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NCERT Solutions for Class 7 Geography Social Science Chapter 1 Environment

The environment encompasses both living and nonliving elements surrounding us, including physical, chemical, and natural forces. It comprises land, water, air, plants, and animals. Human interaction with the environment leads to modifications according to their requirements. The NCERT Solutions for Chapter 1 in Class 7 Geography are valuable resources designed to elucidate and resolve complex concepts for students. These solutions serve as ideal study materials to clarify doubts and ensure a comprehensive understanding of the subject matter.

Environment

Question 1 :

Give reasons.

(i) Man modifies his environment.

 

(ii) Plants and animals depend on each other.

Answer :

(i) 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 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.

 


Question 2 :

Answer the following questions.

(i) What is an ecosystem?

 

(ii) What do you mean by natural environment?

 

(iii) Which are the major components of the environment?

 

(iv) Give four examples of a human-made environment.

 

(v) What is lithosphere?

 

(vi) Which are the two major components of the biotic environment?

 

(vii) What is a biosphere?

 

 

 

Answer :

(i) The 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, is called an ecosystem.

(ii) The basic components and organisms that are naturally present in the environment without any human involvement, like the land, water, air, plants and animals, comprise the natural environment.

(iii)  Components of the environment include

  1. Natural Components (Air, Water, Land and Living things)

  2. Human-made Components (Components created by human beings)

  3. Human Components (Human populations)

(iv) Four examples of the human-made environment are buildings, parks, industries and bridges.

(v) The solid crust or the hard top layer of the earth is called the lithosphere. It is made up of rocks and minerals and is covered by a thin layer of soil. It is an irregular surface with various landforms like mountains, plateaus, plains, etc.

(vi) Plants and animals are the two major components of the biotic environment.

(vii) Biosphere or the living world is the narrow zone of earth where land, water and air interact with each other to support life. The plant and animal kingdoms together form the biosphere.

 


Question 3 :

Tick the correct answer.

(i) Which is not a natural ecosystem?

     (a) Desert

     (b) Aquarium

     (c) Forest

(ii) Which is not a component of the human environment?

     (a) Land

     (b) Religion

     (c) Community

(iii) Which is a human-made environment?

     (a) Mountain

     (b) Sea

     (c) Road

(iv) Which is a threat to the environment?

     (a) Growing plant

     (b) Growing population

     (c) Growing crops

 

Answer :

(i)   b

 

(ii)  a

 

(iii) c

 

(iv) b

 


Question 4 :

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

 

Answer :

 

(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

 


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