Soil, Water, Natural Vegetation and Wildlife Resources
Q37. Why land is considered an important resource?
Land is considered an important resource because it is used for different
purposes such as agriculture, forestry, mining, building houses, roads and
setting up of industries.
Q38. Which areas are sparsely populated or uninhabited?
rugged topography, steep slopes of the mountains, low-lying areas susceptible
to water logging, desert areas, and thick forested areas are normally sparsely
populated or uninhabited.
Q39. How much land on Earth is inhabited?
Ans. Ninety per cent of the world population occupies
only thirty per cent of land area. The remaining seventy per cent of the land
is either sparsely populated or uninhabited.
Q40. What are the major threats to the environment due to over
exploitation of land resources?
Ans. Land degradation, landslides, soil erosion,
desertification are the major threats to the environment because of the
expansion of agriculture and constructional activities.
Q41. What are the reasons for water shortage?
Ans. Water shortage may be a consequence of variation
in seasonal or annual precipitation or the scarcity is caused by
overexploitation and contamination of water sources.
Q42. What is the major cause of water pollution?
of untreated or partially treated sewage, agricultural chemicals and industrial
effluents in water bodies are major contaminants. They pollute water with
nitrates, metals and pesticides.
Q43. What is ‘water cycle’?
Ans. Water is in constant motion, cycling through the
oceans, the air, the land and back again, through the processes of evaporation,
precipitation and run-off. This is referred to as the ‘water cycle’.
Q44. What are the major factors affecting soil formation?
major factors of soil formation are the nature of the parent rock and climatic
factors. Other factors are the topography, role of organic material and time
taken for the composition of soil formation.
Q45. What are the uses of water resources?
Ans. Humans use huge amounts of water not only for drinking
and washing but also in the process of production. Water for agriculture,
industries, generating electricity through reservoirs of dams are the other usages.
Q46. What do you mean by private land and community land?
Ans. Private land is owned by individuals whereas,
community land is owned by the community for common uses like collection of
fodder, fruits, nuts or medicinal herbs. These community lands are also called
common property resources.
Q47. Which countries in the world are facing water shortage?
is scarcity of water in many regions of the world. Most of Africa, West Asia,
South Asia, parts of western USA, north-west Mexico, parts of South America and
entire Australia are facing shortages in fresh water supply.
Q48. What human factors determine land use pattern?
What factors determine land use pattern?
The use of land is determined by physical factors such as topography, soil,
climate, minerals and availability of water. Human factors such as population
and technology are also important determinants of land use pattern.
Q49. What are landslides and how do they occur?
Ans. Landslides are simply defined as the mass
movement of rock, debris or earth down a slope. They often take place in
conjunction with earthquakes, floods and volcanoes. A prolonged spell of
rainfall can cause heavy landslide that can block the flow of river for quite
Q50. Why water availability per person in India is declining?
population, rising demands for food and cash crops, increasing urbanisation and
rising standards of living are the major factors leading to shortages in supply
of fresh water either due to drying up of water sources or water pollution.