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Social StudiesClass 10CBSE

Which one of the following is a rabi crop? (a) Rice (b) Millets (c) Gram (d) Cotton

Gram

Social StudiesClass 10CBSE

Which one of the following describes a system of agriculture where a single crop is grown in a large area? (a) Shifting Agriculture (b) Plantation Agriculture (c) Horticulture (d) Intensive Agriculture

Plantation agriculture

Social StudiesClass 10CBSE

Why do you think that solar energy has a bright future in India?

Solar energy has a bright future in India because we are a tropical country with enormous possibilities for tapping solar energy. Solar energy is fast becoming popular in rural and remote areas. India’s largest solar power plant is located at Madhapur, near Bhuj, where solar energy is used to sterilise milk cans. It is expected that the use of solar energy will be able to minimise the dependence of rural households on firewood and dung cakes, which in turn, will contribute to environmental conservation and adequate supply of manure in agriculture. Solar energy is a non-conventional source of energy which is also renewable. Use of solar energy will not only be good for the environment, but it will also reduce our dependence on oil and gas.

Social StudiesClass 10CBSE

Describe the distribution of coal in India

In India, coal can be found in rock series of two main geological ages: Gondwana (200 million years old) Tertiary deposits (55 million years old) The major resources of Gondwana coal are located in: Damodar Valley (West Bengal – Jharkhand) – Jharia, Raniganj and Bokaro are important coalfields. Godavari valley Mahanadi valley Son valley Wardha valley Tertiary coal occurs in the northeastern states of Meghalaya, Assam, Arunachal Pradesh and Nagaland.

Social StudiesClass 10CBSE

How are minerals formed in igneous and metamorphic rocks?

In igneous and metamorphic rocks, minerals can occur in the cracks, crevices, faults or joints. The smaller deposits are called veins, and the larger ones are called lodes.

Social StudiesClass 10CBSE

What is a mineral?

Minerals can be defined as homogenous, naturally occurring substances with a definable internal structure. Minerals are found in varied forms in nature, ranging from the hardest diamond to the softest talc.

Social StudiesClass 10CBSE

Distinguish between the following in not more than 30 words. a. Ferrous and non-ferrous minerals b. Conventional and non-conventional sources of energy

Ferrous minerals are metallic minerals containing iron. For e.g., iron ore, manganese, nickel, cobalt, etc. While non-ferrous minerals are also metallic, they do not contain iron. For e.g., gold, copper, zinc, etc. Conventional sources of energy include firewood, cattle dung cake, coal, petroleum, natural gas and electricity (both hydel and thermal). While non-conventional sources of energy are solar, wind, tidal, geothermal, biogas and atomic energy.

Social StudiesClass 10CBSE

Which one of the following minerals is contained in the Monazite sand? (a) Oil (b) Uranium (c ) Thorium (d) Coal

Solution: (c ) Thorium

Social StudiesClass 10CBSE

Minerals are deposited and accumulated in the strata of which of the following rocks? (a) Sedimentary Rocks (b) Metamorphic Rocks (c ) Igneous Rocks (d) None of the above

Solution: (a) Sedimentary Rocks

Social StudiesClass 10CBSE

Koderma, in Jharkhand, is the leading producer of which one of the following minerals? (a) Bauxite (b) Mica (c ) Iron Ore (d) Copper

Solution: (b) Mica

Social StudiesClass 10CBSE

Which one of the following minerals are formed by the decomposition of rocks, leaving a residual mass of weathered material? (a) Coal (b) Bauxite (c ) Gold (d) Zinc

Solution: (b) Bauxite

Social StudiesClass 10CBSE

Write a note on the changing nature of international trade in the last fifteen years.

Trade between countries is known as international trade. International trade has undergone a vast change in the last fifteen years. The exchange of goods and commodities has been superseded by the exchange of information and knowledge. For e.g., India has emerged as a software giant at the international level, and it is earning large foreign exchange through the export of information technology. International trade also depends on the relationship between the countries and other external factors like duties and tariffs on the transportation of goods. In the last fifteen years, different trade blocks have emerged, which have changed how international trade was conducted previously.

Social StudiesClass 10CBSE

Why are the means of transportation and communication called the lifelines of a nation and its economy?

The means of transportation and communication are called the lifelines of a nation and its economy because they are the prerequisites for fast development. Today, India is well-linked with the rest of the world despite its vast size, diversity and linguistic and socio-cultural plurality. Railways, airways, waterways, newspapers, radio, cinema, television and the internet have been contributing to its socio-economic progress in many ways. Along with trade, these different means of transport and communication have enriched our life and added substantially to growing amenities and facilities for the comforts of life.

Social StudiesClass 10CBSE

What is meant by trade? What is the difference between international and local trade?

The exchange of goods among people, states and countries is referred to as a trade. Trade between countries is called international trade. Local trade is carried out within cities, towns and villages of a country.

Social StudiesClass 10CBSE

What is the significance of the border roads?

Border roads are of strategic importance, and these roads in the bordering areas of the country have improved accessibility in areas of difficult terrain and have helped in the economic development of these areas.

Social StudiesClass 10CBSE

Where and why is rail transport the most convenient means of transportation?

Rail transport is the most convenient means of transportation in the northern plains, as there are level stretches of land with high population density and rich agricultural resources.

Social StudiesClass 10CBSE

State any three merits of roadways.

Three merits of roadways are The construction cost of roads is much lower than that of railway lines. Road transport is economical in the transportation of a few persons and a relatively smaller amount of goods over short distances. Roads can traverse comparatively more dissected and undulating topography.

Social StudiesClass 10CBSE

Which one of the following terms is used to describe trade between two or more countries? a. Internal trade b. International trade c. External trade d. Local trade

(b ) International Trade

Social StudiesClass 10CBSE

Which one of the following is the most important mode of transportation in India? a. Pipeline b. Railways c. Roadways d. Airways

(b) Railways

Social StudiesClass 10CBSE

Which one of the following ports is the deepest land-locked and well-protected port along the east coast? a. Chennai b. Paradip c. Tuticorin d. Vishakhapatnam

Vishakhapatnam

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