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Important Questions - Chapter 1 - Environment, Class 7, Social Science PDF Download

NCERT (CBSE) solutions of Class VII Social Science (Geography)
Chapter 1 Environment
(Important Questions only)
 
Q.1: 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 human made environment.
      (v)   What is lithosphere?
     (vi)   Which are the two major components of biotic environment?
     (vii)    What is biosphere?
Solution:
       (i)  Ecosystem is the system formed by the interaction of all living things with one another and with the physical and chemical factors of the environment in which they live linked by transfer of energy and material.
     (ii) By natural environment we mean the surroundings created by the nature. It comprises of the objects such as - mountains, plateaus, plains, valleys, forests, land, air, river, ocean, water and all living and non-living things etc.
       (iii) Major components of the environment include -
  • Natural Components like, Land (Lithosphere), Water (Hydrosphere), Air (Atmosphere), Living things (Organism).
  • Human made Components like, buildings, parks, bridge, road, industries etc.
  • Humans like, individuals, family, community, religion, politics, education etc.      
       (iv)  Examples of human made environment are like, buildings, parks, bridge, road, industries etc.    
      (v)  Lithosphere is the hard top layer of the earth or crust consisting of rocks and minerals extending both over the continents and ocean basins.
      (vi)  The two basic components of biotic environment are: Plants and Animals.
    (vii) Biosphere: Plants and animals found in the narrow strip at the junction of lithosphere, atmosphere and hydrosphere together make biosphere.
    
Q.2: Tick the correct answer.
 (i) Which is not a natural ecosystem?
a.       Desert
b.      Aquarium
c.       Forest
 (ii) Which is not a component of 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 environment?
a.       Growing plant
b.      Growing population
c.       Growing crops.
Solution:  (i) b (ii) a (iii) c (iv) b
 
Q.3: Match the following.
 
  (i) Biosphere
 (ii) Atmosphere
(iii) Hydrosphere
(iv) Environment
(a) blanket of air which surrounds the Earth
(b) domain of water
(c) air surroundings
(d) narrow zone where land, air and water interact
 
Solution: (i)d (ii)a (iii)b (iv)c
 
Q.4: Give reasons.
(a) Man modifies his environment.
(b) Plants and animals depend on each other.
Solution:
(a) It is true that man modifies his environment. It is because - 
  • He uses water. 
  • Deforestation by which he clears land for agriculture, industries and habitation. 
  • He tills land for agriculture. 
  • He uses air. 
  • Numerous activities made to make the life comfortable.
(b) The interdependence of plants and animals can be illustrated by the following points:
  • Plants provide food to animals. 
  • Forests provide shelter to wild life. 
  • Wildlife adds beauty to forests. 
  • Animal dung provides manure for the growth of plants. 
  • The decay of dead animals provides nutrition to soil which in turn helps in the growth of plants and trees.  
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FAQs on Important Questions - Chapter 1 - Environment, Class 7, Social Science

1. What is environment?
Ans. Environment refers to the natural world around us, including both living and non-living components. This includes the air we breathe, the water we drink, the soil we walk on, and the plants and animals that share our planet.
2. Why is it important to study the environment?
Ans. It is important to study the environment because we rely on it for our survival. By understanding how the natural world works, we can make better decisions about how to manage our resources and protect our planet for future generations.
3. What are some of the major environmental problems facing the world today?
Ans. Some of the major environmental problems facing the world today include climate change, deforestation, pollution, habitat loss, and overfishing. These issues are all interconnected and have far-reaching impacts on both human and animal populations.
4. What can individuals do to help protect the environment?
Ans. Individuals can help protect the environment by making small changes in their daily lives, such as reducing their use of single-use plastics, conserving water, and using public transportation or carpooling instead of driving alone. They can also support policies and organizations that work to protect the environment.
5. How can we ensure a sustainable future for our planet?
Ans. Ensuring a sustainable future for our planet requires a multi-faceted approach that involves both individual actions and systemic change. This includes reducing our carbon footprint, investing in renewable energy, protecting biodiversity and natural resources, and promoting social and economic equity.
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