NCERT Class 7 Geography Chapter 1 - Environment Extra Questions

Chapter 1 - Environment Extra Questions

Multiple Choice Questions
1. Which one of the following is a basic life support system?
a) Music system
b) Environment
c) Transportation
d) None of these
Answer:
b) Environment

2. Which one of the following is created by nature?
a) Cars, scooters and buses
b) Mountains, rivers and trees
c) Roads, books, pen and copies
d) All of these
Answer:
b) Mountains, rivers and trees

3. The domain of water is referred to
a) hydrosphere
b) lithosphere
c) atmosphere
d) biosphere
Answer:
a) hydrosphere

4. What do plant and animal kingdom make together?
a) Biosphere
b) Hydrosphere
c) Atmosphere
d) All of these
Answer:
a) Biosphere

5. When is the World Environment Day celebrated every year?
a) 25th December
b) 23rd June
c) 26th January
d) 5th June
Answer:
d) 5th June

6. Who interacts with the environment and modify it according to their needs?
a) Human beings
b) Animals
c) Rivers
d) Mountains
Answer:
a) Human beings

7. Which one of the following is not a threat to environment?
a) Growing population
b) Growing plants
c) Growing industries
d) All of these
Answer:
b) Growing plants

Answer the following questions:
8. What is an ecosystem?
Answer:
An ecosystem is a system formed as a result of interaction of all living organisms with each other and physical & chemical factors of the environment in which they live.

9. What do you mean by the natural environment
Answer:
Natural Environment consists of land, water, air, plants, and animals. Thus natural environment refers to biotic (plants and animal) and abiotic (land) conditions that exist on the Earth.

10. Which are the major components of the environment?
Answer:
The major components of environment are - natural (land, air, water, living things), human made (building, parks, bridges, roads, industries, monuments etc) and human (individual, family, community, religion, educational, economics etc).

11. Give 4 examples of human made environment.
Answer:
Four examples of human made environment are buildings, parks, bridges, roads.

12. What is lithosphere?
Answer:
Lithosphere is a solid crust or the hard top layer of the Earth. It is made up of rocks and mineral and covered by a thin layer of soil. It is an irregular surface with various land forms such as mountains, plateaus and valleys etc.

13. Which are the two main components of biotic environment?
Answer:
Plants and animals are the 2 components of biotic component.

14. What is biosphere?
Answer:
Biosphere is a narrow zone of the Earth were land, water, and air interact with each other to support life. Thus, plants and animal kingdom together make biosphere i.e. the living world.

15. Give reasons
a) Man modifies his environment.
Answer:
Man modifies his environment to fulfill his needs and make his life comfortable. He also modifies his environment to adopt himself to natural surroundings

b) Plants and animals depend on each other.
Answer:
Plants and animals depend on each other for their own sake. Plants release oxygen that animal breathe and absorb carbon dioxide that animals release.

16. Define the term Barter system.
Answer:
Barter system is a trade in which goods are exchanged without the use of money.

Fill in the blanks
17.
Hydrosphere is a part of biosphere.

18. Two main constituents of environment are
natural and man-made.

19.
Lithosphere is the hard top layer of the earth.

20.
Human beings modify the natural environment.

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