Extra Questions for Class 10th: Ch 5 Minerals and Energy Resources Social Studies (S.St) Important Questions Answer Included
Very Short Answer Questions (VSAQs):Answer
May occur in cracks, crevices, faults and joints.
2. How do minerals occur in sedimentary rocks?
Answer
2. How do minerals occur in sedimentary rocks?
Answer
In beds or layers.
3. Name some minerals formed in beds and layers.
Answer
3. Name some minerals formed in beds and layers.
Answer
Coal, and some forms of iron ore.
4. Which rock consists of single mineral only?
Answer
4. Which rock consists of single mineral only?
Answer
Limestone.
5. Why are there a wide range of colours, hardness, crystal forms, lustre and density found in minerals?
Answer
5. Why are there a wide range of colours, hardness, crystal forms, lustre and density found in minerals?
Answer
Due to physical and chemical conditions.
6. How does mining affect the health of miners?
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6. How does mining affect the health of miners?
Answer
The dust and the noxious fumes inhaled by the miners makes them vulnerable to pulmonary diseases.
7. What is hematite?
Answer
7. What is hematite?
Answer
Hematite ore is the most important industrial iron ore in terms of the quantity used.
8. How did the Bailadila iron-ore field get its name?
Answer
8. How did the Bailadila iron-ore field get its name?
Answer
The Bailadila hills look like the hump of an ox, hence Bailadila iron-ore field get its name.
Short Answer Questions (SAQs):
1. How is mining activity hazardous? Explain.
Answer
The mining activity is injurious to the health of the miners and environment as:
• The dust and noxious fumes inhaled by miners make them vulnerable to pulmonary diseases.
• The risk of collapsing mine roofs.
• Inundation and fires in coalmines are a constant threat to miners.
2. Name the non-metallic mineral which can split easily into thin sheets. Mention its uses.
Answer
Mica is the non-metallic mineral which can be split easily into thin sheets. Mica is used in:
• Mica is used in electric and electronic industries due to its excellent di-electric strength, low power loss factor, insulating properties and resistance to high voltage.
• Plastic industry also uses mica as an extender and filler.
3. What are ‘placer deposits’? Give examples of minerals found in such deposits.
Answer
• Certain minerals may occur as alluvial deposits in sands of valley floors and base of hills. These deposits are called ‘placer deposits’.
• They generally contain minerals which are not corroded by water.
• Gold, silver, tin and platinum are examples of some important minerals found in ‘placer deposits’.
4. Name the mineral ore from which aluminium is extracted? Why is it gaining importance? Give its distribution in India.
Answer
Bauxite.
• Aluminium is gaining importance because of its extreme lightness, good conductivity and great malleability. It combines the strength of metals such as Iron.
• It is mainly found in Amarkantak Plateau, Maikal Hills and the plateau region of Bilaspur-Katni. Koraput district in Odisha has large deposits. Odisha is the largest bauxite producing state. Others are Gujarat, Maharashtra and Jharkhand.
5. What are the uses of copper? Name the two leading copper producing states of India.
Answer
Uses of copper:
• In manufacturing electrical cables.
• In electronic industries.
• In chemical industries.
The two leading copper producing states of India are Madhya Pradesh and Rajasthan.
Long Answer Questions (LAQs):
1. Highlight the importance of petroleum. Explain the occurrence of petroleum in India.
Answer
Importance of Petroleum:
• Petroleum is the major energy source in India.
• Provides fuel for heat and lighting.
• Provides lubricant for machinery.
• Provides raw material for a number of manufacturing industries.
• Petroleum refineries act as nodal industry for synthetic, textile, fertilizer and chemical industries.
Its occurrence:
• Most of the petroleum occurrences in India are associated with anticlines and fault traps.
• In regions of folding, anticline or domes, it occurs where oil is trapped in the crest of the upfold
• Petroleum is also found in fault traps between porous and non-porous rocks.
2. Explain the importance of conservation of minerals. Highlight any three measures to conserve them.
OR
Why is conservation of mineral resources essential? Explain any three methods to conserve them.
Answer
Reasons for Conservation:
• The strong dependence of industry and agriculture upon minerals.
• The process of mineral formation is slow.
• They are non-renewable.
Methods to conserve:
• Minerals should be used in a planned and sustainable manner.
• Improved technology needs to be constantly evolved to allow use of low grade ore at low cost.
• Recycling of metals using scrap metals.
• Wastage in the mining and processing should be minimised.
High Order Thinking Skills (HOTS):
1. There is an urgent need to develop a sustainable path of energy development. Give two broad measures for it. As concerned citizens, how can you help to conserve energy?
Answer
Twin planks/measures:
• Promotion of energy conservation.
• Increased use of renewable energy sources. As concerned citizens we can do our bit by:
• Using public transport systems instead of individual vehicles.
• Switching off electricity when not in use.
• Using power–saving devices.
• Using non-conventional sources of energy.
2. “Minerals are indispensible part of our lives’. Support the statement with examples.
Answer
Minerals are an indispensable part of our lives:
• Almost everything we use, from a tiny pin to a towering building or a big ship, all are made from minerals.
• The railway lines and the tarmac (paving) of the roads, our implements and machinery too are made from minerals.
• Cars, buses, trains, aeroplanes are manufactured from minerals and run on power resources derived from the earth.
• Even the food that we eat contains minerals.
• In all stages of development, human beings have used minerals for their livelihood, decoration, festivities, religious and ceremonial rites.