ncert class 8 geography lesson no. 2 solutions
Answers
Answer:
Answer.1
(i) Temperature and rainfall are two main climatic factors responsible for soil formation. Rainfall contributes in breaking the rocks by applying pressure. Temperature fluctuations between hot and cold also form cracks in the rocks.
(ii) Reasons for land degradation are:
•Ever-growing demand of the growing population
•Destruction of forest‘cover
(iii) Land is an important resource because it provides surface for agriculture, living, forestry, industries, construction, etc. Most activities take place on land.
(iv) Steps taken by the government include establishment of natural parks and wildlife sanctuaries in different parts of India. Their purpose is conservation of vegetation and wildlife, respectively.
(v) Three ways to conserve water are as under:
•Rainwater harvesting: It is a method of collecting water while it rains so that it may come of use in the future.
•The canals used for irrigation should be properly built so that loss of water does not take place while the water is transported to the field.
•In dry regions, drip or trickle irrigation is suggested.
Answer.2
(i) (b), (ii) (c), (iii) (c).
Answer.3
(i) (c), (ii) (d), (iii) (a), (iv) (b).
Answer.4
(i). Ganga–Brahmaputra plain of India is an overpopulated region.
(i). Ganga–Brahmaputra plain of India is an overpopulated region.True: River valley and plains offer suitable land for agriculture. Hence, they are densely populated.
(i). Ganga–Brahmaputra plain of India is an overpopulated region.True: River valley and plains offer suitable land for agriculture. Hence, they are densely populated.(ii) Water availability per person in India is declining.
(i). Ganga–Brahmaputra plain of India is an overpopulated region.True: River valley and plains offer suitable land for agriculture. Hence, they are densely populated.(ii) Water availability per person in India is declining.True: Increasing population, increasing urbanization, the rising standards of living and the rising demands for food and cash crops are leading to shortages in the supply of freshwater. The shortages are either due to drying up of water sources or water pollution.
(i). Ganga–Brahmaputra plain of India is an overpopulated region.True: River valley and plains offer suitable land for agriculture. Hence, they are densely populated.(ii) Water availability per person in India is declining.True: Increasing population, increasing urbanization, the rising standards of living and the rising demands for food and cash crops are leading to shortages in the supply of freshwater. The shortages are either due to drying up of water sources or water pollution.(iii) Rows of trees planted in the coastal areas to check the wind movement are called intercropping.
(i). Ganga–Brahmaputra plain of India is an overpopulated region.True: River valley and plains offer suitable land for agriculture. Hence, they are densely populated.(ii) Water availability per person in India is declining.True: Increasing population, increasing urbanization, the rising standards of living and the rising demands for food and cash crops are leading to shortages in the supply of freshwater. The shortages are either due to drying up of water sources or water pollution.(iii) Rows of trees planted in the coastal areas to check the wind movement are called intercropping.False: Rows of trees are planted to check the wind movement and protect soil cover. These are called as shelterbelts.
(i). Ganga–Brahmaputra plain of India is an overpopulated region.
True: River valley and plains offer suitable land for agriculture. Hence, they are densely populated.
(ii) Water availability per person in India is declining.
True: Increasing population, increasing urbanization, the rising standards of living and the rising demands for food and cash crops are leading to shortages in the supply of freshwater. The shortages are either due to drying up of water sources or water pollution.
(iii) Rows of trees planted in the coastal areas to check the wind movement are called intercropping.
False: Rows of trees are planted to check the wind movement and protect soil cover. These are called as shelterbelts
.(iv). Human interference and changes of climate can maintain the ecosystem.
.False: Climate change and human interferences can cause the loss of natural habitats, and hence destroy the ecosystem.