Longman Panorma Geography Solutions Solutions for Class 7 Social science Chapter 12 Life In Tropical And Sub Tropical Regions are provided here with simple step-by-step explanations. These solutions for Life In Tropical And Sub Tropical Regions are extremely popular among class 7 students for Social science Life In Tropical And Sub Tropical Regions Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Longman Panorma Geography Solutions Book of class 7 Social science Chapter 12 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Longman Panorma Geography Solutions Solutions. All Longman Panorma Geography Solutions Solutions for class 7 Social science are prepared by experts and are 100% accurate.

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Question A.1:

Where is the Amazon River basin located?

Answer:

The Amazon basin lies in South America between the Guiana Highlands to the north and the Brazilian Highlands to the south. The Amazon basin covers nearly 7 million square kilometres of area and nearly half of Brazil, with parts of Bolivia, Peru, Ecuador, Columbia and Venezuela.

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Question A.2:

What type of climate does the Amazon Basin have?

Answer:

The Amazon basin lies in the equatorial region. It has a hot and wet climate throughout the year. There are no seasons and temperatures are uniformly high, averaging between 25 and 30 degree Celsius. There is high humidity and rainfall throughout the year.

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Question A.3:

What is shifting agriculture?

Answer:

Shifting agriculture, or slash and burn agriculture, is commonly practised in the Amazon basin. In this type of agriculture, first of all, a patch of forest land is cleared by felling the trees. Then, the trees are burnt and crops are planted among the stumps. After a few years, the soil loses its fertility and the people abandon the clearing and make a new one in some other part of the forest.

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Question A.4:

Name the two headstreams of the Ganga river?

Answer:

The Ganga river is formed by the joining of two headstreams, that is, the Bhagirathi river , which rises from the Gangotri glacier in the Himalayas, and the Alaknanda river. These two rivers meet at Devprayag and take the name Ganga.

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Question A.5:

Which type of industries have developed in the Ganga-Brahmaputra basin?

Answer:

A number of agro-based industries have developed in the Ganga-Brahmaputra basin. Cotton, silk and jute textiles and sugar and food processing industries are important in the Ganga plains. The Brahmaputra basin is known for its tea industry. Apart from these, many small-scale and cottage industries have also developed in the rural areas of the basin.

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Question A.6:

Name some important towns in the Ganga-Brahmaputra basin?

Answer:

The Ganga-Brahmaputra basin is very densely populated and has a large number of urban settlements. The region has numerous cities and towns, ranging from administrative capitals like Delhi, Patna and Lucknow and industrial cities like Kanpur and Agra to religious centres like Haridwar and Varanasi.

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Question B.1:

Climate of the Amazon basin and the Ganga-Brahmaputra basin.

Answer:

Climate of Amazon Basin Climate of Ganga-Brahmaputra Basin
 
No distinct seasons; hot throughout the year  Pronounced hot and cold seasons
 
Rainfall throughout the year Distinct dry periods; rainfall occurs for few months
 

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Question B.2:

Human activities of the Amazon basin and the Ganga-Brahmaputra basin

Answer:

Human Activities in Amazon Basin Human Activities in Ganga-Brahmaputra Basin
 
Extremely sparse population Very dense population
Inhabitants practise primitive and shifting agriculture Inhabitants practise sedentary agriculture with modern farming techniques
Very little industrial development Development of agro-based industries

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Question C.1:

The interiors of the selvas are always dark and damp.

Answer:

The evergreen forests of Amazon basin, known as the selvas, are composed of tall hardwood trees with broad leaves that form a canopy at the top. This prevents the sunlight from penetrating into the forests. Hence, the interior of these forests is always dark and damp.

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Question C.2:

The Amazon basin has extremely sparse population.

Answer:

The Amazon basin has extremely sparse population. This is because of the following reasons:

  • Oppressive climate
  • Dense forests
  • Lack of transport facilities
  • Frequent outbreak of diseases like malaria and yellow fever

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Question C.3:

Floods frequently occur in the Ganga-Brahmaputra basin.

Answer:

The rivers of the Ganga-Brahmaputra basin are prone to floods. This is because of the following reasons:

  • Huge amount of water
  • Flat topography
  • Heavy rainfall
  • Siltation

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Question C.4:

The Ganga-Brahmaputra basin is densely populated.

Answer:

Ganga-Brahmaputra basin has very high population. This is because of following reasons:

  • Fertile alluvial soil
  • Availability of water from the rivers
  • Moderate climate

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Question D.1:

Describe the forests of the Amazon basin.

Answer:

The Amazon basin lies in the equatorial region, owing to which it has a hot and wet climate throughout the year. The high temperature and heavy rainfall give rise to dense and luxuriant vegetation in the Amazon basin. The evergreen tropical rainforests of this area are the largest of their kind and are known as selvas. The trees are tall with hard wood and broad leaves that form a canopy at the top. This prevents sunlight from entering the forests and the interiors are dark and damp. Mosses and ferns are found growing on the ground. Climbers like liana are found along the tall tree trunks.
The important trees of the Amazon basin are ebony, mahogany, rosewood, rubber and cinchona. These trees provide us with a variety of useful products like timber, wax, resins, fibres, rubber and nuts.

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Question D.2:

Give an account of the wildlife of the Amazon basin.

Answer:

The dense forests, rivers and swamps of the Amazon basin are very rich in different species of wildlife. A variety of monkeys and sloths are found on the trees. Pumas and jaguars are the animals of prey. Tapits, armadillos and anteaters are found on the ground. Reptiles like crocodiles, turtles, iguanas as well as different kinds of snakes, including the anaconda, are found in the rivers. A rich variety of fishes are found in the rivers. Apart from these, colourful birds like toucans, hummingbirds, different types of parrots and a variety of insects are also found in the Amazon basin.  

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Question D.3:

Write about the agricultural development in the Ganga-Brahmaputra basin.

Answer:

Agriculture is the main occupation of the people of the Ganga-Brahmaputra basin. Due to the fertile alluvial soil of the plains, the availability of water for irrigation from the river systems and the moderate temperature regime, the farmers are able to grow a variety of crops, both food and cash, throughout the year. Modern farming techniques have replaced the traditional methods even though the land holdings  are quite small in size due to the high population density in the region.

Wheat, cotton and sugarcane are the chief crops on the western side of the Ganga plain, while on the eastern side, rice, jute and sugarcane are important. In the Brahmaputra basin, rice, jute and tea are the important crops. Pulses, oilseeds, fruits and vegetables are also grown throughout the region.

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Question E.1:

Which of the following countries does not lie within the Amazon basin?

a. Peru
b. Argentina
c. Venezuela
d. Colombia

Answer:

The correct answer is option (b).

Explanation: ​The Amazon basin lies in Brazil, Bolivia, Ecuador, Peru, Columbia and Venezuela.

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Question E.2:

The Carnauba palm tree yields

a. wax
b. rubber
c. nuts
d. fibre

Answer:

 The correct answer is option (​a).

Explanation: The Carnauba palm tree yields wax, which is used to make shoe polish, varnishes and candles.

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Question E.3:

Which of the following rivers is not a tributary of the Ganga?

Answer:

The correct answer is option (​c) Tista.

Explanation: ​The river Tista is a tributary of Brahmaputra and not Ganga. 

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Question E.4:

A tree that is commonly found in mangrove forests is

a. ebony
b. mahogany
c. teak
d. sundari

Answer:

The correct answer is option (​d).

Explanation: ​Sundari trees are quite extensively found in the mangrove forests of India. It is owing to the presence of these trees that the largest delta of the world is named the Sunderbans.

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Question F:

The first alphabet of the answer of each of the questions mentioned below will give you the name of the largest river basin:

1. The largest snake
2. A large riverine port in Brazil
3. A mountain range in South America
4. A striped animal
5. An animal Assam is famous for
6. The Ganga plain is in this part of India

Answer:

1. The largest snake is Anaconda.
2. A large riverine port in Brazil is Manaus.
3. A mountain range in South America is Andes.
4. A striped animal is Zebra.
5. The animal for which Assam is famous for is one-horned rhinoceros.
6. The Ganga plain is in the North part of India.

The name obtained on combining the first letters of the answers of each of the questions is AMAZON, which is the largest river basin in the world.

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Question G:

1. On an outline map of South America, mark and label the Andes Mountains, Guiana Highlands, Brazilian Highlands, River Amazon, Manaus and Belem

2. On an outline map of India, mark and label the Himalayan mountains, River Ganga, River Brahmaputra, Sunderbans, Haridwar, Patna, Kolkata and Dispur

Answer:










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