CBSE Class 7 Geography Our Changing Earth Worksheet Set A

Read and download free pdf of CBSE Class 7 Geography Our Changing Earth 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

Our Changing Earth Class 7 Social Science Worksheet Pdf

Class 7 Social Science students should refer to the following printable worksheet in Pdf for Our Changing Earth 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 Our Changing Earth

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INTERNATIONAL INDIAN SCHOOL,JEDDAH

CH-3: OUR CHANGING EARTH

WORKSHEET

Class: VII

Subject: Geography

TICK THE CORRECT ANSWERS :

Question. Alfred Wegener proposed that millions of years ago , there was a super-Continent called-
1] Africa
2] Pangaea
3] Asia
4] Gondwanaland
Answer : [ 2 ]

Question. Which of the following is an active Volcano -
1] Kilmanjaro
2] Mt.Kea
3] Mt.Vesuvius
4] Cotopaxi
Answer : [ 4 ]

Question. Which of the following is not caused by endogenic forces -
1] Glaciers
2] Landslides
3] Volcanic eruptions
4] Earthquake
Answer : [ 1 ]

Question. The place of origin of an earthquake is called-
1] Vent
2] Zone
3] Focus
4] Epicentre
Answer : [ 3 ]

Question. Which of the following is an extinct volcano –
1] Stromboli
2] Mt. Aconcagua
3] Mt.Vesuvius
4] Mt.Kea
Answer : [ 2 ]

 FILL IN THE BLANKS :

Question. Active Valcanoes are also called………………
Answer : Live volcanoes

Question. The conical……….is formed when the erupted materials collect around the vent .
Answer : mountain

Question. The intensity of the earthquake is maximum near the ……………..
Answer : epicentre

Question. The magnitude of earthquake waves is measured on the …………scale.
Answer : Richter 

Question. The forces which originate from within the earth are called…………forces .
Answer : endogenic

VERY SHORT QUESTION ANSWERS :

Question. What is the theory of Continental Drift ?
Answer : Theory of continental drift suggested, that millions of years ago ,all Landmasses were joined together into a supercontinent , called the Pangaea.

Question. What do you mean by epicentre ?
Answer : The point on the earth’s surface ,which is vertically above the focus. The intensity of an earthquake is maximum near the epicentre.

Question. Define Seismograph ?
Answer : An instrument that detects , measures and records an earthquake Is called seismograph.

Question. What are the three major earthquake zones ?
Answer : The Earth has three major earthquake zones. The first large area kn- own as the Pacific Ring of Fire. The second major earthquake zone is along the mid-Ocean ridges.The third major earthquake zone is the Eurasian-Melanesian Mountain belt .

Question. What are the two types of Earthquake waves ?
Answer : There are two types of earthquake waves , Body Waves- which travel through the interior of the earth . Surface Waves arrive and travel on the earth’s surface starting from the epicentre.

SHORT QUESTION ANSWERS :

Question. Explain the concept of Plate Tectonic ?
Answer : Plate tectonics explains the features and movements of earth sur- face , from deepest ocean trench to the tallest mountain. The earth’s crust consists of lithosphere. There are several major and minor plates, all float independently . The rate of movement of the plates is extrem- ely slow , about a few millimetres per year . Tectonic activities such as earthquakes and volcanicity , occur along the plate margins. The plates are in a constant motion.

Question. What do we understand by Richter scale ?
Answer : The magnitude of an earthquake is measured on the Richter Scale. The Richter Scale ranges from zero to nine. An increase in one point on the Richter scale indicates that the force of the earthquake is 10 time greater than the strength of the previous number. The Richter Scale is used to rate the amount of energy released during an earth- quake.

LONG QUESTION ANSWER :

Question. Describe a Volcano, explain its various parts with the help of diagram?
Answer : A Volcano is a vent or opening in the earth’s crust through which molten material erupts suddenly. Magma and other volcanic materials are chann- eled to the surface where they expelled through a crack or hole. The three main parts of a volcano are the chamber ,vent ,and the crater. Way below the surface of the earth is the crust, where volcanic activity begins . Mag- ma is contained in magma chamber. A space within the earth that holds the hot melted rock. Magma also contains gasses, that start to build up pressure over times. When the pressure becomes extreme,the magma is pushed out of the earth through main vent, somewhat like pipeline. The magma shoots through this pipeline in order to escape the earth. A crater is formed when the volcano literally blows its top ,pushing out anything on the earth’s surface, e.g. the Deccan Plateau in India.

Choose the correct answer:

1. The earth’s crust consists of several large and small plates which carry continents and the ocean floor, known as ________________.

a. Exogenic forces

b. Lithospheric plates

c. Mantle

2. The forces that act in the interior of the earth are called_________________.

a. Endogenic forces

b. Exogenic forces

3. The forces that work on the surface of the earth are called _______________.

a. Endogenic forces

b. Exogenic forces

4. The place in the crust where the movement starts is called the _____________.

a. Focus

b. Epicentre

c. Magma chamber

5. The place on the surface above the focus is called the _______________ .

a. Focus

b. Epicentre

c. Crater

6. When the river enters the plain it twists and turns forming large bends known as _____________ .

a. Ox-bow lake

b. Levees

c. Meanders

7. Crescent shaped lake formed by meandering river is known as ____________.

a. Ox-bow lake

b. Levees

c. Meanders

8. Near the sea the river begins to breakup into a number of streams called_______.

a. Tributaries

b. Distributaries

Fill in the blanks:

9. The Lithospheric plates move because of the movement of ________________ inside the earth.

10. Because of the sudden forces, movements like ____________ and _________ takes place.

11. A ____________ is a vent in the earth’s crust through which molten material erupts suddenly.

 

Please refer to attached file for CBSE Class 7 Geography Worksheets (10) - Our Changing Earth

CBSE Class 7 Civics Power Over Ballot Box Worksheet
CBSE Class 7 Civics The Role Of Government In Health Worksheet
CBSE Class 7 Civics Understanding Media Worksheet
CBSE Class 7 Civics Women Change The World Worksheet
CBSE Class 7 Geography A Shirt In The Market Worksheet
CBSE Class 7 Geography Alauddinkhilji Kingdom Worksheet Set A
CBSE Class 7 Geography Alauddinkhilji Kingdom Worksheet Set B
CBSE Class 7 Geography All Chapters Worksheet Set A
CBSE Class 7 Geography All Chapters Worksheet Set B
CBSE Class 7 Geography Atmospheric Pressure And Wins Worksheet
CBSE Class 7 Geography Civics Geography Worksheet
CBSE Class 7 Geography Democracy Worksheet
CBSE Class 7 Geography Earthquake Worksheet
CBSE Class 7 Geography Equality In Indian Democracy Worksheet Set A
CBSE Class 7 Geography History Geography Worksheet Set A
CBSE Class 7 Geography History Geography Worksheet Set B
CBSE Class 7 Geography How Surface Landforms Change Worksheet
CBSE Class 7 Geography India In The Eighteenth Century Worksheet
CBSE Class 7 Geography Interior Of The Earth Worksheet
CBSE Class 7 Geography Kings And Kingdoms Worksheet Set A
CBSE Class 7 Geography Kings And Kingdoms Worksheet Set B
CBSE Class 7 Geography Kings And Kingdoms Worksheet Set C
CBSE Class 7 Geography Life In Temperate Regions Worksheet
CBSE Class 7 Geography Monumental Architecture Worksheet
CBSE Class 7 Geography Physical And Chemical Change Worksheet
CBSE Class 7 Geography Places In Bhopal Worksheet
CBSE Class 7 Geography Razia Sultan Worksheet
CBSE Class 7 Geography Religious Developments Worksheet
CBSE Class 7 Geography Religious Ideas And Movements Worksheet
CBSE Class 7 Geography Role Played By Gender Worksheet Set A
CBSE Class 7 Geography Role Played By Gender Worksheet Set B
CBSE Class 7 Geography The Earths Structure Worksheet
CBSE Class 7 Geography The Flowering Of Regional Cultures Worksheet
CBSE Class 7 Geography Thousand Years Worksheet Set A
CBSE Class 7 Geography Thousand Years Worksheet Set B
CBSE Class 7 Geography Thousand Years Worksheet Set C
CBSE Class 7 Geography Tughlaq Dynasty Worksheet
CBSE Class 7 Geography Water Fresh And Saline Worksheet Set A
CBSE Class 7 Geography Water Fresh And Saline Worksheet Set B
CBSE Class 7 Geography Water Fresh And Saline Worksheet Set C
CBSE Class 7 Geography Women Caste And Reforms Worksheet
CBSE Class 7 History 18Th Century Political Formation Worksheet
CBSE Class 7 History The Mughal Empire Worksheet
CBSE Class 7 History Towns Traders And Craftspersons Worksheet
CBSE Class 7 History Tracing Changes Worksheet
CBSE Class 7 History Tribes Nomads Settled Communities Worksheet
CBSE Class 7 Social Science Eighteenth Century Political Formation Worksheet
CBSE Class 7 Social Science Geography And Civics Worksheet
CBSE Class 7 Social Science Geography Worksheet
CBSE Class 7 Social Science History Worksheet
CBSE Class 7 Social Science Understanding Advertising Worksheet
CBSE Class 7 Social Science Understanding Media Worksheet
Our Environment Chapter 10 Life in the Deserts
CBSE Class 7 Social Science Life In The Deserts Worksheet
Our Environment Chapter 5 Water
CBSE Class 7 Geography Water Worksheet
Our Environment Chapter 9 Life in the Temperate Grasslands
CBSE Class 7 Social Science Life In The Temperate Grassland Worksheet
Our Pasts – II Chapter 10 Eighteenth Century Political Formations
CBSE Class 7 Geography Eighteenth Century Political Formations Worksheet
Our Pasts – II Chapter 6 Towns Traders and Craftpersons
CBSE Class 7 History Towns Traders And Craft Persons Worksheet
Our Pasts – II Chapter 8 Devotional Paths to the Divine
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Our Pasts – II Chapter 9 The Making of Regional Cultures
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Social and Political Life – II Chapter 4 Growing up as Boys and Girls
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Social and Political Life – II Chapter 8 A Shirt in the Market
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Social and Political Life – II Chapter 9 Struggles for Equality
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