BOOK2 CH7 Minerals And Energy Resources (Important Question Answer)
BOOK2 INDIA PEOPLE AND ECONOMY
CH7 MINERALS AND ENERGY RESOURCES
IMPORTANT QUESTION ANSWER
Very Short Answer Questions
Question 1.Why is there a wide range of colours, hardness, crystal forms, lustre and density
found in minerals?
Answer: A wide range of colours, hardness, crystal forms, lusture and density is found in minerals because a particular mineral is formed from a certain combination of elements and depends upon the physical and chemical conditions under which the material forms.
found in minerals?
Answer: A wide range of colours, hardness, crystal forms, lusture and density is found in minerals because a particular mineral is formed from a certain combination of elements and depends upon the physical and chemical conditions under which the material forms.
Question 2. How do minerals occur in igneous and metamorphic rocks?
Answer: In igneous and metamorphic rocks minerals occur in the cracks, crevices, faults or joints. The smaller occurrences are called veins and the larger ones are called lodes.
Answer: In igneous and metamorphic rocks minerals occur in the cracks, crevices, faults or joints. The smaller occurrences are called veins and the larger ones are called lodes.
Question 3. How do minerals occur in sedimentary rocks?
Answer: In sedimentary rocks, minerals occur in beds or layers. They are deposited in horizontal stratas.
Question 4. Why should the use of cattle cake as fuel be discouraged?
Answer: The use of cattle cake as fuel should be discouraged because huge loss of trees
will be there when we burn cattle cake and use it as source of fuel. It must be consumed in biogas plants for its effective usage.
Answer: The use of cattle cake as fuel should be discouraged because huge loss of trees
will be there when we burn cattle cake and use it as source of fuel. It must be consumed in biogas plants for its effective usage.
Question 5. How are gobar gas plants beneficial to the farmers?
Answer: Gobar gas plants are beneficial to the farmers because they provide energy and
improved quality of manure.
Question 6. Why does aluminum metal have great importance?
Answer: Aluminium metal has great importance because it combines the strength of metals
such as iron, with extreme lightness and also with good conductivity and great malleability. It can be used as a substitute for steel.
Question 7. How is iron ore transported from Kudremukh mines to a port near Mangalore?
Answer: From Kudremukh mines to a port near Mangalore, the iron ore is transported as slurry through a pipeline.
Question 8. How does mining affect the health of miners?
Answer: Mining produces dust and noxious fumes, which are inhaled by the miners. It
makes them vulnerable to pulmonary diseases.
Short Answer Questions
Question 9.‘Consumption of energy in all forms has been rising all over the country. There is an urgent need to develop a sustainable path of energy development and energy saving.’ Suggest and explain any three measures to solve this burning problem.
Answer: The following are the measures to solve this burning problem.
We should use public transport instead of personal vehicles as much as possible.
We should switch off electricity when not in use.
We should switch to power-saving devices.
We should keep our power equipment well maintained.
Above all, use of non-conventional sources of energy would be of great help in overcoming the
problem.
Question 10. ‘There is a pressing need to use renewable energy resources.’ Justify the statement with suitable arguments.
Answer: The given statement can be justified by the following arguments.
1) Increased consumption
2) There are uncertainities about the energy supplies in future because of their potential shortages.
3)Use of non renewable sources have serious consequence on the growth of national economy as they are getting expensive day by day.
4)Above all, non-renewable sources pose a great threat in the form of pollution and other
environmental issues.
5)Solar, wind, tide, biomass and energy from waste material can thus, be proved advantageous in
long run
Question 11. Highlight the importance of petroleum.Explain the occurrence of petroleum in India.
Answer: The importance of petroleum is as follows:
1)It provides fuel for heating and lighting.
2)It provides lubricants for machinery and raw materials for many manufacturing industries.
3)Petroleum refineries act as a ‘nodal industry’ for synthetic textiles, fertiliser and chemical industries.
(any two)
The occurrence of petroleum in India:
1)Most of the petroleum in India is found in anticlines and fault traps in the rock formations of the
tertiary age.
2)In regions of folding, anticlines or domes, it occurs where oil is trapped in the crest of the upfold.
3)The oil-bearing layer is porous limestone or sandstone through which oil may flow. The oil is
prevented from sinking or rising by intervening non-porous layers
Answer: Gobar gas plants are beneficial to the farmers because they provide energy and
improved quality of manure.
Question 6. Why does aluminum metal have great importance?
Answer: Aluminium metal has great importance because it combines the strength of metals
such as iron, with extreme lightness and also with good conductivity and great malleability. It can be used as a substitute for steel.
Question 7. How is iron ore transported from Kudremukh mines to a port near Mangalore?
Answer: From Kudremukh mines to a port near Mangalore, the iron ore is transported as slurry through a pipeline.
Question 8. How does mining affect the health of miners?
Answer: Mining produces dust and noxious fumes, which are inhaled by the miners. It
makes them vulnerable to pulmonary diseases.
Short Answer Questions
Question 9.‘Consumption of energy in all forms has been rising all over the country. There is an urgent need to develop a sustainable path of energy development and energy saving.’ Suggest and explain any three measures to solve this burning problem.
Answer: The following are the measures to solve this burning problem.
We should use public transport instead of personal vehicles as much as possible.
We should switch off electricity when not in use.
We should switch to power-saving devices.
We should keep our power equipment well maintained.
Above all, use of non-conventional sources of energy would be of great help in overcoming the
problem.
Question 10. ‘There is a pressing need to use renewable energy resources.’ Justify the statement with suitable arguments.
Answer: The given statement can be justified by the following arguments.
1) Increased consumption
2) There are uncertainities about the energy supplies in future because of their potential shortages.
3)Use of non renewable sources have serious consequence on the growth of national economy as they are getting expensive day by day.
4)Above all, non-renewable sources pose a great threat in the form of pollution and other
environmental issues.
5)Solar, wind, tide, biomass and energy from waste material can thus, be proved advantageous in
long run
Question 11. Highlight the importance of petroleum.Explain the occurrence of petroleum in India.
Answer: The importance of petroleum is as follows:
1)It provides fuel for heating and lighting.
2)It provides lubricants for machinery and raw materials for many manufacturing industries.
3)Petroleum refineries act as a ‘nodal industry’ for synthetic textiles, fertiliser and chemical industries.
(any two)
The occurrence of petroleum in India:
1)Most of the petroleum in India is found in anticlines and fault traps in the rock formations of the
tertiary age.
2)In regions of folding, anticlines or domes, it occurs where oil is trapped in the crest of the upfold.
3)The oil-bearing layer is porous limestone or sandstone through which oil may flow. The oil is
prevented from sinking or rising by intervening non-porous layers
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