Thursday , July 7 2022
7th Class CBSE Geography

Human Environment Interactions: Tropical and Subtropical Region

Human Environment Interactions [Page 2]: The Tropical and the Subtropical Region – 7th Class Geography Chapter 08

Question: How does environment play a dominant role in the distribution of population in the Ganga-Brahmaputra basin?

Answer: Ganga-Brahmaputra Basin:

  1. Ganga-Brahmaputra basin has varied topography.
  2. The environment plays a dominant role in the distribution of the population here.
  3. The mountain areas with steep slopes have inhospitable terrain.
    Hence less number of people live in the mountain area of the Ganga-Brahmaputra basin.
  4. The plain area provides the most suitable land for human habitation.
  5. The soil is fertile.
  6. Agriculture is the main occupation of the people.
  7. The density of population is very high.
  8. Since cultivation of paddy requires sufficient water, it is grown in the areas where the amount of rainfall is high or enough water is available.

Human Environment Interactions – Question: Give an account of agriculture in the Ganga-Brahmaputra Basin.

Answer: Agriculture in Ganga-Brahmaputra Basin:

  1. Wheat, Maize, Sorghum, Gram and Millet are major crops that are grown as food crops.
  2. Cash crops like sugarcane and jute are grown in large quantities.
  3. Banana plantation are seen in some areas of the plain.
Terrace Farming
Terrace Farming
  1. In West-Bengal and Assam tea is grown in plantations.
  2. Silk is produced through the cultivation of silk worms in parts of Bihar and Assam.
  3. In the mountains and hills, crops are grown on terraces made on gentle slope.

Question: Explain the forest wealth of Ganga-Brahmaputra Basin.


  1. The vegetation cover is according to the type of landforms.
  2. Delta region is covered with mangrove forests.
  3. In this basin tropical deciduous trees grow along with teak, sal, peepal.
  4. Thick bamboo groves are in Brahmaputra plains.
  5. In parts of Uttarakhand, Sikkim and Arunachal Pradesh and other small states of the North-east coniferous trees like pine, deodar and fir are seen.

Question: Write about the fauna of Ganga-Brahmaputra basin.

Answer: A wide variety of wild life is found here:

  1. Elephants, tigers, deer and monkeys are common.
  2. One homed rhinoceros, Bengal tiger, crocodiles and alligators are found.
  3. Large aquatic life is found in fresh waters like rohu, catla, hilsa.

Question: Why are terraces built on the mountain slopes?

Answer: Terraces are built on the gentle (mountain) slopes to create flat surfaces on which crops are grown. The slope is removed so that water does not ran off rapidly.

Question: Where is blind variety of dolphin found?

Answer: In the fresh water of River Ganga and River Brahmaputra, blind variety of dolphin, locally called Susu, is found.

Question: Why is blind dolphin facing extinction?

Answer: The blind dolphin or Susu is facing extinction at the hand of humans.

  1. The Dolphin eats small fish only. The presence of Susu is an indication of the health of the river.
  2. The untreated industrial and urban wastes with high amounts of chemical are killing this species.

Question: Which towns and cities are located in the Ganga-Brahmaputra Basin?


  1. The Ganga-Brahmaputra Plain has several big towns and cities.
  2. The cities of Allahabad, Kanpur, Varanasi, Lucknow, Patna all with a population of more than ten lakhs are located along the River Ganga.
  3. The waste water from these towns and industries is discharged into the river leading to its pollution.

Question: Write a note on the transportation found in the Ganga-Brahmaputra Basin.


  1. All the four means of transport are well-developed in Ganga-Brahmaputra basin.
  2. In the plain areas the roadways and railways transport the people from one place to another.
  3. The waterways, is an effective means of transport particularly along the rivers. Kolkata is an important port on the river Hooghly.
  4. The plain areas have a large number of airports.

Question: Explain: tourism is an important activity of the Ganga-Brahmaputra basin.

Answer: Tourism is an important activity of the basin.

The following make the basin important from the point of tourism.

  1. Taj Mahal on the banks of River Yamuna in Agra.
  2. Allahabad on the confluence of the River Ganga, Saraswati and Yamuna.
  3. Buddhist centers in Uttar Pradesh and Bihar.
  4. Lucknow with its Imambara.
  5. Assam with Kaziranga and Manas wild life sanctuaries.
  6. Arunachal Pradesh with a distinct tribal culture.

There are so many other places to visit.

Human Environment Interactions – Question: Fill in the blanks with appropriate words:

  1. Women of warrior tribe in Roman empire were called …………….
  2. Small rivers that join a main river are called ……………………
  3. Large houses called …………………… have steep slanting roof.
  4. West Bengal and Assam are known for …………………….. plantations.
  5. People in ………………………… eat queen ants and their eggs.


  1. Amazons
  2. Tributaries
  3. Maloca
  4. Tea
  5. Amazon basin

Question: State whether the given statements are true or false.

  1. Spanish explorers discovered the Amazon river.
  2. It rains only for two months in the Amazon basin.
  3. The flesh eating piranha fish is found in Amazon river.
  4. In the Ganga-Brahmaputra delta area, Bengal tiger, crocodiles and alligators are found.
  5. Agra is on the confluence of river Ganga and Yamuna.


  1. True
  2. False
  3. True
  4. True
  5. False

Question: Answer the following questions briefly:

  1. Name the continent in which the Amazon Basin in located.
  2. What are the crops grown by the people of the Amazon Basin?
  3. Name the birds that you are likely to find in the rain forests of the Amazon.
  4. What are the major cities located on the river Ganga?
  5. Where is the one-homed rhinoceros found?


  1. South America
  2. The people of the Amazon Basin grow tapioca, pine apple and sweet potato. Cash crops such as coffee, maize and cocoa are also grown.
  3. Name the birds that you are likely to find in the rain forests of the Amazon.
  4. The major cities located on the river Ganga are Allahabad, Kanpur, Varanasi, Lucknow, Patna and Kolkata.
  5. The one-homed rhinoceros is found in the Brahmaputra plain.

Question: Tick the correct answer:

  1. Toucans are a type of
    (i) birds (ii) animals (iii) crops
  2. Manioc is the staple food of
    (i) Ganga Basin (ii) Africa (iii) Amazon
  3. Kolkata is located on the river
    (i) Orange (ii) Hooghly (iii) Bhagirathi
  4. Deodars and firs are a type of
    (i) Coniferous trees (ii) Deciduous trees (iii) Shrubs
  5. Bengal tiger is found in
    (i) Mountains (ii) Delta area (iii) Amazon

Answer: (a) – (i), (b) – (iii), (c) – (ii), (d) – (i), (e) – (ii)

Question: Match the following:

(i) Cotton textile

(ii) Maloca

(iii) Piranha

(iv) Silk worm

(v) Kaziranga

(a) Assam

(b) Terrace farming

(c) Sericulture (Silk farming)

(d) Slanting roof

(e) Ganga plain

(f) Varanasi


Answer: (i) – (f), (ii) – (d), (iii) – (g), (iv) – (c), (v) – (a)

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