQs
The atmosphere is the thin layer of air that surrounds the earth. The gravitational force of the earth holds the atmosphere around it.
Plant and animal kingdoms together make the biosphere or the living world. It is a narrow zone of the earth where land, water and air interact with each other to support life.
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 the transfer of energy and material.
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