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Social StudiesClass 8CBSE

Why are human resources important?

Answer: Humans as a resource are important because they have the ability to extract value from all other resources. They can make the best use of nature to create more resources, as they have the knowledge, skill and technology to do so. Education and health help in making humans a valuable resource.

Social StudiesClass 8CBSE

State whether the given statement is true or false. If true, give the reasons.

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 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.

Social StudiesClass 8CBSE

Match the following. Column A Column B Land use prevent soil erosion Humus narrow zone of contact between the lithosphere, hydrosphere and atmosphere Rock Dams productive use of land Biosphere organic matter deposited on top soil contour ploughing

Column A Column B Land use productive use of land Humus organic matter deposited on top soil Rock Dams prevent soil erosion Biosphere narrow zone of contact between the lithosphere, hydrosphere and atmosphere

Social StudiesClass 8CBSE

Which one of the following methods is most appropriate to check soil erosion on steep slopes? (a) Shelterbelts (b) Mulching (c) Terrace cultivation

Answer: c) Terrace cultivation

Social StudiesClass 8CBSE

Which one of the following is NOT in favour of the conservation of nature? (a) switch off the bulb when not in use (b) close the tap immediately after using (c) dispose poly packs after shopping

Answer: c) Dispose poly packs after shopping

Social StudiesClass 8CBSE

Which one of the following is NOT a factor of soil formation? (a) Time (b) Soil texture (c) Organic matter

Answer: b. Soil Texture

Social StudiesClass 8CBSE

Suggest three ways to conserve water.

Answer: Three main ways to conserve water are: Increasing forest cover and other vegetation to slow the surface runoff Replenishing underground water through rainwater harvesting Reducing the loss of water in irrigation and shifting to less water-intensive methods of agriculture

Social StudiesClass 8CBSE

Name any two steps that the government has taken to conserve plants and animals.

Answer: Two major steps taken by the government to protect and conserve plants, animals and natural vegetation are as follows: National parks, wildlife sanctuaries, biosphere reserves are made to protect our natural vegetation and wildlife. Awareness programmes like social forestry and tree plantation- ‘Vanamahotsava’ are organised to conserve forests, which are a valuable natural resource.

Social StudiesClass 8CBSE

Why is land considered an important resource?

nswer: Land is considered an important resource because it can be put to use for various purposes like agriculture, forestry, mining, building houses, roads and setting up of industries.

Social StudiesClass 8CBSE

Write any two reasons for land degradation today.

Answer: The overuse of chemical fertilizers and deforestation are the two main reasons for land degradation. The growing population and their ever-growing demand has led to large scale destruction of forest cover and arable land and has created a fear of losing this natural resource.

Social StudiesClass 8CBSE

Which are the two main climatic factors responsible for soil formation?

Answer: Two main climatic factors responsible for soil formation are temperature and rainfall, in which rainfall influences the rate of weathering and humus formation.

Social StudiesClass 8CBSE

(vi) Co-operatives: ______________________ and _____________

Answer: Mother Dairy and Anand Milk Union Limited (Amul)

Social StudiesClass 8CBSE

(v) Cottage Industries: ___________ and ________________

Answer: pottery and basket weaving

Social StudiesClass 8CBSE

(iv) Agro-based Industries: ____________ and ____________

Answer: Dairy and Sugar

Social StudiesClass 8CBSE

(iii) Tertiary Activities: ________________ and __________

Answer: Transport and banking

Social StudiesClass 8CBSE

(ii) End products: _______________ and _________________________

Answer: Steel and Cloth

Social StudiesClass 8CBSE

(i) Raw Materials: _____________ and _____________________

Answer: Iron ore and Cotton

Social StudiesClass 8CBSE

Public sector and joint sector industry

Answer: Industries owned and operated by the government are public sector industries. Steel Authority of India Limited and Hindustan Aeronautics Limited are examples of Public sector industries. On the other hand, joint sector industries are owned and operated by the state and individuals or a group of individuals. Maruti Udyog Limited is an example of joint sector industry.

Social StudiesClass 8CBSE

Distinguish between the following. (i) Agro-based and mineral-based industry

Answer: Agro-based industries use plant and animal-based products as their raw materials. It is a source of employment for people in rural areas. Food processing, vegetable oil, cotton textile, dairy products and leather industries are examples of agro-based industries, whereas mineral-based industries are primary industries that use mineral ores as their raw materials. It is a source of employment for both rural and urban populations. Steel and Iron Industries and Heavy Machinery industries are examples of mineral-based industries.

Social StudiesClass 8CBSE

ii) Which one of the following is a natural fiber? (a) nylon (b) jute (c) acrylic

Answer: (b) Jute

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