Course Content
GS1
All topics given below
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1. Indian culture will cover the salient aspects of Art Forms, Literature and Architecture from ancient to modern times.
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2. Modern Indian history from about the middle of the eighteenth century until the present- significant events, personalities, issues.
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5. History of the world will include events from the 18th century such as Industrial revolution, World wars, Redrawal of national boundaries, Colonization, Decolonization, Political philosophies like Communism, Capitalism, Socialism etc.- their forms and effect on the society.
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7. Role of women and women’s organizations, Population and associated issues, Poverty and developmental issues, Urbanization, their problems and their remedies.
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10.2. Introduction to Maps
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GS2
All Updates topics given below
6. Structure, organization and functioning of the Executive and the Judiciary; Ministries and Departments of the Government; pressure groups and formal/informal associations and their role in the Polity.
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10. Government Policies and Interventions for Development in Various Sectors and Issues arising out of their Design and Implementation.
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12. Welfare schemes for Vulnerable Sections of the Population by the Centre and States and the Performance of these schemes; Mechanisms, Laws, Institutions and Bodies constituted for the Protection and Betterment of these Vulnerable Sections.
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13. Issues relating to Development and Management of Social Sector/Services relating to Health, Education, Human Resources.
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14. Issues relating to Poverty and Hunger.
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16. Role of Civil Services in a Democracy
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GS3
2. Inclusive growth and issues arising from it.
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4. Major crops – cropping patterns in various parts of the country, different types of irrigation and irrigation systems – storage, transport and marketing of agricultural produce and issues and related constraints; e-technology in the aid of farmers.
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5. Issues related to direct and indirect farm subsidies and minimum support prices; Public Distribution System- objectives, functioning, limitations, revamping; issues of buffer stocks and food security; Technology missions; economics of animal-rearing.
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6. Food processing and related industries in India- scope and significance, location, upstream and downstream requirements, supply chain management.
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11. Science and Technology- developments and their applications and effects in everyday life.
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12. Achievements of Indians in Science & Technology; indigenization of technology and developing new technology.
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13. Awareness in the fields of IT, Space, Computers, robotics, nano-technology, bio-technology and issues relating to intellectual property rights.
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16. Linkages between development and spread of extremism.
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19. Security challenges and their management in border areas; -linkages of organized crime with terrorism.
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GS3: ENVIRONMENT
UPSC Full Course [English]
About Lesson

C.2. Structure Of The Atmosphere

[Title: Structure of Atmosphere]

The structure of the atmosphere is as follows

TROPOSPHERE

The lowest layer of the atmosphere is known as the troposphere. It has an average height of about 13 km, extending approximately 8 km near the poles and reaching up to 18 km at the equator. This layer is vital for all forms of biological activity, as it contains the air we breathe and where most weather phenomena occur.

STRATOSPHERE

Above the troposphere lies the stratosphere, which extends up to 50 km in altitude. This layer holds a high concentration of ozone (O₃), which plays a crucial role in absorbing harmful ultraviolet radiation. Since weather events do not occur in the stratosphere and air movement is mostly horizontal, it is considered ideal for aircraft navigation.

MESOSPHERE

The mesosphere is the third layer, situated above the stratosphere, and it extends to about 80 km above the Earth’s surface.

THERMOSPHERE

The ionosphere is located between 80 to 400 km above the mesopause.

Radio waves transmitted from the earth are reflected back to the earth by this layer and due to this, radio broadcasting has become possible.

The temperature here starts increasing with height.

The uppermost layer of the atmosphere is called the Exosphere.

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