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Exploring Continents – North America and South America Book Back Questions 7th Social Science Lesson 21

7th Social Science Lesson 21

21] Exploring Continents – North America and South America

Book Back Questions with Answer and Do You Know Box Content

Do You Know?

Isthumus: A narrow stretch of land joining two large land masses.

Strait: A narrow stretch of water joining two large water bodies.

The Cordilleras are also part of the Fire Ring of the Pacific because there are a number of active volcanoes and this area is also subject to earthquakes.

Highest peaks in different continents: Asia – Mount Everest (8848 meters) ; South America – Mount Aconcagua (6961 meters) ; North America – Mount McKinley (6194 meters) ; Africa – Mount Kilimanjaro ( 5895 meters) ; Europe – Mount Elbrus (5642 meters) ; Antarctica – Mount Vinson Massif (4892 meters) ; Australia – Mount Kosciuszko (2228 meters) .

The Mississippi river has been given the nickname “The Big Muddy” because it erodes a lot of sand and mud as it rushes down the Mountains. Some of the States of the United States are named after the tributaries of two mighty rivers the Mississippi and Missouri.

Grand Canyon is a steep-sided Canyon carved by the Colorado River in Arizona State of USA.

The Westerlies or Anti-trades are prevailing winds from the west towards the east in the middle latitudes between 30 and 60 degrees’ latitude.

Grand Banks: The Grand Banks is among the world’s largest and richest resource areas, renowned for both their valuable fish stocks and petroleum reserves.

Eskimos live in the very cold and inhospitable region where plenty of fish varieties are available. They were able to dress themselves in thick warm clothes made of fur, they live in igloos. Their lives were very simple and they could not alter the environment to any extent. They specially designed a house by ice and is known as igloos.

Panama Canal: In 1914 a Canal was cut across the Isthmus of Panama for 80 kms long which connects the Atlantic with Pacific Ocean. It greatly reduced the distance between Europe and the West Coast of North and South America.

Together with the Central America, South America is also known as Latin America, having been discovered and colonized mostly by the Latin’s, i.e., The Spanish and the Portuguese.

In equatorial regions convectional rain occurs almost daily in the afternoons. It generally occurs at 4 pm that’s why it is known as 4’0 Clock Rain.

Amazon is the greatest river of South America and the largest drainage system in the world in terms of the volume of its flow and the area of its basin.

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.

South American nations have variety of music. Some of the most famous genres include Samba from Brazil, Tango from Argentina and Uruguay and Cumbia from Colombia.

Choose the best answers:

1. The ___________ separates North America from Asia.

(a) Bering Strait

(b) Palk Strait

(c) Malacca Strait

(d) Gibraltar Straits

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

(a) Mexico

(b) USA

(c) Canada

(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

4. ____________ is the longest mountain chain in the world.

(a) The Andes

(b) The Rockies

(c) The Himalayas

(d) The Alps

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

(a) The Mackenzie

(b) The Orinoco

(c) The Amazon

(d) The Parana

Fill in the blanks:

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

2. _____________ is one of the world’s best fishing grounds.

3. The highest peak in the Andes is _______________ on the Chile – Argentina border.

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

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

Match the following:

1. Mount McKinley – Tropical forests

2. Grand Canyon – The flightless bird

3. Ebony – The Colorado River

4. 4’0 Clock Rains – 6194 m

5. Rhea – The equatorial regions

Consider the following the statements and tick the appropriate answer:

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

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 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

Answers:

Choose the best answers:

1.Bering Strait 2. Cuba 3. The Mississippi and Missouri rivers 4. The Andes 5. The Amazon

Fill in the blanks:

1. Death Valley 2. Grand Bank 3. Mount Aconcagua 4. The Selvas 5. Minas Gerais and Sao Paulo

Match the following:

1. 6194m 2. The Colorado River 3. Tropical forests 4. The Equatorial regions 5. The flightless bird

Consider the following the statements and tick the appropriate answer:

1.Both A and R is correct.

2. A is wrong and R is correct.

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