CBSE Class 7 Geography Environment Worksheet Set A

Read and download free pdf of CBSE Class 7 Geography Environment Worksheet Set A. Students and teachers of Class 7 Social Science can get free printable Worksheets for Class 7 Social Science in PDF format prepared as per the latest syllabus and examination pattern in your schools. Standard 7 students should practice questions and answers given here for Social Science in Grade 7 which will help them to improve your knowledge of all important chapters and its topics. Students should also download free pdf of Class 7 Social Science Worksheets prepared by school teachers as per the latest NCERT, CBSE, KVS books and syllabus issued this academic year and solve important problems provided here with solutions on daily basis to get more score in school exams and tests

Environment Class 7 Social Science Worksheet Pdf

Class 7 Social Science students should refer to the following printable worksheet in Pdf for Environment in standard 7. This test paper with questions and answers for Grade 7 Social Science will be very useful for exams and help you to score good marks

Class 7 Social Science Worksheet for Environment

Environment
 

Tick the correct Answer.

(i) Which is not a natural ecosystem?
(a) Desert
(b) Aquarium
(c) Forest
Answer : B

(ii) Which is not a component of human environment?
(a) Land
(b) Religion
(c) Community
Answer : A

(iii) Which is a human made environment?
(a) Mountain
(b) Sea
(c) Road
Answer : C

(iv) Which is a threat to environment?
(a) Growing plant
(b) Growing population
(c) Growing crops
Answer : B

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

Short answer question

Question.What is an Ecosystem?
Answer : 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.

Question. What do you mean by natural environment?
Answer : 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.

Question. Which are the major components of the environment?
Answer : Components of the environment include

Natural Components (Air, Water, Land & Living things)
1. Human Made Components (components created by human beings)
2. Human Components (human populations)

Question. Give four examples of a human-made environment.
Answer : Four examples of the human-made environment are buildings, parks, industries and bridges.

Question. What is lithosphere?
Answer : 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.

Question. Which are the two major components of the biotic environment?
Answer : Plants and animals are the two major components of the biotic environment.

Question. What is Biosphere?
Answer : 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 kingdom together form the biosphere.

Short Answer

Question. How do humans beings modify natural environment ?
Answer : Man modifies his environment to fulfill 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.

Question. How do Plants and animals depend on each other?
Answer : 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

LONG ANSWER QUESTION:-

Question. Give an account of various domains of the environment?
Answer : Various domains of the environment are:
(a)LithosphereThe solid portion of the earth is called the Lithosphere.It comprises the rocks of the earth’s crust and the thin layers oFsoil that contain nutrient elements which sustain organisms.

(b)Atmosphere The Atmosphere is a domain that consists of layers which are the troposphere, stratosphere, mesosphere, thermosphere as well as the exosphere. Lifeform sustains on troposphere which is the first layer of the atmosphere. The density of Atmosphere is maximum at sea level and decreases with increasing height. The atmosphere consists of 78% Nitrogen, 21% oxygen and other gases like Argon, Carbon dioxide as well as some other gases comprise 1% of the volume.

(c)Hydrosphere Hydrosphere is a domain that contains water or water bodies. If we take the earth into consideration. Only 1/4th (29%) of the earth is covered in soil/land while the rest 3/4th (71%) portion is covered in water. 97% of the earth’s water is found in oceans and is not suitable for use as it is saltwater.

(d)Biosphere – The Domain of Life
The biosphere is the narrow zone of contact between the land, water and air.
It is the zone where life exists that makes this planet unique.


Question. What do you understand by environment?
Answer : Environment means the surroundings and natural forces on earth. It includes land, water, air etc.
 
Question. Which are the main spheres of environment?
Answer : 1. Atmosphere 2. Lithosphere 3.Hydrosphere 4. Biosphere.
7th SS Eng. Medium 2021-22 ( Solved Whole Year). 1
 
Question. How do man affects environment?
Answer : Man affects the environment by using its resources according to his needs. Developments in transportation, agriculture and industry has changed the world into ‘Global Market’.
 
Question. Write down the names of layers of earth.
Answer : 1. SIAL (Silicon+ Aluminium)
2. SIMA (Silicon+ Magnesium)
3. NiFe (Nickel+ Ferrous/Iron)


Fill in the Blanks

1. Environment has been divided in four spheres. 
2. The SIAL layer of the Earth is made up of the material which is rich in Silicon and Aluminium
3. NiFe is made up of material which is rich in Nickel and Ferrous elements. 
4. The different types of species of animals is known as Animal Kingdom
5. 71% Portion of earth has been covered by hydrosphere.


More question-

Fill in the blanks:

1. The solid crust or the hard top layer of the earth is ______________________.

2. The domain of water is referred to as __________________________.

3. A thin layer of air that surrounds the earth is __________________________.

4. ___________________________ is a trade in which goods are exchanged without the use of money.

5. ______________________ is a narrow zone of the earth where land, water and air interact with each other to support life.

6. The world of non-living elements are called ________________________.

7. The world of living organisms are called ___________________________.

8. __________________________ is our basic life support system.

9. The place, people, things and nature that surround any living organisms is called _____________________________.

10. _____________ , ______________ , _________, ______________ and _________________ comprise the natural environment.

11. _______________________ is made up of rocks and minerals and covered by a thin layer of soil.

12. ____________________ are found over the continents and also on the ocean floors.

13. ______________________ is also a source of mineral wealth.

14. The ________________________________ of the earth holds the atmosphere around it.

15. ______________________________ means neighbourhood.

16. Plants and animal kingdom together makes _________________________________.

17. On ____________________ every year World Environment Day is celebrated.

 

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