CBSE Class 7 Social Science Geography Our Changing earth Assignment

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Assignment for Class 7 Social Science Our Environment Chapter 3 Our Changing Earth

Class 7 Social Science students should refer to the following printable assignment in Pdf for Our Environment Chapter 3 Our Changing Earth in Class 7. This test paper with questions and answers for Class 7 Social Science will be very useful for exams and help you to score good marks

Our Environment Chapter 3 Our Changing Earth Class 7 Social Science Assignment

 

The Internal and External Face Of the Earth
 
Give answer to the following questions approximately in 1- 15 words
 
Q 1. How many shells of the earth are there? Name them.
Ans. There are three shells of the earth: - 1. Lithosphere (crust) 2. Mantle, 3. Core.
7th SS Eng. Medium 2021-22 ( Solved Whole Year). 2
 
Q 2. How many types of rocks are found on the earth?
Ans. Basically, there are three types of rocks:-
1. Igneous 2. Sedimentary 3. Metamorphic
 
Q 3. Write down about the Mantle part of the earth.
Ans. Below the upper layers of earth is Mantle. It is 2900 km deep. It is also called SIMA because of its’ main elements Silicon and Magnesium.
 
Q 4. By which name the innermost part of the earth called? What are the components of this part?
Ans. The innermost part of the earth is called ’Core’. The core known as NiFe, mainly consists of two elements Nickel (Ni) & Ferrous (Fe).
 
Q 5. How can we avoid soil erosion?
Ans. 1. By planting new trees 2. By adopting better agricultural practices 3. By checking over grazing etc.
 
Give answer to the following questions approximately in 50-60 words
 
Q 6. What are igneous rocks? How many types are there in these rocks? Write about the intrusive rocks.
Ans. ‘Igneous’ means fire. These rock are of two types:-1. Intrusive 2.Extrusive
These rocks are formed out of the cooling of the hot and liquid material from the interior of the Earth.
Intrusive Igneous rocks: - Rocks formed by the cooling of the Magma, in the interior of the earth are called as Intrusive Rocks.
 
Q 7. What are the Sedimentary ocks? How many types are there of these rocks?
Ans. These rocks are formed by the hardening of the layers of the matter brought by agents of denudation (like water, air and river etc.).
There are three types of sedimentary rocks: - 1. Clastic 2. Chemical 3. Organic.
 
Q 8. Write about the metamorphic rocks, give specific example of these rocks.
Ans. As a result of the effect of temperature and pressure, igneous rocks and sedimentary rocks undergo a change in their form, structure and hardness. Such transformed rocks are called metamorphic rocks. Examples: - Marble, slate, coal etc.
 
Q 9. What kind of mineral is Mica? For what purpose is it used?
Ans. Mica is a non-metallic mineral. It is used in making electric goods. It is also used in making lamps, paints, radars, rubber, paper, aeroplanes etc.
 
Q 10. Which mineral is called as 'Liquid Gold'? Give brief introduction.
Ans. Petroleum is called as ‘Liquid Gold’. It is made out of the vegetation and animals trapped between layers of sedimentary rocks. It is refined in refineries before use.
 
Q 11. Write down the importance of the soil on the earth.
Ans. Fertile soil has always been very important for human civilizations. The fertile soils of Indus, Nile etc. led to the development of the civilizations. Even today high density of population is found in fertile river valleys and plains.
 

 

OUR CHANGING EARTH

1. What are the earthquake waves called?

2. What happens when lithospheric plates move slowly?

3. Which type of force is responsible for the formation of mountains?

4. Which machine is used to measure the intensity of the earthquake?

5. How and in which direction do the vibration move during a earthquake?

6. Define the terms "Epicenter".

7. What do you mean by earthquake preparadness?

8. Define weathering.

9. Define erosion.

10. What is a "volcano"?

OUT CHANGING EARTH

OUT CHANGING EARTH

OUT CHANGING EARTH

Class 7 Social Science Revision Assignments
CBSE Class 7 Social Science Revision Assignment Set A
CBSE Class 7 Social Science Revision Assignment Set B
CBSE Class 7 Social Science Revision Assignment Set C
Our Environment Chapter 02 Inside Our Earth
CBSE Class 7 Social Science Geography Inside Our Earth Assignment
Our Environment Chapter 03 Our Changing Earth
CBSE Class 7 Social Science Geography Our Changing earth Assignment
Our Environment Chapter 04 Air
CBSE Class 7 Social Science Geography Air Assignment
Our Environment Chapter 05 Water
CBSE Class 7 Social Science Geography Water Assignment
Our Environment Chapter 06 Natural Vegetation and Wild Life
CBSE Class 7 Social Science Geography Natural Vegetation And Wild Life Assignment
Our Environment Chapter 07 Human Environment
CBSE Class 7 Social Science Geography Environment Assignment
CBSE Class 7 Social Science Geography Human Environment Assignment
Our Environment Chapter 09 Life in the Deserts
CBSE Class 7 Social Science Life in deserts Assignment
Our Pasts II Chapter 01 Tracing Changes Through a Thousand Years
CBSE Class 7 Social Science History Tracking Changes Through A Thousand Years Assignment
Our Pasts II Chapter 02 New Kings and Kingdoms
CBSE Class 7 Social Science History New Kings and Kingdoms Assignment
Our Pasts II Chapter 03 The Delhi Sultanate
CBSE Class 7 Social Science History The Delhi Sultanate Assignment
Our Pasts II Chapter 04 The Mughal Empire
CBSE Class 7 Social Science History the Mughal Empire Assignment
Our Pasts II Chapter 05 Rulers And Buildings
CBSE Class 7 Social Science History Ruler and Buildings Assignment
Our Pasts II Chapter 06 Towns Traders And Craftspersons
CBSE Class 7 Social Science Tower Traders and Crafts Persons Assignment
Our Pasts II Chapter 07 Tribes, Nomads And Settled Communities
CBSE Class 7 Social Science History Tribes Nomads And Settled Communities Assignment
Our Pasts II Chapter 08 Devotional Paths To The Divine
CBSE Class 7 Social Science History Devotional Paths To The Divine Assignment
Our Pasts II Chapter 09 The Making Of Regional Cultures
CBSE Class 7 Social Science The Flowering Of Regional Cultures Assignment
Our Pasts II Chapter 10 Eighteenth Century Political Formations
CBSE Class 7 Social Science History Eighteenth Century Political Formations Assignment
Social and Political Life-II Chapter 02 Role of the Government in Health
CBSE Class 7 Social Science Role of the State Government Assignment
Social and Political Life-II Chapter 03 How the State Government Works
CBSE Class 7 Social Science State Government Executive Assignment
Social and Political Life-II Chapter 06 Understanding Media
CBSE Class 7 Social Science The Media and democracy Assignment
Social and Political Life-II Chapter 07 Markets Around Us
CBSE Class 7 Social Science Market around Us Assignment
z Assignments for Class 7 Social Science
CBSE Class 7 Social Science Collection of Assignments Set A
CBSE Class 7 Social Science Collection of Assignments Set B
CBSE Class 7 Social Science Collection of Assignments Set C
CBSE Class 7 Social Science Collection of Assignments Set D
CBSE Class 7 Social Science Collection of Assignments Set E
CBSE Class 7 Social Science Collection of Assignments Set F
CBSE Class 7 Social Science Collection of Assignments Set G
CBSE Class 7 Social Science Democracy and Equality Assignment
CBSE Class 7 Social Science Geography Atmosphere Assignment
CBSE Class 7 Social Science Geography Life In The Temperate Grasslands Assignment
CBSE Class 7 Social Science History Historical Monuments Assignment
CBSE Class 7 Social Science How Surface Landforms Change Assignment Set A
CBSE Class 7 Social Science How Surface Landforms Change Assignment Set B
CBSE Class 7 Social Science Institutions of democracy Assignment
CBSE Class 7 Social Science Religious Developments Assignment
CBSE Class 7 Social Science Surface Landforms Change Assignment
CBSE Class 7 Social Science The Medieval Period Assignment
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CBSE Class 7 Social Science Our Environment Chapter 3 Our Changing Earth Assignment

We hope you liked the above assignment for Our Environment Chapter 3 Our Changing Earth which has been designed as per the latest syllabus for Class 7 Social Science released by CBSE. Students of Class 7 should download and practice the above Assignments for Class 7 Social Science regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 7 Social Science practice sheet in Pdf. All questions have been designed for Social Science by looking into the pattern of problems asked in previous year examinations. You can download all Revision notes for Class 7 Social Science also absolutely free of cost. Lot of MCQ questions for Class 7 Social Science have also been given in the worksheets and assignments for regular use. All study material for Class 7 Social Science students have been given on studiestoday. We have also provided lot of Worksheets for Class 7 Social Science which you can use to further make your self stronger in Social Science.

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