CBSE Class 10 Social Science Study Materials

Case Study Question 1

A Class 10 Geography teacher shows different samples of rocks to her students. One rock is shiny and hard, another is dull and porous, and a third one contains small glittering particles. She explains that these glittering particles are minerals and talks about their definite chemical composition and crystal structure. She also points out that minerals are formed by natural geological processes and are unevenly distributed on the earth’s crust.

On the basis of the above passage, answer the following questions:

(a) Define a mineral.
(b) Why are minerals considered non-renewable resources?
(c) Give any two physical properties used to identify minerals.

Answers:

A mineral is a naturally occurring substance having a definite chemical composition and an orderly atomic structure.
Minerals are non-renewable because they are formed by geological processes over millions of years and cannot be replenished within a human life span.
Two physical properties are: colour, hardness, lustre, density and cleavage (any two).

Case Study Question 2

A mining company is studying a rock deposit in a hilly region. Geologists find that the rock contains a metal in small quantity, but the extraction cost is very high compared to the value of the metal obtained. The company concludes that this deposit cannot be mined profitably and decides to search for another deposit with higher metal content and lower cost of extraction.

Answer the following questions:

(a) What is meant by an ore?
(b) Why is every mineral deposit not considered an ore?
(c) Name one example of an ore and its metal.

Answers:

An ore is a rock containing sufficient quantity of a mineral so that the mineral can be extracted profitably.
Every mineral deposit is not considered an ore because, if the mineral is present in very low concentration or if the cost of extraction is very high, it is not economically profitable to mine it.
Bauxite is an ore of aluminium; hematite is an ore of iron (any one correct pair).

Case Study Question 3

In a classroom discussion, students are asked to list different ways in which minerals occur. One student says that minerals occur in cracks and crevices of rocks, another adds that minerals are also found in layers in sedimentary rocks, and a third student mentions that minerals can be found in sands of river beds. The teacher appreciates their answers and explains the various modes of occurrence of minerals.

On the basis of the above case, answer the following questions:

(a) What are veins and lodes?
(b) How do minerals occur in sedimentary rocks?
(c) What are placer deposits?

Answers:

Veins are small and lodes are large mineral deposits that fill cracks, crevices, faults or joints in rocks, particularly igneous and metamorphic rocks.
In sedimentary rocks, minerals occur in beds or layers formed due to deposition, compaction and cementation of sediments over a long period of time.
Placer deposits are alluvial deposits of minerals found in sands of valley floors and river beds, formed by mechanical concentration of heavy minerals.

Case Study Question 4

A group of students visit a plateau region where they see red soil and patches of exposed rock surfaces. The guide tells them that this area receives heavy rainfall and experiences intense weathering. Due to leaching, soluble materials are washed away and insoluble aluminium compounds remain, forming an important ore used for making aircraft and utensils.

Based on the given information, answer the following questions:

(a) Which ore is being referred to in the passage?
(b) What type of deposit is formed here?
(c) Name the process responsible for the formation of this deposit.

Answers:

The ore referred to is bauxite, the ore of aluminium.
A residual deposit is formed in this area.
Intense chemical weathering and leaching are responsible for the formation of this deposit.

Case Study Question 5

An industrialist wants to set up an iron and steel plant and is advised to choose a location near the Chhota Nagpur Plateau region. He studies a map and finds that this region has large deposits of coal, iron ore, manganese and other minerals. He also notes the presence of railways and rivers that can help in transport and power generation.

Answer the following questions:

(a) Name the mineral belt mentioned in the passage.
(b) List any two important minerals found in this belt.
(c) How does the presence of these minerals support the iron and steel industry?

Answers:

The mineral belt is the North-Eastern Plateau Region or the Chhota Nagpur Plateau belt.
Two important minerals are coal and iron ore (others: manganese, bauxite, mica).
Iron ore provides raw material for steel, coal is used as fuel in blast furnaces, and manganese is used as an alloy, all of which support the iron and steel industry.

Case Study Question 6

A Geography project group compares mineral distribution in different parts of India. They observe that Rajasthan and Gujarat are rich in limestone, gypsum, mica and other non-metallic minerals, while the alluvial plains of the north have very few mineral deposits. The group concludes that mineral distribution in India is highly uneven.

On the basis of the above case, answer the following questions:

(a) Which mineral region of India includes Rajasthan and Gujarat?
(b) Name any two non-metallic minerals found in this region.
(c) Why is mineral distribution in India said to be uneven?

Answers:

Rajasthan and Gujarat come under the North-Western Region of mineral distribution.
Two non-metallic minerals: limestone and gypsum (others: mica, rock phosphate, salt).
Mineral distribution is uneven because minerals occur only in areas where favourable geological processes have taken place, leaving other regions, such as alluvial plains, almost devoid of mineral resources.

Case Study Question 7

A student preparing for map-based questions in Geography carefully marks the major iron ore producing states of India. She marks Odisha, Chhattisgarh, Karnataka and Jharkhand and also identifies nearby ports used for exporting iron ore. She realises that these states are part of important mineral belts which influence the location of industries.

Answer the following questions:

(a) Name any two major iron ore producing states of India.
(b) How does the distribution of iron ore influence the location of iron and steel plants?
(c) Why are ports important for mineral-producing regions?

Answers:

Any two: Odisha, Chhattisgarh, Jharkhand, Karnataka.
Iron and steel plants are usually located near iron ore deposits to reduce transport costs of bulky raw materials and to ensure regular supply.
Ports enable export of minerals like iron ore to other countries and help in importing machinery and other inputs required by mineral-based industries.

Case Study Question 8

The government wants to promote balanced regional development. It observes that mineral-rich regions such as parts of Jharkhand and Odisha have many mining and industrial activities, whereas some other regions have few mineral-based industries. The government plans to develop infrastructure and other industries in mineral-poor areas to reduce regional imbalances.

Based on the case, answer the following:

(a) Why do mineral-rich regions often develop mining and heavy industries?
(b) How can mineral-poor regions still achieve economic development?
(c) Give one reason why balanced regional development is important.

Answers:

Mineral-rich regions develop mining and heavy industries because raw materials are easily available there, reducing transport costs and attracting investment and infrastructure.
Mineral-poor regions can develop other sectors such as agriculture, textiles, tourism, IT and services, along with better transport, education and health facilities.
Balanced regional development is important to reduce economic disparities, avoid over-concentration of population and resources, and ensure social and political stability.

Case Study Question 9

A steel plant manager explains to trainees that the quality of steel produced in the plant depends largely on the quality of iron ore and the proper use of manganese. He mentions two major types of iron ore—hematite and magnetite—and explains that manganese is used to remove impurities and make steel hard and tough.

Answer the following questions:

(a) Name the two main types of iron ore mentioned.
(b) Why is manganese added during steel production?
(c) Classify iron ore and manganese as ferrous or non-ferrous minerals.

Answers:

The two main types of iron ore are hematite and magnetite.
Manganese is added to remove impurities like sulphur and oxygen and to make steel hard, strong and tough.
Both iron ore and manganese are ferrous minerals because they contain iron.

Case Study Question 10

An engineer working in the electrical industry explains that copper and aluminium are the two major metals used for making wires and cables. Copper is an excellent conductor of electricity, while aluminium is light, strong and corrosion-resistant. He also mentions that India has limited copper reserves and imports part of its requirement.

On the basis of the above information, answer the following:

(a) Why is copper widely used in electrical industries?
(b) State one important property of aluminium which makes it useful in transport.
(c) Classify copper and aluminium as ferrous or non-ferrous minerals.

Answers:

Copper is widely used because it is an excellent conductor of electricity and heat, ductile and resistant to corrosion.
Aluminium is light in weight yet strong and corrosion-resistant, which makes it very useful in transport (aircraft, vehicles, etc.).
Both copper and aluminium are non-ferrous minerals as they do not contain iron.

Case Study Question 11

A company is planning to set up an aluminium plant in a plateau region of India where laterite soils and heavy rainfall are common. The region also has good transport facilities and access to power. The company expects to get its main raw material from bauxite mines located nearby.

Answer the following questions:

(a) Which ore is the raw material for aluminium?
(b) What type of climatic and soil conditions favour the formation of this ore?
(c) Name any two Indian states where this ore is commonly found.

Answers:

Bauxite is the raw material (ore) for aluminium.
Hot and humid climate with heavy rainfall and laterite soils favour the formation of bauxite through leaching and residual weathering.
Two states: Odisha and Gujarat (others: Jharkhand, Chhattisgarh, Maharashtra).

Case Study Question 12

A student makes a table comparing ferrous and non-ferrous minerals. Under ferrous minerals, she writes iron ore, manganese and chromite. Under non-ferrous minerals, she lists copper, bauxite, lead and zinc. She concludes that both types of minerals are necessary for a balanced industrial and economic development.

Based on the above case, answer the following:

(a) What is the basic difference between ferrous and non-ferrous minerals?
(b) Give two examples each of ferrous and non-ferrous minerals.
(c) Why does a country need both types of minerals for development?

Answers:

Ferrous minerals contain iron, whereas non-ferrous minerals do not contain iron.
Ferrous: iron ore, manganese (others: chromite); Non-ferrous: copper, bauxite (others: lead, zinc).
Ferrous minerals support steel and heavy industries, while non-ferrous minerals are essential for electrical, transport, aviation and high-tech industries. Both are needed for diversified and balanced industrial development.

Case Study Question 13

During a visit to an electrical goods factory, students see sheets of a shiny, flaky mineral being used to insulate electrical equipment. The engineer tells them that this mineral can be split into thin sheets, is a very good insulator and can withstand high temperatures. It is obtained mainly from the plateau regions of Jharkhand and Andhra Pradesh.

Answer the following questions:

(a) Identify the mineral described in the passage.
(b) State any two uses of this mineral.
(c) Name any two states where this mineral is found.

Answers:

The mineral is mica.
Uses: It is used as an insulator in electrical and electronic industries and in making capacitors and appliances; also used in paints and cosmetics (any two).
Two states: Jharkhand and Andhra Pradesh (also found in Rajasthan).

Case Study Question 14

A cement factory displays a poster showing limestone, clay and gypsum as major raw materials. It also mentions that limestone is used as a flux in the iron and steel industry. The company highlights that cement and steel are basic materials for building houses, bridges, dams and roads in the country.

On the basis of the case, answer the following:

(a) Name the main non-metallic mineral used as raw material in cement industry.
(b) How does this mineral help in iron and steel production?
(c) Why are cement and steel called basic industries?

Answers:

Limestone is the main non-metallic mineral used in the cement industry.
Limestone is used as a flux to remove impurities like silica and alumina from iron ore during smelting, forming slag and helping to obtain pure iron.
Cement and steel are called basic industries because they provide essential raw materials and infrastructure for other industries and for construction of buildings, roads, bridges and dams.

Case Study Question 15

A newspaper article warns that at the present rate of extraction and consumption, many mineral resources may get depleted in the near future. It suggests measures such as recycling metals, using substitutes, improving mining technology and reducing wasteful consumption. The article stresses that minerals are non-renewable and must be conserved for future generations.

Answer the following questions:

(a) Why are minerals considered non-renewable?
(b) Mention any two measures suggested for conserving minerals.
(c) How does recycling help in mineral conservation?

Answers:

Minerals are considered non-renewable because they take millions of years to form and cannot be replenished quickly once exhausted.
Two measures: recycling of metals, using substitutes, improving mining technology, reducing wastage (any two).
Recycling reduces the need for fresh mining, saves energy, decreases environmental damage and conserves existing mineral reserves.

Case Study Question 16

A mining company is asked by the government to follow sustainable mining practices. These include scientific planning of extraction, preventing land degradation, safe disposal of waste, and reclamation of mined land by afforestation. Local communities are also to be consulted and compensated wherever necessary.

Based on the above case, answer the following:

(a) What is meant by sustainable mining?
(b) State any two environmental measures included in sustainable mining.
(c) Why is it important to involve local communities in mining projects?

Answers:

Sustainable mining means extracting minerals in a way that meets present needs while minimising environmental damage and ensuring that future generations are not deprived of resources.
Two measures: preventing land degradation, safe disposal of waste, reclamation and afforestation of mined land (any two).
Local communities are directly affected by mining; involving them ensures fair compensation, protects their rights, reduces conflicts and promotes socially just development.

Case Study Question 17

An environmental group studies a region where thermal power plants are concentrated. They find that burning coal releases large amounts of smoke and gases, causing air pollution and respiratory problems among local people. They recommend improving the efficiency of plants, using cleaner fuels and gradually shifting to renewable sources of energy.

Answer the following questions:

(a) Name the conventional source of energy used in thermal power plants.
(b) Mention any two environmental problems caused by thermal power plants.
(c) Suggest any two alternatives to reduce dependence on coal-based thermal power.

Answers:

Coal is the main conventional source of energy used in thermal power plants.
Two problems: air pollution due to smoke and gases, emission of greenhouse gases like CO₂, and ash disposal issues (any two).
Alternatives: promoting hydel power, solar power, wind energy, nuclear energy and other renewable sources (any two).

Case Study Question 18

A village in a sunny region of India decides to install solar panels on rooftops of homes and school buildings. The villagers are happy because they now get reliable electricity for lights, fans and mobile charging. The panchayat also sets up solar street lights and a small biogas plant for cooking fuel.

On the basis of the above situation, answer the following:

(a) Name the two non-conventional energy sources used by the village.
(b) State any two advantages of using solar energy in rural areas.
(c) How does the use of biogas benefit rural households?

Answers:

The two non-conventional sources are solar energy and biogas.
Advantages of solar energy: it is renewable, free once installed, environment-friendly, and suitable for decentralised power supply in remote areas (any two).
Biogas provides clean and smokeless fuel for cooking and the slurry left after gas production is a good organic manure that enriches soil fertility.

Case Study Question 19

A large city faces frequent traffic jams and high levels of air pollution. The municipal corporation encourages people to use public transport, metro rail, car-pooling and bicycles. It also runs awareness campaigns on saving fuel and conserving energy. Schools organise “No Vehicle Day” once a month.

Answer the following questions:

(a) How does using public transport help in conserving energy resources?
(b) Mention any two benefits of car-pooling and cycling.
(c) Why is energy conservation important for cities?

Answers:

Using public transport reduces the number of private vehicles on roads, leading to lower fuel consumption per person and conservation of petrol and diesel.
Benefits: car-pooling and cycling reduce fuel use and traffic congestion, decrease air pollution, and promote health in the case of cycling (any two).
Energy conservation is important for cities to reduce pollution, manage limited fuel resources, cut energy costs and improve the quality of life for residents.

Case Study Question 20

A science club prepares a poster on “Save Energy, Save Earth”. The poster suggests switching off lights and fans when not in use, using LED bulbs, operating air-conditioners at moderate temperatures, and choosing energy-efficient appliances. It highlights that saving energy at home and school can reduce electricity bills and protect the environment.

Based on the case, answer the following:

(a) State any two simple measures of conserving electricity at home.
(b) How do energy-efficient appliances help in conservation of energy?
(c) Give one environmental benefit of saving electricity.

Answers:

Two measures: switching off lights and fans when not in use; using LED bulbs instead of ordinary bulbs; operating ACs at moderate temperatures (any two).
Energy-efficient appliances use less electricity to perform the same work, thereby reducing overall energy consumption and conserving energy resources.
Saving electricity reduces the need to generate power from fossil-fuel-based plants, thereby reducing air pollution and greenhouse gas emissions.

CBSE Class 10 Social Science – Chapter Wise Study Materials Based on NCERT

Topic 1: What is a Mineral? & Mode of Occurrence of Minerals

Topic 2: Where Are These Minerals Found? – Major Mineral Belts

Topic 3: Ferrous and Non-Ferrous Minerals

Topic 4: Non-Metallic Minerals & Conservation of Minerals

Topic 5: Energy Resources & Conservation of Energy Resources

Minerals and Energy Resources – Case-based Questions with Answers

CBSE Class 10 Social Science – Chapter Wise Study Materials Based on NCERT

Topic 1: What is a Mineral? & Mode of Occurrence of Minerals

Topic 2: Where Are These Minerals Found? – Major Mineral Belts

Topic 3: Ferrous and Non-Ferrous Minerals

Topic 4: Non-Metallic Minerals & Conservation of Minerals

Topic 5: Energy Resources & Conservation of Energy Resources

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