JAC Board Class 7th Social Science Solutions Geography Chapter 8 Human Environment Interactions: The Tropical and the Subtropical Regions
JAC Class 7th Geography Human Environment Interactions: The Tropical and the Subtropical Regions InText Questions and Answers
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Question 1.
Name the countries of the basin through which the equator passes.
Answer:
The countries of the basin through which the equator passes are Ecuador, Colombia and Brazil.
Question 2.
Some TV channels broadcast documentaries on the wildlife of the world. Try to watch some of the films and share your experience with the class.
Answer:
Students need to do it themselves.
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Question 3.
River Brahmaputra is known by different names in different places. Find the other names of the river.
Answer:
Padma in Bangladesh, Siang in Arunachal Pradesh, Tsangpo or Yarlung Zangbo in Tibet.
Question 4.
Collect some handicrafts made from jute, bamboo and silk. Display them in the class. Find out in which area they were made?
Answer:
Jute, bamboo and silk are made in Bihar, West Bengal and Assam.
JAC Class 7th Geography Human Environment Interactions: The Tropical and the Subtropical RegionsTextbook Questions and Answers
Question 1.
Answer the following questions.
(i) Name the continent in which the Amazon Basin is located.
Answer:
The continent in which the Amazon Basin is located is South America.
(ii) What are the crops grown by the people of the Amazon Basin?
Answer:
The crops grown by the people of the Amazon Basin are pineapple, tapioca and sweet potato. Maize, coffee and cocoa are also grown as cash crops.
(iii) Name the birds that you are likely to find in the rainforests of the Amazon.
Answer:
The birds that are likely to found in the rainforests of the Amazon are macaws, humming bird and toucans.
(iv) What are the major cities located on the River Ganga?
Answer:
The major cities located on the River Ganga are Kolkata, Patna, Varanasi, Kanpur and Prayagraj (Allahabad).
(v) Where is the one-horned rhinoceros found?
Answer:
In the Brahmaputra plain, the one-horned rhinoceros is found.
Tick (√) the correct answer.
Question 2.
(i) Toucans are a type of
(a) birds
(b) animals
(c) crops
Answer:
(a) birds
(ii) Manioc is the staple food of
(a) Ganga Basin
(b) Africa
(c) Amazon
Answer:
(c) Amazon
(iii) Kolkata is located on the river
(a) Orange
(b) Hooghly
(c) Bhagirathi
Answer:
(b) Hooghly
(iv) Deodars and firs are a type of
(a) Coniferous trees
(b) Deciduous trees
(c) Shrubs
Answer:
(a) Coniferous trees
(v) Bengal tiger is found in
(a) mountains
(b) delta area
(c) Amazon
Answer:
(b) delta area
Question 3.
Match the following.
| (i) Cotton textile | (a) Assam |
| (ii) Maloca | (b) Terrace farming |
| (iii) Piranha | (c) Sericulture |
| (iv) Silk worm | (d) Slanting roof |
| (v) Kaziranga | (e) Ganga plain |
| (f) Varanasi | |
| (g) Fish |
Answer:
| (i) Cotton textile | (e) Ganga plain |
| (ii) Maloca | (d) Slanting roof |
| (iii) Piranha | (g) Fish |
| (iv) Silkworm | (c) Sericulture |
| (v) Kaziranga | (a) Assam |
Question 4.
Give reasons.
(i) The rainforests are depleting.
Answer:
The rainforests is depleting due to the developmental activities that are going at a fast speed. It is evaluated that a large region of the rainforest has been disappearing yearly in the basin. As a result, the top soils is washed away when the rain falls and the lush green forests turn into barren and empty landscape. Apart from this, setting up large scale industries after the clearing of forests.
(ii) Paddy is grown in the Ganga- Brahmaputra plains.
Answer:
Paddy cultivation needs sufficient water. The Ganga-Brahmaputra plains fulfills this condition hence paddy is grown in the Ganga- Brahmaputra plains.
Question 5.
Map Skills
(i) On an outline map of Indian Sub-continent, draw the rivers Ganga and Brahmaputra from the source to the mouth. Also show the important tributaries of both the rivers.
Answer:
Important tributaries of river Ganga: Yamuna, Gomti, Kosi, Damodar Important tributaries of river Brahmaputra: Teesta, Dibang,
Kolong, Lohit, Subansiri. Do it yourself.
(ii) On the political map of the South America, draw the equator. Mark the countries located on the equator.
Answer:
Do it yourself.
(For Fun)
Question 6.
Make a collage to show places of attractions in India. You can divide the class in different groups to show attractions based on mountain landscapes, coastal beaches, wildlife sanctuaries and places of historical importance.
Answer:
Students need to do it yourself.
Question 7.
Activity
Collect under mentioned material and observe how destruction of trees effect the soil cover.
Material
- Three small flowerpots or food cans (e.g., cold drinks tin cans),
- one big can with holes punched in the bottom (this will act as a sprinkling can),
- twelve coins or bottle caps
- soil.
Process:
Take three small cans or pots. Fill them with soil till the top. Press the soil to make it level with the top of the can. Now put four coins or bottle caps on the soil of each can. Take the big can that has been punched with holes and fill it with water. You can also take the sprinkling can from your garden. Now, sprinkle water on the three cans. On the first can sprinkle water very slowly so that no soil splashes out.
Let moderate amount of water be sprinkled on the second can. On the third can, sprinkle the water heavily. You will observe that unprotected soil splashes out. Where the ‘rain’ is heavy the amount of soil that splashes out is the maximum and least in case of the first can. The coins or caps represent the tree covers. It is clear that if the land is cleared completely of the vegetation, the soil cover will quickly disappear.
Answer:
Students need to do it by themselves under the guidance of teachers parents.
JAC Class 7th Geography Human Environment Interactions: The Tropical and the Subtropical Regions Important Questions and Answers
Multiple Choice Questions
Question 1.
Through Delhi, the largest tributary of the Ganges passes. The city which join the river Ganga is
(a) Kanpur
(b) Patna
(c) Prayagraj
(d) Kolkata
Answer:
(c) Prayagraj
Question 2.
The major cities of India and Bangladesh which flank the Ganga- Brahmaputra delta are
(a) Patna and Dhaka
(b) Kolkata and Dhaka
(c) Patna and Faridpur
(d) Kolkata and Faridpur
Answer:
(b) Kolkata and Dhaka
Question 3.
The Ganges which joins the Brahmaputra in to form one of the largest river basins in the world.
(a) Nepal
(b) India
(c) China
(d) Bangladesh
Answer:
(d) Bangladesh
Question 4.
The most common food eaten by the Amazon people are
(a) Manioc
(b) Plum
(c) Passion fruit
(d) None of these
Answer:
(a) Manioc
Question 5.
The Amazon river basin encompasses the countries of Bolivia, Brazil, Columbia, Ecuador, Guyana, Peru, Suriname, and Venezuela.
river is not a tributary of the Amazon,
(a) Purus
(b) Songa
(c) Rio Negro
(d) Nile
Answer:
(b) Songa
Question 6.
……. is not situated on the banks of the river Ganga.
(a) Indore
(b) Kolkata
(c) Patna
(d) Varanasi
Answer:
(a) Indore
Question 7.
The animal which is not found in the rainforest is
(a) Sloth
(b) Jaguars
(c) Lions
(d) None of these
Answer:
(c) Lions
Question 8.
Climate found in the Amazon Basin is
(a) Hot and wet
(b) Extremely cold
(c) Hot and humid
(d) Extremely hot
Answer:
(a) Hot and wet
Question 9.
Piranha is a type of
(a) Bird
(b) Reptiles
(c) Insect
(d) Fish
Answer:
(d) Fish
Question 10.
Cash crops grown in the Ganga- Brahmaputra plain are
(a) Jute and sugarcane
(b) Sugarcane and maize
(c) Jute and maize
(d) Sugarcane and banana
Answer:
(a) Jute and sugarcane
Very Short Answer Type Questions
Question 1.
What are the cash crops that the rainforest people grow?
Answer:
The cash crops that the rainforest people grow are coffee, maize and cocoa.
Question 2.
What do you mean by bromeliads?
Answer:
The special plants that store water in their leaves are known as bromeliads. Animals such as frogs use these pockets of water for laying their eggs.
Question 3.
Name the crops which are grown in Ganga-Brahmaputra basin.
Answer:
The crops which are grown in Ganga- Brahmaputra basin are paddy, wheat, maize, sorghum, gram and millets. Cash crops like sugarcane and jute are also grown.
Question 4.
On which river, Taj Mahal is located?
Answer:
Taj Mahal is located on the banks of the river Yamuna.
Question 5.
What do you mean by population density?
Answer:
The number of persons that live in one sq. km. of area is known as population density.
Question 6.
What do you mean by ‘Maloca’?
Answer:
‘Maloca’ means large apartment-like houses with a steeply slanting roof.
Question 7.
Who discovered the Amazon River?
Answer:
A Spanish explorer named Francisco de Orellana discovered the Amazon River.
Question 8.
Define the river’s mouth.
Answer:
The river’s mouth is the place where a river flows into another body of water.
Question 9.
Where Ganga and Brahmaputra basin situated?
Answer:
The Ganga and Brahmaputra basin lies in the sub-tropical region that is situated between 10°N to 30°N latitudes.
Question 10.
Define tributaries.
Answer:
Tributaries are the small river that join the main river.
Short Answer Type Questions
Question 1.
Why the tropical region is called the equatorial region?
Answer:
The tropical region is called the equatorial region because this region lies very close to the equator between 10 degree north and 10 degree south.
Question 2.
Variety of fishes are found in the Amazon basin and Ganga- Brahmaputra basin. What are they?
Answer:
Variety of fishes are found, in the Amazon basin and Ganga-Brahmaputra basin. They are: Amazon Basin: Several species of fishes such as Pancake stingray, Electric eel, Blue shark, Armored catfish, flesh eating Piranha are found. Ganga-Brahmaputra Basin: The popular fishes are rohu, catla and hilsa. It is also the staple diet of the people residing there.
Question 3.
What are the main characteristics of Ganga-Brahmaputra basin?
Answer:
The Ganga and the Brahmaputra plains, the mountains and the foothills of the Himalayas and the Sundarbans delta are the main characteristics of the Ganga and the Brahmaputra basin.
Question 4.
In the Amazon Basin what type of natural vegetation is found?
Answer:
In the Amazon Basin region, it rains heavily and thick forests grow. The forests are so thick that the dense ‘roof’ created by leaves and branches does not allow the sunlight to reach the ground. Hence, the ground remains dark and damp. Only shade tolerant vegetation may grow here. Plant parasites grow such as orchids, bromeliads, etc.
Question 5.
What do people of the Amazon rainforest do?
Answer:
After clearing some trees in the forest, people grow most of their food in small regions. Men hunt and fish along the rivers and women take care of the crops. They mainly grow tapioca, pineapple and sweet potato. Due to uncertainty of hunting and fishing, so the women keep their families alive by feeding them the vegetables they grow. They practice ‘slash and bum agriculture’.
Question 6.
The life of the people of the Amazon basin is changing. How?
Answer:
Time is moving very fast and this has resulted in the change of the life style of the people everywhere around the world. The life of the people of the Amazon basin is also changing but not at a very fast speed. In the early days, it was difficult to reach the core of the forest. The Trans Amazon highway was made in 1970 where all parts of the rain forest accessible. Aircrafts and helicopters are also used for reaching various places and dense forests. The native people was pushed out from the area and forced to settle in new regions and places.
Question 7.
Explain the vegetation found in the Ganga-Brahtnaputra Basin.
Answer:
The vegetation of the Ganga- Brahmaputra Basin covers the area which varies according to the type of landforms. In the Ganga and Brahmaputra, plain tropical deciduous trees grow such as teak, sal and peepal. In the Brahmaputra plain, thick bamboo groves are very common. The delta region is covered with the mangrove forests. In some parts of Uttarakhand, Sikkim and Arunachal Pradesh, coniferous trees like pine, deodar and fir can be found due to the climatic condition which is cool and the slopes are steep.
Question 8.
Explain in short the agricultural activities of the people in the Ganga- Brahmaputra Basin.
Answer:
The main occupation of the people in the Ganga-Brahmaputra Basin is agriculture. The main crop cultivated is paddy. Apart from paddy the other crops which are grown are wheat, maize, sorghum, gram and millets. Cash crops such as sugarcane and jute are also grown. Banana plantations are found in some regions of the plain. In West Bengal and Assam, tea is grown in plantations. Silk is produced through the cultivation of silk worms in some parts of Bihar and Assam. In the mountains and hills, crops are grown on terraces where the slopes are gentle.
Question 9.
What is the indication and implication of devastation of rainforests?
Answer:
The indication of devastation of rainforests is that the top soil is washed away as the rain falls and the lush green forests turn into a barren and unproductive land.
Question 10.
Tourism is an important activity in the Ganga-Brahmaputra basin. How can we say that?
Answer:
Tourism is an important activity of the Ganga-Brahmaputra basin. Taj Mahal on the banks of River Yamuna in Agra, Prayagraj on the confluence of the Rivers Ganga and Yamuna and invisible Saraswati river, Buddhists stupas in Uttar Pradesh and Bihar, Lucknow have its Imambara, Assam with Kaziranga and Manas wildlife sanctuaries and Arunachal Pradesh with a distinct tribal culture are few places worth a visit and to enjoy life.
Long Answer Type Questions
Question 1.
Discuss in brief the wildlife living in the Ganga-Brahmaputra region or plain.
Answer:
There is a diversity and variety of wildlife found in the Ganga- Brahmaputra basin. The common animals which are found are elephants, monkeys, tigers, deers. Also, one- homed rhinoceros are found in the plain. In the delta region, crocodiles, alligators and Bengal tigers are found. Aquatic life flourish in the fresh river water, the lakes and the Bay of Bengal sea. The common and popular fish which are found are hilsa mainly in the fresh water of the river Ganga, rohu and catla and other fresh water fishes.