About This Chapter
Class 10 Geography Chapter Minerals and Energy Resources explains the importance of minerals in everyday life and industrial development. It covers how minerals are formed, their different modes of occurrence, the distribution of important minerals in India, and the environmental problems caused by mining. The chapter also explains conventional and non-conventional energy sources, including coal, petroleum, natural gas, electricity, solar energy, wind energy, biogas, tidal energy and geothermal energy.
These notes follow the sequence of the supplied NCERT Contemporary India – II chapter. They include simplified explanations, key terms, original practice questions, suggested answers and a revision checklist.
Learn concepts in simple English.
Revise definitions, locations and classifications.
Answer MCQs and written questions.
Use the mind map and final test.
- Define minerals and explain their modes of occurrence.
- Distinguish between ferrous, non-ferrous and non-metallic minerals.
- Describe the distribution of major minerals in India.
- Explain the effects of mining and the need for conservation.
- Compare conventional and non-conventional energy resources.
- Suggest practical ways to conserve energy.
Minerals and Energy Resources
Complete Chapter Notes, Important Questions, NCERT Exercise Solutions and Quick Revision
Learn how minerals occur, where India's major mineral resources are found, how energy is produced, and why conservation is essential for sustainable development.
Start Learning ↓ Practice Questions Quick RevisionUse the chapter checklist and practice test at the end to check your preparation.
1. What Is a Mineral?
A mineral is a naturally occurring, homogeneous substance with a definable internal structure. Minerals are found in different forms, from very hard diamond to soft talc.
Rocks are combinations of minerals. Some rocks, such as limestone, may consist mainly of one mineral, while most rocks contain several minerals in different proportions.
Why are minerals important?
- They provide raw materials for industries.
- Metals used in vehicles, railway tracks, buildings and machinery are obtained from minerals.
- Minerals are used in electrical and electronic equipment.
- Minerals support construction, transport, manufacturing and economic development.
- Some minerals are essential nutrients for living organisms.
Mineral, rock and ore: Difference
| Term | Meaning | Example or note |
|---|---|---|
| Mineral | A naturally occurring substance with a definable internal structure. | Quartz, mica, copper-bearing minerals. |
| Rock | A natural mass made of one or more minerals. | Limestone may consist mainly of one mineral. |
| Ore | An accumulation of a mineral mixed with other elements from which extraction is commercially viable. | The mineral concentration and extraction cost matter. |
How do geographers and geologists study minerals?
| Geographers | Geologists |
|---|---|
| Study minerals in relation to landforms, distribution and economic activities. | Study how minerals form, their age and their physical and chemical composition. |
Exam Practice: Questions from This Topic
MUST PREPAREQ1. What is a mineral? (1 mark)
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IMPORTANT PRACTICEQ2. Differentiate between a mineral and an ore. (2 marks)
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Q3. Why are minerals important for economic development? (3 marks)
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- Minerals supply raw materials to industries.
- They provide metals for transport, machinery, construction and electrical equipment.
- Their extraction and processing support industrial and economic activities.
2. Mode of Occurrence of Minerals
Minerals are not distributed uniformly across the Earth's crust. Their location depends on geological structure, the processes involved in their formation and the time taken for those processes.
Minerals are commonly found in ores. The concentration of a mineral in the ore, the ease of extraction and the distance from markets influence whether a deposit can be mined economically.
Five main modes of occurrence
In igneous and metamorphic rocks, minerals may fill cracks, crevices, faults or joints. Smaller occurrences are called veins; larger ones are called lodes.
Examples: Tin, copper, zinc and lead.
In sedimentary rocks, minerals can occur in horizontal layers formed by deposition, accumulation and concentration.
Examples: Coal, some iron ores, gypsum, potash and sodium salts.
Weathering decomposes surface rocks and removes soluble materials, leaving mineral-rich residual material.
Example: Bauxite.
Some minerals accumulate in sands on valley floors or at the base of hills. These are called placer deposits.
Examples: Gold, silver, tin and platinum.
Ocean water contains dissolved minerals, while ocean beds may contain mineral nodules.
Examples: Common salt, magnesium and bromine from ocean water; manganese nodules on ocean beds.
A deposit is more likely to be mined when its mineral concentration is sufficient, extraction is feasible and transport to markets is practical. These factors influence the commercial viability of a reserve.
Exam Practice: Questions from This Topic
Q1. What are veins and lodes? (2 marks)
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Q2. How is bauxite formed? (2 marks)
Show answer
Q3. Distinguish between placer deposits and minerals in sedimentary layers. (3 marks)
Show answer
Q4. Assertion–Reason (1 mark)
Assertion: Bauxite is associated with residual deposits.
Reason: It can form when weathering removes soluble materials from surface rocks.
Show answer
3. Distribution of Minerals in India
India has rich and varied mineral resources, but they are unevenly distributed. Differences in geological structure, geological processes and the time involved in mineral formation explain these variations.
| Region or geological setting | Mineral pattern described in the textbook |
|---|---|
| Peninsular rocks | Contain many reserves of coal, metallic minerals, mica and other minerals. |
| Sedimentary rocks along the eastern and western flanks of the peninsula, Gujarat and Assam | Important petroleum deposits. |
| Rajasthan | Has reserves of many non-ferrous minerals. |
| North Indian alluvial plains | Almost devoid of economically significant minerals. |
Rat-hole mining
The textbook describes rat-hole mining in Meghalaya as extraction through long, narrow tunnels, historically carried out by families or local communities. It also notes that the National Green Tribunal declared such activities illegal and recommended stopping them. Mining laws and regulations may change, so current legal status should be checked against official sources when needed.
Map work
Use the mineral-distribution map in the supplied textbook (PDF page 5; printed textbook page 46) to locate iron ore fields, iron ore mines, exporting ports, manganese, bauxite and mica. Use the coal, oil and natural gas map (PDF page 10; printed page 51) for conventional energy resources.
Exam Practice: Questions from This Topic
Q1. Why are minerals unevenly distributed in India? (2 marks)
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Q2. Why is the Chota Nagpur Plateau region important for mineral resources? (3 marks)
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Q3. What factors determine whether a mineral reserve can be mined economically? (3 marks)
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- The concentration of the mineral in the ore.
- The ease and cost of extraction.
- The distance from markets and the practical ability to transport the mineral.
4. Ferrous Minerals
Ferrous minerals contain iron. According to the textbook, they account for about three-fourths of the total value of metallic mineral production and provide a strong base for metallurgical industries.
Iron ore
Iron ore is a basic mineral and an important foundation of industrial development. India has substantial resources of iron ore.
| Type | Important features |
|---|---|
| Magnetite | The finest iron ore described in the textbook, with iron content of up to 70%. It has excellent magnetic qualities and is valuable in the electrical industry. |
| Hematite | The most important industrial iron ore in terms of quantity used. The textbook gives an iron content of about 50–60%. |
Major iron ore belts of India
- Odisha–Jharkhand belt: High-grade hematite occurs at Badampahar in Odisha's Mayurbhanj and Kendujhar districts. In Jharkhand's Singhbhum district, iron ore is mined at Gua and Noamundi.
- Durg–Bastar–Chandrapur belt: Extends through Chhattisgarh and Maharashtra. The Bailadila range in Bastar district of Chhattisgarh contains high-grade hematite deposits.
- Ballari–Chitradurga–Chikkamagaluru–Tumakuru belt: Located in Karnataka. The textbook describes Kudremukh as a major deposit and notes that its ore is transported as slurry through a pipeline to a port near Mangaluru.
- Maharashtra–Goa belt: Includes Goa and the Ratnagiri district of Maharashtra. The textbook notes that the ore is exported through Marmagao port.
Manganese
Manganese is mainly used in manufacturing steel and ferro-manganese alloy. The textbook states that nearly 10 kg of manganese is required to manufacture one tonne of steel. It is also used in bleaching powder, insecticides and paints.
Exam Practice: Questions from This Topic
Q1. Which is the finest iron ore according to the textbook? (1 mark)
Show answer
Q2. Differentiate between magnetite and hematite. (3 marks)
Show answer
- Magnetite has iron content of up to 70%, while hematite is described as having about 50–60%.
- Magnetite has excellent magnetic qualities.
- Hematite is the most important industrial iron ore in terms of the quantity used.
Q3. Explain the importance of manganese. (2 marks)
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Q4. Name any two major iron ore belts of India. (2 marks)
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5. Non-Ferrous Minerals
Non-ferrous minerals do not contain iron as their principal metallic component. The textbook discusses copper and bauxite in detail and also mentions lead, zinc and gold.
Copper
- India is described in the textbook as deficient in copper reserves and production.
- Copper is malleable, ductile and a good conductor of electricity.
- It is used in electrical cables, electronics and chemical industries.
- Important copper-producing areas mentioned include the Balaghat mines in Madhya Pradesh, Khetri mines in Rajasthan and Singhbhum district of Jharkhand.
Bauxite
Bauxite is a clay-like ore from which alumina and then aluminium are obtained. It forms through the decomposition of rocks rich in aluminium silicates.
- Aluminium is light, strong, conductive and highly malleable.
- These properties make it useful in several manufacturing and engineering applications.
- The textbook identifies the Amarkantak Plateau, Maikal Hills and the Bilaspur–Katni plateau region among India's bauxite-bearing areas.
- For 2018–19, the textbook identifies Odisha as the largest bauxite-producing state and highlights the Panchpatmali deposits in Koraput district.
Exam Practice: Questions from This Topic
Q1. Name the mineral used to obtain aluminium. (1 mark)
Show answer
Q2. Why is copper used in electrical cables? (2 marks)
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Q3. State three properties that make aluminium useful. (3 marks)
Show answer
6. Non-Metallic and Rock Minerals
Mica
Mica is made up of a series of plates or leaves and splits easily into thin sheets. It may be clear, black, green, red, yellow or brown.
Its insulating properties, high dielectric strength and resistance to high voltage make it important in electrical and electronic industries.
Locations described in the textbook:
- The Koderma–Gaya–Hazaribagh belt of Jharkhand is a leading mica-producing region.
- Ajmer in Rajasthan is an important mica-producing area.
- The Nellore mica belt in Andhra Pradesh is also significant.
Limestone
Limestone is associated with rocks containing calcium carbonate or calcium and magnesium carbonates. It occurs in sedimentary rocks of many geological formations.
- It is the basic raw material for the cement industry.
- It is essential for smelting iron ore in a blast furnace.
| Mineral | Important property or use |
|---|---|
| Mica | Excellent electrical insulating properties; used in electrical and electronic industries. |
| Limestone | Essential raw material for cement and important in iron smelting. |
Exam Practice: Questions from This Topic
Q1. Why is mica important in the electrical industry? (2 marks)
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Q2. State two uses of limestone. (2 marks)
Show answer
7. Hazards of Mining
Mining provides minerals for everyday use and industrial development, but it can harm workers and the environment if proper precautions are not followed.
- Dust and harmful fumes can cause pulmonary diseases.
- Miners face occupational risks in confined and dangerous environments.
- Mine roofs may collapse.
- Water may flood mines.
- Fires can occur in coal mines.
- Mining can contaminate local water sources.
- Waste and slurry can pollute streams and rivers.
- Dumped waste damages land and soil.
- Mining can disturb local ecosystems.
Exam Practice: Questions from This Topic
Q1. Mention three hazards of mining. (3 marks)
Show answer
- Dust and harmful fumes can cause respiratory diseases.
- Mine roofs may collapse, and mines may face flooding or fires.
- Mining waste can contaminate water and degrade land and soil.
Q2. Suggest two measures to reduce mining hazards. (2 marks)
Show answer
8. Conservation of Minerals
Mineral resources are finite and non-renewable. The geological processes that create mineral deposits take millions of years, while modern society consumes minerals much more quickly.
The textbook notes that workable mineral deposits form only a small fraction of the Earth's crust. As easily accessible ores are exhausted, extraction may become more expensive and the quality of available ores may decline.
Why should minerals be conserved?
- Minerals are limited resources that cannot be replenished on a human timescale.
- Mineral formation is extremely slow compared with the rate of consumption.
- Continued extraction can increase costs and require mining at greater depths.
- Mining can damage land, water sources and ecosystems.
- Future generations will also need mineral resources.
Methods of mineral conservation
Avoid unnecessary wastage and use materials efficiently.
Reuse scrap metals to reduce the need for newly extracted ores.
Improve methods that allow lower-grade ores to be used economically.
Use suitable alternative materials where they can safely replace minerals.
Exam Practice: Questions from This Topic
Q1. Why are mineral resources considered non-renewable? (2 marks)
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Q2. Explain three methods of conserving minerals. (3 marks)
Show answer
- Recycle metals and use scrap materials.
- Develop improved technology to use lower-grade ores economically.
- Use minerals efficiently and adopt suitable substitutes where possible.
Q3. Assertion–Reason (1 mark)
Assertion: Mineral conservation is necessary.
Reason: Minerals form over very long geological periods and are consumed much faster.
Show answer
9. Energy Resources
Energy is required for cooking, lighting, heating, transport, agriculture, industries and domestic activities. Energy resources include fuel minerals such as coal, petroleum and natural gas, as well as electricity and other energy sources.
Classification of energy resources
| Conventional sources | Non-conventional sources |
|---|---|
| Firewood, cattle dung cakes, coal, petroleum, natural gas and electricity from hydel and thermal power. | Solar, wind, tidal, geothermal, biogas and atomic energy, as listed in the textbook's classification. |
Energy classifications can vary by context. For this chapter, use the categories presented in the supplied NCERT text.
Exam Practice: Questions from This Topic
Q1. What is energy used for? Give three examples. (2 marks)
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Q2. Differentiate between conventional and non-conventional energy sources. (3 marks)
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10. Coal
Coal is India's most abundantly available fossil fuel according to the textbook. It provides a substantial part of the country's energy needs and is used for power generation, industrial energy and domestic purposes.
Coal forms from plant material compressed over millions of years. Its type depends on the degree of compression, depth of burial and heat and pressure to which the material is subjected.
Types of coal
| Type | Features |
|---|---|
| Peat | Forms from decaying plants in swamps; has high moisture and low carbon content, with low heating capacity. |
| Lignite | Low-grade brown coal; soft and high in moisture. Neyveli in Tamil Nadu is a principal reserve mentioned in the textbook. |
| Bituminous | Forms when coal is buried deeply and exposed to increased temperatures. It is widely used commercially. |
| Metallurgical coal | High-grade bituminous coal valued for smelting iron in blast furnaces. |
| Anthracite | The highest-quality hard coal. |
Coal deposits in India
The textbook describes two main geological ages of coal deposits:
- Gondwana coal: A little over 200 million years old. Important deposits occur in the Damodar Valley, including Jharia, Raniganj and Bokaro. The Godavari, Mahanadi, Son and Wardha valleys also contain coal deposits.
- Tertiary coal: Around 55 million years old according to the textbook. Deposits occur in north-eastern states including Meghalaya, Assam, Arunachal Pradesh and Nagaland.
Coal is bulky and loses weight when used because it is reduced to ash. Locating industries and power stations near coalfields can reduce transport difficulties and costs.
Exam Practice: Questions from This Topic
Q1. Which is the highest-quality hard coal? (1 mark)
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Q2. Differentiate between Gondwana and Tertiary coal deposits. (3 marks)
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Q3. Why are thermal power stations often located near coalfields? (2 marks)
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Q4. Describe the distribution of coal in India. (5 marks)
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- India has coal deposits from Gondwana and Tertiary geological ages.
- Gondwana coal resources are concentrated in the Damodar Valley, including Jharia, Raniganj and Bokaro.
- Other coal-bearing valleys include the Godavari, Mahanadi, Son and Wardha.
- Tertiary coal occurs in Meghalaya, Assam, Arunachal Pradesh and Nagaland.
- Coal supports electricity generation, industry and domestic energy needs.
11. Petroleum and Natural Gas
Petroleum
Petroleum, or mineral oil, is an important energy source after coal in the textbook's discussion. It provides fuel for heat and lighting, lubricants for machinery and raw materials for manufacturing industries.
Petroleum refineries are called a nodal industry because their products support many other industries, including synthetic textiles, fertilisers and chemicals.
How petroleum occurs
Petroleum can accumulate in porous rocks such as sandstone or limestone. Non-porous rock layers prevent it from rising or sinking. It can also occur in fault traps. Natural gas, being lighter, is usually found above petroleum.
Important petroleum-producing areas mentioned in the textbook
- Mumbai High: An important offshore oil-producing area.
- Gujarat: Ankleshwar is identified as an important oil field.
- Assam: Described as India's oldest oil-producing state; important fields include Digboi, Naharkatiya and Moran–Hugrijan.
Natural gas
Natural gas is found with petroleum deposits and is released when crude oil is brought to the surface. It is used as a domestic and industrial fuel and as a raw material in chemical, petrochemical and fertiliser industries.
- It is used to generate electricity.
- It can be used as transport fuel in the form of CNG.
- It can be supplied to homes as cooking fuel in the form of PNG.
- Important reserves described in the textbook include Mumbai High and allied fields, the Cambay basin and the Krishna–Godavari basin.
Natural gas pipelines
The textbook describes the 1,700 km Hazira–Vijaipur–Jagdishpur (HVJ) pipeline constructed by GAIL (India). It connected Mumbai High and Bassein gas fields with fertiliser, power and industrial complexes in western and northern India.
Exam Practice: Questions from This Topic
Q1. Why are petroleum refineries called a nodal industry? (2 marks)
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Q2. State three uses of natural gas. (3 marks)
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Q3. Why is natural gas usually found above petroleum? (1 mark)
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12. Electricity: Hydel and Thermal Power
Electricity has a wide range of applications. The textbook notes that per capita electricity consumption is considered an indicator of development.
| Hydel electricity | Thermal electricity |
|---|---|
| Generated when flowing water drives turbines. | Generated by using fuels such as coal, petroleum or natural gas to drive turbines. |
| Uses water as the energy source; the water cycle is renewable. | Commonly depends on non-renewable fossil fuels. |
| Examples in the textbook include Bhakra Nangal, Damodar Valley Corporation and the Kopili Hydel Project. | Thermal power stations use fossil fuels to generate electricity. |
Exam Practice: Questions from This Topic
Q1. Distinguish between hydel and thermal electricity. (3 marks)
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Q2. Why is per capita electricity consumption used as an indicator of development? (2 marks)
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13. Non-Conventional Sources of Energy
Increasing energy consumption creates greater dependence on fossil fuels. Their potential shortages, rising prices and environmental impacts make it important to develop renewable energy alternatives.
Nuclear or atomic energy
Nuclear energy is obtained by altering the structure of atoms. The energy released as heat can be used to generate electricity. The textbook identifies uranium and thorium resources, including those in Jharkhand and the Aravalli ranges of Rajasthan. Monazite sands of Kerala are also described as rich in thorium.
Solar energy
Solar energy uses sunlight to produce useful energy. Photovoltaic technology converts sunlight directly into electricity.
- India receives abundant sunlight because it is a tropical country.
- Solar power can be especially useful in rural and remote areas.
- Solar energy can reduce dependence on firewood and dung cakes in some households.
- Greater use of solar power can support environmental conservation.
Wind energy
Wind turbines convert the energy of moving air into electricity. The textbook identifies a major wind-farm cluster in Tamil Nadu, from Nagarcoil to Madurai, and also mentions wind farms in Andhra Pradesh, Karnataka, Gujarat, Kerala, Maharashtra and Lakshadweep. Nagarcoil and Jaisalmer are highlighted as areas associated with wind energy.
Biogas
Biogas is produced through the decomposition of organic matter, such as shrubs, farm waste, animal waste and human waste.
- It can be used for domestic energy needs.
- Plants using cattle dung are commonly called gobar gas plants in rural India.
- Biogas can provide energy and improve manure quality.
- It can reduce the use of fuelwood and dung cakes.
Tidal energy
Tidal energy uses the rise and fall of ocean tides. Floodgate dams can trap water during high tide. When the water flows back to the sea, it can pass through a turbine and generate electricity.
The textbook identifies the Gulf of Khambhat, the Gulf of Kuchchh in Gujarat and the Sunderban region of the Gangetic delta in West Bengal as areas with suitable conditions for tidal energy.
Geothermal energy
Geothermal energy uses heat from the Earth's interior. In places with a high geothermal gradient, groundwater absorbs heat from rocks and may become hot enough to produce steam for driving turbines.
The textbook mentions experimental projects in the Parvati Valley near Manikaran in Himachal Pradesh and the Puga Valley in Ladakh.
| Energy source | Basic principle | Textbook example or location |
|---|---|---|
| Solar | Sunlight is converted into electricity by photovoltaic technology. | Useful for rural and remote areas. |
| Wind | Moving air turns wind turbines. | Tamil Nadu; also several other states and Lakshadweep. |
| Biogas | Organic waste decomposes and produces gas. | Gobar gas plants using cattle dung. |
| Tidal | Water movement caused by tides drives turbines. | Gulf of Khambhat, Gulf of Kuchchh and Sunderban region. |
| Geothermal | Heat from inside the Earth can produce steam. | Parvati Valley and Puga Valley experimental projects. |
| Nuclear | Energy released from changes in atomic structure is used to generate electricity. | Uranium and thorium are the fuels discussed. |
Exam Practice: Questions from This Topic
Q1. How does photovoltaic technology produce electricity? (2 marks)
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Q2. State two benefits of biogas plants. (2 marks)
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Q3. Why should India develop non-conventional energy sources? (3 marks)
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- Dependence on fossil fuels raises concerns about future supply and price fluctuations.
- Burning fossil fuels causes environmental problems.
- Renewable alternatives can diversify energy supplies and support sustainable development.
Q4. Explain how tidal energy can be generated. (3 marks)
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Q5. What is geothermal energy? Name two locations mentioned in the textbook. (3 marks)
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14. Conservation of Energy Resources
Energy is essential for every sector of the economy, including agriculture, industry, transport, commerce and households. Energy consumption has increased over time, creating a need for sustainable energy development.
The textbook identifies two important approaches: energy conservation and greater use of renewable energy sources.
Practical ways to conserve energy
- Use public transport instead of individual vehicles where practical.
- Switch off lights, fans and electrical appliances when they are not in use.
- Use energy-efficient and power-saving devices.
- Adopt renewable energy sources where suitable.
- Reduce unnecessary fuel consumption and avoid waste.
Exam Practice: Questions from This Topic
Q1. What are the two main approaches to sustainable energy development discussed in the chapter? (2 marks)
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Q2. Suggest four ways students and households can conserve energy. (4 marks)
Show answer
- Switch off lights and appliances when not needed.
- Use energy-efficient devices.
- Use public transport where practical.
- Use renewable energy sources where suitable and avoid unnecessary energy use.
Quick Revision Notes
Use this section for a final review before your test.
Important definitions
| Keyword | Revision definition |
|---|---|
| Mineral | A homogeneous, naturally occurring substance with a definable internal structure. |
| Ore | A mineral accumulation with sufficient concentration for commercially viable extraction. |
| Veins and lodes | Mineral occurrences filling cracks in igneous and metamorphic rocks; smaller ones are veins and larger ones are lodes. |
| Placer deposits | Mineral accumulations in sands of valley floors or at the base of hills. |
| Ferrous minerals | Minerals containing iron as a principal component. |
| Non-ferrous minerals | Metallic minerals other than iron-based minerals. |
| Fossil fuels | Fuel resources such as coal, petroleum and natural gas formed over geological time. |
| Geothermal energy | Energy obtained by using heat from the Earth's interior. |
| Biogas | Gas produced through the decomposition of organic matter. |
Facts to remember
Magnetite: up to 70% iron in the textbook. Hematite: about 50–60%.
Mainly used in steel and ferro-manganese alloy manufacture.
Ore from which alumina and then aluminium are obtained.
Splits into thin sheets and is valued for electrical insulation.
Important raw material for cement and iron smelting.
Peat, lignite, bituminous and anthracite are the main types described.
Usually occurs above petroleum because it is lighter.
Use resources efficiently, recycle and adopt suitable substitutes.
Chapter mind map
Common mistakes to avoid
- Do not confuse a mineral with an ore.
- Do not confuse magnetite with hematite.
- Do not write that all electricity is generated from the same fuel. Electricity can be generated using different sources.
- Do not confuse a renewable source such as solar energy with non-renewable fossil fuels.
- Do not treat the textbook's 2018–19 production charts as current statistics.
- For map questions, practise with the maps supplied in the NCERT chapter.
Revision checklist
Tick each item after you can explain it without looking at the notes.
0 of 11 revision points completed. This checklist is not saved permanently.
NCERT Exercise Solutions
These are suggested model answers based on the exercise questions in the supplied textbook PDF. They are not an official marking scheme.
Exercise 1: Multiple-choice questions
(i) Which mineral is formed by decomposition of rocks, leaving a residual mass of weathered material?
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(ii) Koderma, in Jharkhand, is the leading producer of which mineral?
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(iii) Minerals are deposited and accumulated in the strata of which rocks?
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(iv) Which mineral is contained in monazite sand?
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Exercise 2: Answers in about 30 words
(i)(a) Distinguish between ferrous and non-ferrous minerals.
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(i)(b) Distinguish between conventional and non-conventional sources of energy.
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(ii) What is a mineral?
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(iii) How are minerals formed in igneous and metamorphic rocks?
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(iv) Why do we need to conserve mineral resources?
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Exercise 3: Answers in about 120 words
(i) Describe the distribution of coal in India.
Show answer
India's coal deposits belong mainly to the Gondwana and Tertiary geological ages. Gondwana coal, a little over 200 million years old, is concentrated in the Damodar Valley, where Jharia, Raniganj and Bokaro are important coalfields. The Godavari, Mahanadi, Son and Wardha valleys also contain coal deposits. Tertiary coal, around 55 million years old according to the textbook, occurs in the north-eastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland. Coal is an important fuel for electricity generation, industry and domestic use. Because coal is bulky and loses weight when burned, heavy industries and thermal power stations are often located on or near coalfields to reduce transport difficulties.
(ii) Why do you think solar energy has a bright future in India?
Show answer
India is a tropical country with abundant sunlight and considerable potential for solar energy. Photovoltaic technology can convert sunlight directly into electricity. Solar power can be useful in rural and remote areas where conventional energy supply may be difficult. Its use can reduce dependence on fossil fuels and, in some households, reduce the need for firewood and dung cakes. Greater use of solar energy can also support environmental conservation. Solar energy therefore offers an important option for diversifying India's energy supply and promoting sustainable development. Its effective use depends on suitable technology, investment, infrastructure and local conditions.
Exercise activity: Crossword answers
| Clue | Suggested answer |
|---|---|
| Across 1: A ferrous mineral (9) | Manganese |
| Across 2: Raw material for cement industry (9) | Limestone |
| Across 3: Finest iron ore with magnetic properties (9) | Magnetite |
| Across 4: Highest quality hard coal (10) | Anthracite |
| Across 5: Aluminium is obtained from this ore (7) | Bauxite |
| Across 6: Khetri mines are famous for this mineral (6) | Copper |
| Across 7: Formed due to evaporation (6) | Potash |
| Down 1: Found in placer deposit (4) | Gold |
| Down 2: Iron ore mined in Bailadila (8) | Hematite |
| Down 3: Indispensable for electrical industry (4) | Mica |
| Down 4: Geological age of coal found in north-east India (8) | Tertiary |
| Down 5: Formed in veins and lodes (3) | Tin |
Crossword note: The answers above are based on the printed clues. If the letters in the scanned crossword grid do not align because of image quality, use the clues and chapter terminology to confirm the entries.
Final Practice Test
Class: 10 | Subject: Geography | Chapter: Minerals and Energy Resources
Suggested time: 30 minutes | Total: 20 marks
- Attempt all questions.
- Write answers in complete sentences.
- For longer answers, organise points logically.
- These are original practice questions, not a previous-year or official board paper.
Section A – MCQs (4 × 1 = 4 marks)
1. Which mineral is the principal ore for obtaining aluminium?
2. Which coal type is described as the highest-quality hard coal?
3. Which mineral is known for its electrical insulating properties?
4. Which energy source uses heat from the Earth's interior?
Section B – Short answers (4 × 2 = 8 marks)
5. What are veins and lodes? (2)
Show suggested answer
6. Give two reasons for conserving minerals. (2)
Show suggested answer
7. State two uses of natural gas. (2)
Show suggested answer
8. State two environmental or health hazards of mining. (2)
Show suggested answer
Section C – Long answers (2 × 4 = 8 marks)
9. Explain four methods of conserving mineral resources. (4)
Show suggested answer
- Use minerals efficiently and reduce wastage.
- Recycle metals and reuse scrap materials.
- Develop improved technology to use lower-grade ores economically.
- Use suitable substitutes where possible to reduce pressure on mineral reserves.
10. Explain four reasons why renewable energy sources are important for India. (4)
Show suggested answer
- They can reduce dependence on finite fossil fuels.
- They diversify energy supplies and improve long-term energy security.
- They can reduce environmental problems associated with fossil-fuel use.
- Sources such as solar and wind can provide energy in suitable rural and remote locations.
Frequently Asked Questions
1. What is a mineral in Class 10 Geography?
A mineral is a homogeneous, naturally occurring substance with a definable internal structure.
2. What are the five modes of occurrence of minerals?
Minerals may occur in veins and lodes, beds and layers, residual deposits, placer deposits, and ocean water or ocean beds.
3. What is the difference between magnetite and hematite?
Magnetite has iron content of up to 70% and excellent magnetic qualities. Hematite is the most important industrial iron ore by quantity used, with a lower iron content described in the textbook.
4. Why should mineral resources be conserved?
Minerals are finite and non-renewable on a human timescale. Recycling, efficient use, improved extraction technology and suitable substitutes can reduce pressure on reserves.
5. What is the difference between hydel and thermal electricity?
Hydel electricity uses flowing water to drive turbines. Thermal electricity uses fuels such as coal, petroleum or natural gas to drive turbines.
6. Which non-conventional energy sources are discussed in this chapter?
The chapter discusses nuclear or atomic energy, solar energy, wind energy, biogas, tidal energy and geothermal energy.
7. How can students prepare this chapter for an examination?
Learn definitions, practise mineral and energy classifications, revise important locations on the NCERT maps, write answers in clear points and attempt the practice test.
8. Does this page contain official CBSE previous-year questions?
No. The questions here are original practice questions and suggested answers based on the chapter. They should not be treated as verified previous-year questions or an official marking scheme.
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