Solutions Chapter 1. Environment - NCERT Exercise | Class 7 Geography - Toppers Study

Solutions Chapter 1. Environment - NCERT Exercise | Class 7 Geography - Toppers Study

Q1. 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?

Answer:

(i) The system formed by the interaction between living organism themself and between living organism and their surroundings is called an ecosystem.

(ii) All those things which are naturally existing around us are together called natural enviorment.

(iii) Major enviorments are:                                                        (a) natural components                                                            (b) human-made components                                                      (c) activities and interaction of humans being                                     

(iv) Bridges, parks, building etc.

(v) Lithosphere is the hard top layers of the earth.

(vi) Plants and animals.

(vii) A narrow zone on the earth where land, air and water support life by interaction with each other is called biosphere.                                 

Q2. 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

Answer:

(i) (b) Aquarium.

(ii) (a) Land

(iii) (c) Road

(iv) (b) Growing population.

Q3. 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 land water and air interact
(f) relation between the organisms and their surroundings

Answer:

Q4. Give reasons.
(i) Man modifies his environment
(ii) Plants and animals depend on each other

Answer:

(i) Man modifies his enviorment to meet his various needs. For example: he clears forests for obtaining land foragriculturew and for making shelter. He extracts minerals from the earth for making various things. He makes dams for producing electricity. These are a few of the ways in which man modifies his enviorment.

(ii) Animals, whether carnivores or herbivores, ultimately depend on plants for their food. Also, plants provide fresh oxygen to animals to breathe in. These keep the enviorment clean and provide shelter to a number of animals. On the other hand, animals provide carbon doxide which plants usde for making their food  
Q5. Activity.
Imagine an ideal environment where you would love to live. Draw the picture of
your ideal environment.