Land, Soil, Water, Natural Vegetation, and Wildlife Resource | Chapter 2 | Geography |
Chapter 2 – Land, Soil, Water, Natural Vegetation, and Wildlife Resource
Exercises
Q1. Answer the
following questions:
(i). Which are the two main climatic factors
responsible for soil formation?
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(ii) Write any two reasons for
land degradation today.
Ans. Deforestation and the indiscriminate use of
chemical pesticides and fertilisers in agricultural lands are two factors
contributing to land degradation.
(iii). Why is land considered an
important resource?
Ans. The land is among the most important natural
resources. It provides habitation to a wide variety of flora and fauna. Human
beings use the land for various purposes such as agriculture, forestry, mining,
building houses and roads, and setting up industries.
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(iv). Name two steps that the government has taken to conserve plants and animals?
Ans. Two steps that the government has taken to
conserve plants and animals:
(a) Has set up national parks, wildlife sanctuaries
and biosphere reserves for protecting natural vegetation and wildlife; for
example, the Kaziranga National Park in Assam.
(b) Has banned the killing of lions, tigers, deer,
great Indian bustards, and peacocks. It has also prohibited the trade of the
species of plants and animals protected under the international agreement
CITES.
(v) Suggest three ways to
conserve water.
Ans. Three ways to conserve water:
(a) Rain-water harvesting.
(b) Reducing wastage of water.
(c) Replenishing groundwater by promoting
afforestation.
Q2. Tick the
correct answer:
(i) Which one of the following is NOT a factor of soil formation?
(a) time (b) soil texture (c) organic matter
(ii) Which one of the following methods is
most appropriate to check soil erosion on steep slopes?
(a) shelterbelts (b) mulching (c) terrace cultivation
(iii) 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 of polypacks after shopping
Ans.
(i). Which one of the following is not a factor of
soil formation?
Ans. (b). Soil texture
(ii). Which one of the following methods is most
appropriate to check soil erosion on steep slopes?
Ans. (c) Terrace cultivation
(iii). Which one of the following is not in favour
of the conservation of nature?
Ans. (c) Dispose of polypacks after shopping
Q3. Match the following:
(i) Land use          (a)
prevent soil erosion
(ii) Humus    (b) the narrow zone of contact between the lithosphere, hydrosphere, and atmosphere
(iii) Rock dams     (c)
productive use of land
(iv) Biosphere                (d)
organic matter deposited on topsoil
(e) contour ploughing
Ans.
i. Land use     Productive use of land
ii. Humus       Organic matter deposited on topsoil
iii. Rock dams          Prevent soil erosion
iv. Arable land         Land suitable for agriculture
v. Barrier      Contour ploughing
Q4. State whether
the given statements are true or false. If true, write the reasons.
(i) Ganga–Brahmaputra plain of India is an
overpopulated region.
(ii) Water availability per person in India
is declining.
(iii) Rows of trees planted in the coastal
areas to check the wind movement are called intercropping.
(iv) Human interference and changes in
climate can maintain the ecosystem.
Ans.Â
(i) This statement is true. Plains and river
valleys offer suitable land for agriculture. Hence, these are densely-populated
areas of the world.
(ii). This statement is true. Though water is
present in abundance, freshwater is a scarce resource. Water availability is a
serious problem in many regions of the world. Due to the wastage of water,
deforestation, and the pollution and depletion of freshwater reserves (such as
rivers and groundwater), the availability of water is fast declining.
(iv). This statement is false. The described process
is called shelterbelts.
Intercropping is the process in which different
crops are grown in alternate rows and are sown at different times to protect
the soil from rain wash.
(v). This statement is false. Human interferences
and climatic changes for the most part adversely affect the balance of the
ecosystem.
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