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Chapter: 7th Social Science : Geography : Term 3 Unit 1 : Exploring Continents -North America and South America

Exercises Questions with Answers

7th Social Science : Geography : Term 3 Unit 1 : Exploring Continents -North America and South America : Text Book Back Exercises Questions with Answers, Solution



I. Choose the correct answer


1. The ----------------- separates North America from Asia

a. Bering Strait  

b. Palk Strait

c. Malacca Strait

d. Gibraltar straits

[Answer : (a) Bering Strait]


2. ------------- is known as the “sugar bowl of the world”

a. Mexico

b. USA

c. Canada

d. Cuba

[Answer: (d) Cuba]


3. ----------------- are the longest rivers in North America

a. The Mississippi and Missouri rivers

b. The Mackenzieriver

c. The St. Lawrence river

d. The Colorado river

[Answer : (a) The Mississippi and Missouri rivers]


4. -------------- is the longest mountain chainin the world.

a. The Andes

b.  The Rockies

c. The Himalayas

d. The Alps

[Answer : (a) The Andes]


5. ---------------- basin gets rainfall every day because of its equatorial location

a. The Mackenzie

b. The Orinoco

c. The Amazon

d. The Paraná

[Answer: (c) The Amazon]


II. Fill in the blanks


1. Death valley is 86m below the sea level is the lowest part of the continent of North America.

2. Grand Bank is one of the world's best fishing grounds.

3. The highest peak in the Andes is Mt Aconcagua on the Chile - Argentina border.

4. The Selvas of the equatorial regions are called the “lungs of the world”.

5. Brazil is also known as the “coffee pot” of the world.


III. Match the following


1. Mount McKinley – Tropical forests

2. Grand Canyon – The flightless bird

3. Ebony – The ColoradoRiver

4. 4’o Clock Rains – 6194 m

5. Rhea – The equatorial regions


1. Mount McKinley - 6194 m

2. Grand Canyon     - The Colorado River

3. Ebony                   - The equatorial regions

4. 4’o Clock Rains    - Tropical forests

5. Rhea                      - The flightless bird


IV. Give Reasons


1. The eastern coast of North America particularly USA enjoys mild climate.

Answer: The South and east is usually warm all the year round and the regions around the mouth of the Mississippi-Missouri and the Gulf Coast have summer rain from the North East Trades which blow on-shore in summer.

2. United States of America is known as “Melting Pot”.

Answer:  United States of America is known as “Melting Pot” where hundreds of different cultures meet, blend and creating a new culture.

3. Though Quito and Amazon basin are in the same latitude Quito enjoys eternal Spring. Whereas Amazon basin is hot.


(i) The climate of the continent of South America has been closely influenced by the latitudes, attitudes and the proximity of the Pacific and Atlantic Oceans.

(ii) It is hot in the Amazon basin as the equator passes through it whereas Quito, situated almost on the same latitude on the Andes, has “Eternal Spring”.

(iii) That is, it has a pleasant climate throughout the year because of its high attitude at 9,350 feet or 2849.88 meter above the sea level.

4. Peru is one of the world’s largest producers of tropical fish.


(i) Peru is one of the worlds largest producers of tropical fish. Here the cool Humboldt Current helps in bring plankton, which is the main food for fishes.

(ii) Commercial deep sea fishing off of Peru’s coastal belt of over 3000 km.

(iii) Peruvian waters normally abound with sword fish, mackerel, yellow fin, pompano and shark.

(iv) More than 50 species are caught commercially.

(v) There are over 40 fishing ports on the Peruvian coast.

(vi) Paita and Callao are being the most important centers in Peru.


V. Distinguish between


1. The Rocky mountain and the Appalachian mountain.


Rocky mountain

1. The western part of North America is occupied by long ranges of young fold mountains known as Rocky mountains.

2. The width varies from 110 to 480 kms.

3. The Rocky mountains are west of the Mississippi River.

Appalachian mountain

1. The eastern part of North America is formed of old fold Appalachian which are not continuous like Rockies.

2. There are few peaks more than 1800m high.

3. The Appalachian Mountains are east of the river.

2. The Prairies and the Pampas grassland.

 Prairies grassland

1. The temperate grasslands of North America are known as Prairies.

2. Region - Central USA and Central Canada.

3. Winter is very cold, Summer is hot and rainfall is moderate.

4. Flora - Grasses

5. Fauna - Coyote, Gophers, Rabbits Prairie Dogs and Bison.

Pampas grassland

1. The temperate grasslands of South America are known as Pampas.

2. Region - North of Eastern part of Argentina, Uruguay and Southern most Brazil.

3. Summer is quite warm and winter is cold and moderate rainfall.

4. Flora - short grass.

5. Fauna - Rhea, Pampas Deer, Jaguar, Camel, Stag etc.

3. Tundra and Taiga.



1. Region - Northern coast of Canada and Northern Islands.

2. Climate - Winter is long and severely cold, Summer is short and cool. Rainfall is scanty.

3. Flora - Mosses, Lichens and Dwarf willows.

4. Fauna - Arctic fox, Reindeer, Musk ox, Polar bears, Sable and Blue fox.


1. Region - The coniferous forests are found in Alaska and North Eastern Canada.

2. Climate - Winter is very cold, Summer is warm and short. Heavy snowfall in winter.

3. Flora - Pine, Fir, Cedar and Spruce.

4. Fauna - Beaver, Fox, Sable, Ermine, Skunk, Caribou and Grizzly Bears.


VI. Put (√) for the correct option


1. Assertion (A): Cotton grows well in southern and western states of North America.

Reason (R): Warm summer with frequent rainfall and fertile soil which provide favourable condition.

a. Both A and R is correct.

b. A is correct and R is wrong.

c. A is wrong and R is correct.

d. Both A and R is wrong

[Answer : (a) Both A and R is correct]


2. Assertion (A): Industries in the South America has developed rapidly.

Reason (R): The continent lacks infrastructure (especially transport) need for industrialization.

a. Both A and R are correct.

b. A is correct and R is wrong.

c. A is wrong and R is correct.

d. Both A and R are wrong

[Answer : (c) A is wrong and R is correct]


VII. Answer the following


1. Name the boundaries of North America.


(i) North America is surrounded by the Pacific Ocean in the West, the Atlantic Ocean in the east, Arctic Ocean in the north and South America in the south.

(ii) The North America is joined with the South America by the Isthmus of Panama.

(iii) The Bering Strait separates North America from Asia.

2. Write a note on Mackenzie River.

Answer: The Mackenzie River is the second largest drainage basin of North America. It has it source from Great Slave Lake and drains into Arctic Ocean.

3. What type of fruits are cultivated in North America? Name some of them.


(i) Mainly Citrus Fruits are cultivated in Texas, California, Great Lakes regions and St. Lawrence Valley.

(ii) The important Fruits of North America are Cranberries, Blueberries, Concord Grapes, Strawberries, Gooseberries and the other fruits.

4. Give a short note about the lifestyle of an Eskimos.


(i) Eskimos live in the very cold and inhospitable region where plenty of fish varieties are available.

(ii) They were able to dress themselves in thick warm clothes made of fur, they live in igloos.

(iii) Their lives were very simple and they could not alter the environment to any extent.

(iv) They specially designed a house by ice and is known as igloos.

5. Which are the densely populated areas of North America?


Densely populated areas: Eastern part of North America, Great Lakes region, Florida, California, Mexico and Central America are the mostly densely populated areas.

6. Name the physiographic divisions of South America.


On the basis of topographical features, the continent may be divided into the following physiographic divisions:

(i) The Andes Mountains

(ii) The River Basin or Central Plains

(iii) The Eastern Highlands

7. What is called “4’o clock rains”?


In equatorial regions convectional rain occurs almost daily in the afternoons. It generally occurs at 4pm that’s why it is known as 4’ o Clock Rain.

8. Name the flora and fauna of equatorial forest in South America.


(i) Flora: Rubber, Mahogany, Ebony, Logwood, Brazil nuts and Ceiba.

(ii) Fauna: Anaconda, Armadillo, Piranha, Monkey, Snake, Crocodile and Parrots.

9. What is known as “Estancias”?


The Breeds raised on large pasture lands is known as Estancias. These are divided into several paddocks. Besides this, there are small yards known as corrals where animals are sorted and branded. The owner is the Estanciera who has a number of gauchos.

10. Name the major export of South America.


South Americas major exports are mostly primary commodities such as sugar, coffee, cocoa, tobacco, beef, corn, wheat, petroleum, natural gas, linseed, cotton, iron ore, tin and copper. South Americas products include mostly exported to North America and Europe.


VIII. Answer the following in a paragraph


1. Give an account of the climate of North America.      


(i) The vast latitudinal extent from the Tropics to the Polar Regions makes the climate of North America as varied as that of Asia.

(ii) Unlike the Himalayas, the Rockies run north to south which do not form climatic barrier and do not prevent the icy winds from the Arctic region and penetrating the central plains which therefore have a very long cold winter and very short hot summer.

(iii) Precipitation occurs due to cyclonic storms.

(iv) The Arctic region is cold and mostly dry and has a very short summers and a very long bitterly cold winter.

(v) As one proceeds southwards the short summers become warm but the winters are very cold.

(vi) The central plains have extreme climate from freezing conditions in winter to tropical heat in summer.

(vii) The South is usually warm all the year round and the regions around the mouth of the Mississippi-Missouri and the Gulf Coast have summer rain from the North East Trades which blow on-shore in summer.

(viii) The warm moist South Westerlies not only bring rainfall to the North West coast and also keep it warm.

(ix) The warm Alaskan Current keeps the North.West coast ice free.

(x) The State of California in USA has a Mediterranean Climate with moist winter and dry summers.

2. Describe the Heavy Engineering Industries in North America.

Answer: Heavy Engineering Industries:

(i) Industries which require heavy and bulky raw materials using enormous amounts of power, involvement of huge investment and large transport costs are called heavy industries.

(ii) These industries depend heavily on the Iron and Steel industry.

(iii) The important Heavy Industries are automobile industries, aircraft industries, ship building industries, Railway Wagon industries and farm equipment industries.

(iv) USA is the largest producer of automobiles.

(v) The important Centers of heavy engineering industries are Detroit, Chicago, Buffalo, Indianapolis, Los Angeles, Saint Louis, Philadelphia, New York, Baltimore, and Atlanta in USA and Windsor in Canada.

3. Describe the drainage system in South America.

Answer: (i) Owing to the position of the Andes all the great rivers of the continent drain into the Atlantic.

(ii) The Pacific streams are short and swift but along the coastlands of Peru their waters are used for irrigation and to some extent for hydro-electric power. Amazon is the longest river of South America (6,450km) and is the largest river system in the world.

(iii) This river has over a thousand of tributaries.

(iv) The rivers Rio Negro, Madeira and Tapajos are important tributaries.

(v) At the point where it enters the sea the river is so wide and powerful that it flows even at a distance of 80 km into the high seas.

(vi) The Orinoco River originates in the Guiana Highlands and flows northwards into the Caribbean Sea.

(vii) The river Paraguay has the Parana and Uruguay rivers as the main tributaries which together form and known as the Platte River system.

(viii) All the rivers are navigable for quite some distance in the interior.

4. Write briefly about the major races in South America.


 (i) South America contains the world’s most mixed population.

(ii) Many people in South America are descended from European, especially the Spanish and Portuguese, who begin to arrive during the 15th century.

(iii) The descendants of African slaves brought over by the Europeans. Native people still live in the mountain and the rainforests and keeping their own languages and traditions.

(iv) There are three major races found in South America and are (i) American Indian, (ii) European and (iii) Blacks. The mixed population of Native Indians and Europeans is known as ‘Mestizo’.

(v) The mixed population of European and the Blacks is called ‘Mulato’ and the mixture of Native Indians and Blacks is called ‘Zambo’.

(vi) The current population of South America is 429, 115, 060 (42.25 cores). Population density of South America is 21 persons per square kilometer.

(vii) South America is positioned 5th rank in total population among the continents.


IX. Map skill


1. With the help of the map given in the text and an atlas, name the seas and bays in North America.

2. Mark the rivers Amazon, Orinoco, Negro, Paraguay, Uruguay on a map of South America.


X. Activity


1. Given below are some important cities with industries placed in brackets. Pick out the correct answer from them.

a. Pittsburgh (Textile, Iron and steel, Shipping) [Answer : Iron and steel]

b. Chicago (Meat Packing, Woolen textile, Heavy Engineering) [Answer : Meat Packing]

c. Ontario (Automobile, Paper, Cement) [Answer : Paper]

d. Chile (Oil refinery, Sugar, Cotton textile) [Answer : Oil refinery]

e. Uruguay (Leather processing, Copper smelting, Daily products) [Answer : Dairy products]

2. Write down the answers to the question given in blocks:

a. Name the highest peak in South America.


b. An active volcano in South America.


c. The combined Parana and Paraguay rives.


d. The highest falls in the world.


e. The largest river in the world.


3. Collect pictures of the animals and birds of North America and South America and make a scrap book.


Tags : Exploring Continents -North America and South America | Term 3 Unit 1 | Geography | 7th Social Science , 7th Social Science : Geography : Term 3 Unit 1 : Exploring Continents -North America and South America
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