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Chapter 1: Weather and Climate

Core Concepts and Definitions

1. What are the elements of weather?
   The elements of weather are temperature, pressure, wind, and humidity.
2. What is Weather?
   Weather refers to atmospheric conditions such as temperature, pressure, wind, humidity, and precipitation for a shorter period of time.
3. What is Climate?
   Climate is the average weather condition experienced for a longer period (about 35 to 40 years) over a larger area.
4. What are the major processes of heat transfer from the Earth's surface to the atmosphere?
   The major processes are Conduction, Convection, Advection, and Radiation.
5. Define Terrestrial Radiation.
   Terrestrial radiation is the re-radiation of energy in the form of long waves from the earth’s surface after it gets heated by insolation.
6. What is the Greenhouse Effect?
   The absorption of terrestrial radiation by atmospheric gases like carbon dioxide, which heats up the atmosphere, is termed the Greenhouse Effect.
7. What is the Heat Budget of the Earth?
   The process where almost the entire energy reaching the earth as insolation is radiated back every day, keeping the surface temperature balanced, is called the Heat Budget of the Earth.
8. What is the most important reason why the Heat Budget is essential for sustaining life on Earth?
   The heat budget ensures that the surface temperature of the earth remains balanced without becoming extremely hot or cold.
9. When are the maximum and minimum temperatures of the day usually recorded?
   The maximum temperature is usually recorded around 2 pm. The minimum temperature is usually recorded just before sunrise.
10. Define Diurnal Range of Temperature.
    Diurnal range of temperature is the difference between the maximum temperature and the minimum temperature of a day.
11. Define Daily Mean Temperature.
    The average temperature of a day is called the Daily Mean Temperature.
12. What are Isotherms?
    Isotherms are imaginary smooth curved lines drawn on maps connecting places having equal temperature.
13. What is the significance of the incidence of the sun’s rays near the equator compared to the poles?
    Along the equatorial regions, the incidence of the sun’s rays is almost vertical, resulting in very high temperature; the incidence is more inclined towards the poles, causing temperature to decrease gradually towards both poles.
14. What is Normal Lapse Rate?
    The phenomenon of gradual decrease in atmospheric temperature at the rate of 6.4º Celsius per kilometre of altitude is termed the Normal Lapse Rate.
15. Why do places situated at higher elevations generally experience low temperature?
    Atmospheric temperature gradually decreases with an increase in altitude, following the Normal Lapse Rate.
16. Why is the diurnal range of temperature generally low in Kerala?
    The winds blowing from land to sea and vice versa help to moderate the temperature experienced along coastal areas, which results in a generally low diurnal range.
17. What is Atmospheric Pressure?
    Atmospheric pressure is the weight exerted by the atmospheric air over the earth’s surface.
18. List the factors affecting atmospheric pressure.
    The factors are temperature, altitude, and humidity.
19. What are Isobars?
    Isobars are smooth curved lines drawn on maps to connect places having equal atmospheric pressure.
20. What is Doldrum?
    The Equatorial Low Pressure Belt, a zone of vertical air currents devoid of winds, is called Doldrum.
21. How does the rotation of the Earth influence the formation of pressure belts?
    The rotation of the Earth causes the continuous throwing up of air along 60º North and 60º South latitudes, leading to the formation of Sub Polar Low Pressure Belts.
22. What are Air Currents and Winds?
    Air Currents are the vertical movements of air, and Winds are the horizontal movements of air from high pressure areas to low pressure areas.
23. What is the Coriolis Force?
    Coriolis Force is a major factor influencing the direction of winds.
24. How does the Coriolis effect influence wind direction in the hemispheres?
    The Coriolis effect causes winds to deflect towards the right of its direction in the Northern Hemisphere and towards the left of its direction in the Southern Hemisphere.
25. What is Pressure Gradient?
    Pressure gradient is the change in pressure over a horizontal distance. High pressure gradient indicates strong winds.
26. What are Permanent Winds?
    Permanent winds, also known as prevailing winds or planetary winds, blow constantly over a particular direction throughout the year.
27. What are the major Permanent Winds?
    The major permanent winds are Trade winds, Westerlies, and Polar winds.
28. What is the Inter Tropical Convergence Zone (ITCZ)?
    ITCZ is the equatorial low pressure region where the trade winds from the Northern Hemisphere and the Southern Hemisphere converge.
29. What is the Monsoon wind system?
    The term ‘monsoon’ implies the seasonal reversal in the wind pattern.
30. Define Humidity.
    Humidity is the invisible water content in the atmosphere.
31. What is Absolute Humidity?
    Absolute humidity is the actual amount of water vapour present per unit volume of atmosphere.
32. Define Relative Humidity.
    Relative Humidity is the ratio between the actual amount of water present in the atmosphere and the total water-holding capacity of atmosphere at that particular temperature and time, expressed in percentage.
33. What is the saturation level?
    The state at which the atmosphere is fully saturated with moisture/water vapour is known as the saturation level.
34. What are the Forms of Condensation?
    The forms of condensation include Dew, Frost, Mist and Fog, and Clouds.
35. What is Precipitation?
    As the size of water droplets in clouds increases beyond the limit of resistance against gravity, water droplets are released and fall on earth in various forms; this is termed precipitation.
36. What are the different forms of precipitation?
    The different forms of precipitation are Rainfall, Snowfall, and Hailstones.
37. How does Orographic (Relief) Rainfall occur?
    Moisture-laden winds from the sea enter the land and are raised along the mountain slopes, leading to condensation and rain clouds along the windward slopes of mountains.
38. What are Rain Shadow Regions?
    These are the leeward sides of mountains where descending dry air makes the region rainless.
39. How does Convectional Rainfall occur?
    This occurs due to the convection process, often resulting in afternoon rains during the summer season.
40. What is Cyclonic (Frontal) Rainfall?
    This type of rainfall occurs in cyclonic systems where warm and cold air meet, causing the warm air to be raised up, leading to condensation and rainfall.

Calculations

41. Calculate the diurnal range of temperature and the daily mean temperature if the maximum and minimum temperatures of a place are 36º C and 28º C respectively.
    • Diurnal Range of Temperature = Maximum temperature (36º C) – Minimum temperature (28º C) = 8º C.
    • Daily Mean Temperature = (Maximum temperature (36º C) + Minimum temperature (28º C)) / 2 = 64º C / 2 = 32º C.

Reasons/Explanations

42. Why is the distribution pattern of isotherms not uniform (e.g., noticeable bend along land-sea confluences)?
    Compared to the sea, land gets heated and cooled at a faster rate, causing land areas to experience higher summer temperature and lower winter temperature when compared to the sea.
43. Winds are comparatively stronger over oceans than over continents. Why?
    The friction caused by hills, mountains, forests, and man-made structures on continents obstructs the free flow of winds, while over oceans, friction is less.
44. In equatorial climatic regions, convectional rainfall is a diurnal phenomenon. Why?
    High temperature prevails in the equatorial region, causing the expansion and rising up of air. This high temperature and high rate of evaporation cause heavy downpours of convectional rain, often in the afternoons.
45. While Kerala receives Southwest monsoon rains, the western parts of Tamil Nadu receive very little rainfall. Why?
    This occurs because the western parts of Tamil Nadu fall in the Rain Shadow Region of the mountains, due to the Orographic Rainfall phenomenon.

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Chapter 2: Climatic Regions and Climate Change

Core Concepts and Definitions

46. What is a climatic region?
    A climatic region is an extensive geographical area in which similar climate characteristics are observed.
47. What are the characteristics of the Equatorial climatic region?
    This region is characterised by high temperatures and high rainfall throughout the year, with sun's rays falling almost vertically.
48. Why are hot deserts located mostly on the western margins of continents in the tropical region?
    As the trade winds travel across the continents and reach the western margins, the wind loses its moisture and becomes dry, keeping these margins dry throughout the year.
49. What are Oases?
    Oases are formed in hot deserts in places where water sources are found.
50. What are the characteristics of the Mediterranean Climatic Region?
    It is characterised by dry summers and humid winters, with winter rainfall distinguishing it from other climatic regions.
51. Why is the Taiga region absent in the high latitudes of the Southern Hemisphere?
    The extent of landmass is generally less in the high latitudes of the Southern Hemisphere.
52. What is the meaning of the word 'Taiga'?
    Taiga is the Russian word for ‘coniferous trees’.
53. How does the UN define ‘climate change’?
    The UN defines ‘climate change’ as a long-term shift in weather patterns and temperatures that is caused by human activity or natural variability.
54. What are the elements of climate that are subject to shift due to climate change?
    Atmospheric temperature, pressure, winds, precipitation, and humidity are the elements of climate.
55. List some Natural and Anthropogenic causes of climate change.
    • Natural: Volcanic eruption, Ocean currents.
    • Anthropogenic (Human Activity): Deforestation, Oil mining, Industrialization.
56. What are Greenhouse Gases?
    Certain gases in the atmosphere, such as carbon dioxide and nitrous oxide, that are capable of trapping solar energy (insolation) are known as Greenhouse Gases.
57. What is Global Warming?
    The increase in atmospheric temperature caused by the strengthening of the greenhouse effect due to the excess production of greenhouse gases from human activities is called Global Warming.
58. List the sources of excess greenhouse gases in the atmosphere.
    Burning of fossil fuels such as coal and petroleum, industrial effluents, and solid waste are the sources of excess greenhouse gases.
59. What is Climate Migration?
    Climate migration refers to the migration of people who are being forcibly displaced by the impacts of climate change-induced disasters such as droughts, floods, desertification, sea-level rise, and sea inundation.
60. Who are Climate Refugees?
    Those who have to leave their homes and livelihood due to climate-related phenomena are called climate refugees.

International Initiatives for Climate Protection

61. List key international initiatives regarding climate and environment.

Initiative	Year	Place	Interventions
World Meteorological Organisation	1950	Geneva	Organises world climate conferences.
Stockholm Conference	1972	Stockholm	Environmental conservation and development.
Earth Summit	1992	Rio de Janeiro	Prepared UN Agenda 21 to promote environment friendly development.
Montreal Protocol	1987	Montreal	Reduce the production and consumption of ozone depleting substances.
Kyoto Protocol	1997	Kyoto	Reduce the amount of Green House gases in the atmosphere.
Paris Agreement	2015	Paris	Reduce Global warming, helping world nations to cope up with the harmful effects of climate change.

Regions and Agriculture

62. Why are crops like rice, sugarcane, jute, cotton, tea, and coffee called tropical crops?
    These crops are cultivated in the monsoon climatic region, which is characterised by high rainfall and high temperature, typical of tropical areas.
63. Lumbering is more industrialized in the Taiga region than in the equatorial region. Why?
    In the equatorial region, commercial extraction is challenging because the hardwoods are too heavy to be floated down streams, and the forest density hinders transportation. Taiga forests, dominated by coniferous trees, are highly suitable for industrialized lumbering.

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Chapter 3: From The Rainy Forests to The Land of Permafrost

Equatorial Climatic Region

64. To which heat zone does the Equatorial Climatic Region belong?
    The Equatorial Climatic Region belongs to the Torrid Zone.
65. Why is this climatic region called the equatorial climatic region?
    It is located along the equator (up to 10˚ North and South latitudes) and is characterised by consistently high temperature and heavy rainfall throughout the year due to receiving vertical solar rays.
66. Why is the rainforest found in the equatorial climatic region also called equatorial evergreen forests?
    In these tropical rainforests, there is no particular season for seeding, flowering, fruiting, and shedding leaves, so they remain evergreen throughout the year.
67. Why are equatorial evergreen rainforests often referred to as the 'Lungs of the World'?
    These forests absorb carbon dioxide and produce oxygen at a massive rate, leading to this term.
68. What are arboreal animals?
    Arboreal animals are wildlife that spend most of their lives in trees.
69. Define Maloca and Kampongs.
    • Maloca: A distinct type of house with steep-sided slanting roofs used by people in the Amazon Basin.
    • Kampongs: Villages in the equatorial regions of Malaysia where houses are mainly made of wood, bamboo, and leaves.
70. What are the challenges faced by the equatorial climatic region?
    Challenges include:
    • High heat and humidity which encourage the spread of insects, pests, germs, and bacteria, leading to widespread diseases like sleeping sickness and yellow fever.
    • Lack of basic amenities in remote parts.
    • Thick, luxuriant forests hindering the construction of roads and railway lines.
    • Hardwoods being too heavy to float down streams, hindering commercial lumbering.
    • Absence of grazing land and insect attacks on animals, limiting livestock rearing.
    • Human-induced forest deterioration and deforestation.
71. In spite of being situated in the equatorial climatic region, Kilimanjaro is snow-covered throughout the year. Why?
    Atmospheric temperature gradually decreases with an increase in altitude (Normal Lapse Rate). Kilimanjaro is the highest mountain peak in Africa, meaning its high altitude maintains freezing temperatures.

Tundra Climatic Region

72. What are the characteristics of the Arctic or Polar Climate (Tundra)?
    The polar climate is characterised by short summers and long winters, with a very low mean annual temperature. In mid-winter, temperature falls between -25 and -35 degrees Celsius.
73. What is Permafrost?
    Permafrost is the layer of soil beneath the surface in the Tundra region that is permanently frozen.
74. What are blizzards?
    Blizzards are strong snowstorms that blow over the Tundra region, often causing heavier snowfall.
75. Define Igloo.
    Igloos are the dome-shaped, temporary shelters made out of blocks of snow by Eskimos in the Tundra region.
76. What are sledges?
    Sledges are a distinct type of vehicle used for transportation in some areas of the Tundra, which slides over snow and is usually pulled by dogs.

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Chapter 4: Consumer: Rights and Protection

Consumer Theory and Types of Goods

77. What are the various factors that influence consumption?
    Factors influencing consumption include Price, quality/satisfaction derived, income, taste/preference, and expectations.
78. What is Utility?
    Utility is the want-satisfying power of a commodity/good.
79. What is Total Utility (TU)?
    Total utility is the total amount of utility that a person receives when he continuously consumes several units of a particular commodity.
80. What is Marginal utility (MU)?
    Marginal utility is the change in total utility that occurs when one additional unit of a commodity is consumed.
81. What is the Law of Diminishing Marginal Utility?
    Marginal Utility from consuming each additional unit of a commodity declines as its consumption increases, while keeping consumption of other commodities constant.
82. What are the assumptions and limitations of the Cardinal Utility Theory?
    • Assumptions (for Law of Diminishing Marginal Utility): All products must be of the same quality, and the consumer's income and tastes do not change.
    • Limitations (of the Law): Consumption must be continuous; the use of other goods must be ascertained; and units must be of a fixed quantity and quality.
83. Classify and define the types of goods and services.

Type of Good	Peculiarities/Definition
Free goods	Abundant in nature, freely available to everyone, need not be paid for.
Economic goods	Goods and services purchased and used for a price; can often be manufactured or collected from nature.
Consumer goods	Final goods used by consumers to satisfy wants; bought/sold for a price and not subjected to the production process again.
Capital goods	A physical product used in the production of another product; assists in the production process.
Durable goods	Things that last for a long time and can be reused.
Non-Durable goods	Items that can be used only for a short period of time.

Consumer Protection and Rights

84. What are the objectives of the Consumer Protection Movement?
    The objectives are: to protect consumer rights, to prevent frauds, to empower consumers, to legislate, to ensure the credibility of advertisements, and to ensure representation of consumers in political forums.
85. What is the aim of the Consumer Protection Act 2019?
    This Act aims at empowering consumers and protecting their rights.
86. List the features of the Consumer Protection Act 2019.
    1. Established The Central Consumer Protection Authority (CCPA) to protect and enforce consumer rights.
    2. Covers rules to prevent unfair trade practices by e-commerce platforms.
    3. Helps in simplifying the consumer dispute resolution process.
    4. Provides for punishment of those who manufacture or sell adulterated counterfeit goods.
    5. Prohibits the dissemination of misleading advertisements.
    6. Guarantees the right to consumer education.
87. What are the consumer rights ensured by law?
    1. Right to Safety: Right to be protected from goods and services that pose a threat to life and property.
    2. Right to Choose: Right to choose goods and services at competitive prices.
    3. Right to Know: Right to know the quality, quantity, purity, and price of goods to protect the consumer from unfair trade practices.
    4. Right to Seek Redressal: Right to seek redressal from unfair trade practices and consumer exploitation.
    5. Right to Consumer Education: The right to acquire the knowledge and skills to be an informed consumer.
88. What are the three levels of Consumer Courts in India?
    1. District Consumer Disputes Redressal Commission (Cases involving compensation up to Rs. 1 crore).
    2. State Consumer Disputes Redressal Commission (Cases involving compensation of Rs. 1 crore to Rs. 10 crore).
    3. National Consumer Disputes Redressal Commission (Cases involving compensation exceeding Rs. 10 crore).
89. What is Consumer Education?
    Consumer education is about educating consumers about their rights, responsibilities, choices of products and services, differences in markets, and consumer laws.
90. List the objectives of Consumer Education.
    The objectives of consumer education are:
    1. To protect consumer rights.
    2. To make consumers aware of their responsibilities.
    3. To ensure safety in trade, especially online trade.
    4. To identify ethics and regulations in the market.
    5. To create awareness about consumer protection laws.
    6. To ensure health safety.
    7. To promote consumer justice.

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Chapter 5: Money and Economy

Functions and Characteristics of Money

91. What is money generally called?
    Anything accepted in the exchange of goods and services can generally be called money.
92. What are the general functions of Money?
    1. Medium of Exchange: Goods and services can be sold for money, and that money can be used to purchase goods and services, making transactions crucial.
    2. Measure of Value: The value of all goods can be expressed in monetary terms, making it easy to compare the values of two goods.
    3. Store of Value: Money is accepted by everyone, making it possible to store the value of any good or asset for future use.
    4. Means of Deferred Payments: It facilitates business activities by allowing financial transactions (borrowing and lending) to be settled at a later date.
93. What is the value of money?
    The value of money is its purchasing power.
94. What characteristics should money possess?
    Money should be generally accepted and durable.
95. What is the velocity of circulation of money?
    The velocity of circulation of money is the number of times a unit of money is exchanged in a given period of time.

The Reserve Bank of India (RBI) and Monetary Policy

96. Who is the central bank of India?
    The Reserve Bank of India (RBI) is the central bank of India.
97. What are the key functions of the Reserve Bank of India (RBI)?
    1. Printing and Issuing Currency (except coins and one rupee notes).
    2. Bankers' Bank (providing emergency loans, maintaining reserves, settling transactions between banks).
    3. Controls the supply of money and credit.
    4. Acts as the government's bank (maintaining accounts, providing banking services, advising on fiscal/monetary policy).
    5. Custodian of foreign exchange reserves.
    6. Publication of Reports.
98. Who prints one rupee note and coins?
    Coins and one rupee notes are printed and issued by the Ministry of Finance, Government of India.
99. What is demonetization?
    Demonetization is when the Reserve Bank of India withdraws currency notes in circulation based on the government's instructions.
100. What is inflation?
     Inflation is an increase in the general price level of goods and services.
101. How is inflation in India measured?
     Inflation in India is measured using the Consumer Price Index (CPI), prepared by the National Statistical Office (MOSPI).
102. What are the concepts of money supply (M1, M2, M3, M4)?
     * M1 = Coins and currency notes held by the public + savings deposits in commercial banks.
     * M2 = M1 + savings deposits in post office savings banks.
     * M3 = M1 + net fixed deposits in commercial banks.
     * M4 = M3 + total deposits in post offices (excluding National Savings Certificates).
     * M1 and M2 are narrow money; M3 and M4 are broad money.
103. How does the RBI control inflation using bank rates?
     When inflation increases, the RBI increases the repo rate and reverse repo rate. This reduces the money available with commercial banks and increases saving by the public, thereby decreasing the money supply in the economy and controlling inflation.
104. What is Repo Rate and Reverse Repo Rate?
     * Repo Rate: The rate of interest charged by the Reserve Bank of India on the loans taken by commercial banks from the RBI.
     * Reverse Repo Rate: The rate of interest given by the Reserve Bank of India on the deposits by the commercial banks.
105. What is Fiscal Policy and Monetary Policy?
     * Fiscal Policy: The policy regarding taxation and government spending.
     * Monetary Policy: The policy regarding the supply of money and the rate of interest.
106. What is Cash Reserve Ratio (CRR)?
     CRR is the amount of money banks must keep as reserves with the Reserve Bank out of the money they receive as deposits.

Commercial Banks and Financial Inclusion

107. How are banks classified?
     Banks can be broadly classified into commercial banks and cooperative banks.
108. What are the main functions of commercial banks?
     The main functions are to accept deposits from the public and to provide loans.
109. What are the types of deposit accounts offered by commercial banks?
     1. Savings Deposit: Allows withdrawals subject to restrictions, generally offers low interest.
     2. Current Deposit: Intended for business transactions, no limit on transactions, no interest paid, provides overdraft facility.
     3. Term Deposit (Fixed Deposit Account): Money deposited for a fixed period; earns higher interest than savings deposits.
     4. Recurring Deposits: Fixed amount deposited at regular intervals; earns higher interest than savings deposits but lower than fixed deposits.
110. Why do banks offer higher interest rates on fixed deposits than on savings deposits?
     Fixed deposits involve money that is not needed to be withdrawn immediately, offering banks greater stability and allowing them to pay more interest.
111. Define NEFT, RTGS, Core Banking, and UPI.
     * NEFT (National Electronic Fund Transfer System): A system introduced by the RBI for easier and faster bank transactions using the IFSC (Indian Financial System Code).
     * RTGS (Real Time Gross Settlement): A system introduced by the RBI to transfer large amounts of money quickly between account holders.
     * Core Banking: A system enabling an account holder to carry out financial transactions from any branch of that bank.
     * UPI (Universal Payment Interface): A payment system developed by the NPCI that enables real-time, simple, and secure money transfers between bank accounts using a mobile application.
112. What are non-banking financial institutions (NBFIs)?
     NBFIs are financial institutions that operate in the banking sector but perform only some of the functions of a bank; they cannot accept savings and deposits from the public, and money cannot be withdrawn using cheques.
113. What are the sources of credit in India?
     Sources are classified into Formal and Informal Sources of Credit:
     * Formal: Banks, Non-Banking Financial Institutions, Self-Help Groups, Microfinance Institutions.
     * Informal: Local Money Lenders, Friends, Relatives, Other Methods.
114. What is Credit Deposit Ratio?
     Credit Deposit Ratio measures the proportion of a bank's deposits that are used for loans.
115. What are the main objectives of bank nationalization (1969 and 1980)?
     1. To expand banking facilities in rural areas.
     2. To provide credit to farmers at lower rates.
     3. To ensure equitable distribution of credit.
     4. To prevent the concentration of economic power in a few people.
116. What are the objectives of co-operative banks?
     The objectives are to inculcate the habit of saving among villagers, to protect the common people from private moneylenders, and to provide low-cost loans to farmers and small businessmen.
117. What is Microfinance?
     Microfinance aims to provide financial services to low-income individuals, families, and businesses who do not have access to conventional banking services.
118. What is the Jan Dhan Account scheme?
     The scheme aims to open a bank account for all those who do not have one, with a special feature of zero minimum balance. It promotes financial literacy and banking habits among the low-income group.

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Chapter 6: The Changing Earth

Earth Movements and Disasters

119. What are Earth Movements?
     Earth movements are the movements that cause the ups and downs on the surface of the Earth.
120. How are Earth Movements categorized?
     Earth movements are categorized into Endogenic Movements (caused by forces within the Earth) and Exogenic Movements (caused by external forces on the surface).
121. List the Causative Forces of Endogenic Movements.
     Radioactivity within the Earth, primordial heat, the rotation of the Earth, variations in geothermal gradient, and convection currents.
122. List the Causative Forces of Exogenic Movements.
     Slope of the area, gravity, pressure exerted on an object by another, molecular stress due to temperature changes, running water, glaciers, wind, groundwater, and different chemical actions.
123. What is a Convection Current?
     It is the continuous cyclic movement of magma in the mantle, driven by thermal variations, where magma heats up, rises toward the crust, cools, and sinks back down.
124. What are Diastrophic Movements?
     These are endogenic movements that collectively move, elevate, or build up portions of the Earth’s crust.
125. What are the differences between epeirogenic movements and orogenic movements?
     * Epeirogenic Movements: Processes that cause the upliftment of a large portion of the Earth’s crust, resulting in only minimal deformation.
     * Orogenic Movements: Processes that cause the formation of mountains and severely deform the Earth’s surface (e.g., formation of fold mountains).
126. What are the two types of Endogenic Sudden Movements?
     Volcanism and Earthquakes.
127. Define Volcanism.
     Volcanism is the process that includes the formation of magma, its movement and the movement of other pyroclastic materials toward the surface, their eruption through holes and cracks, explosions, lava flow, solidification of magma, and the formation of various igneous landforms and associated processes.
128. What is the difference between Magma and Lava?
     Molten rock material present in the upper mantle is called magma. Once it starts moving towards the crust or reaches the surface, it is referred to as lava.
129. What is the lithosphere?
     The outermost layer of the Earth, called the crust, along with the uppermost portion of the mantle, together form the lithosphere, with an average thickness of 100 kilometres.
130. What is the asthenosphere?
     A zone lying just below the solid lithosphere where rocks exist in a partially molten (semi-liquid) state; magma rises from this zone to the Earth's surface.
131. What are Volcanoes?
     Volcanoes are the openings in the lithosphere through which molten rock material, gases, ash, pyroclastic materials (rock fragments), dust, and water vapour erupt to the surface of the Earth.
132. What is the name of the extensive area in India where soil has been formed from the disintegration of lava rocks?
     The Deccan Province.
133. What are the major impacts of volcanic eruptions on human life?
     Volcanic explosions cause loss of lives and property, disrupt economic activities, and leave people homeless and jobless due to lava flow destroying houses and land.
134. What are the usefulness of volcanic activities to humankind?
     1. The ash from volcanoes and soil formed by solidified lava rocks are very fertile, suitable for agriculture.
     2. Geothermal energy released from volcanic regions is converted into electricity.
     3. Lava is rich in minerals, and many valuable minerals reach the surface.
     4. Volcanic regions often attract a large number of tourists.
135. What is the primary reason for earthquakes (tectonic earthquakes)?
     The friction between lithospheric plates along their margins restricts their movement, causing high tension to build up. When the pressure overcomes the friction, a sudden movement (rupture) occurs, releasing energy as seismic waves.
136. What is the Focus (Hypocentre) of an earthquake?
     The point inside the Earth from which the energy is released is called the focus or hypocentre.
137. What is the Epicentre of an earthquake?
     The point on the Earth's surface directly above the focus; seismic waves reach this point first.
138. Name the three types of waves generated from the focus of an earthquake.
     Primary waves, secondary waves, and surface waves (surface waves are the most destructive).
139. Name the instrument and scale used to measure earthquakes.
     The instrument is a seismograph, which records earthquake waves. The scale devised by Charles F. Richter in 1935 to measure an earthquake’s magnitude is called the Richter scale.
140. What are Shadow Zones of an earthquake?
     At certain distances from the focus, there are places where seismic waves are not recorded; such areas are called the shadow zones.
141. List the possible disasters caused by earthquakes (based on the Turkey/adjoining areas news).
     The disasters caused by earthquakes include:
     * Widespread destruction of hundreds of buildings.
     * Loss of thousands of people's lives.
     * Shattering of transportation and communication systems.
     * Failure of water distribution.
     * Disruption of food supply and shortage of medicines.
     * Landslides and fires hindering rescue operations.
142. How are tsunamis formed?
     Tsunamis are severe earthquakes that occur on the ocean floor, causing giant waves. They can also be caused by the impact of volcanic eruptions on the ocean floor and the fall of meteors.
143. What are the driving or causative forces of exogenic movements (Exogenic forces)?
     The driving forces include:
     * Slope formed on the Earth's surface.
     * Gravity.
     * The kinetic energy of running water, glaciers, wind and waves, and the action of groundwater.
     * Temperature changes, molecular stresses, bio-chemical actions.
144. What are exogenic movements?
     These movements involve processes that operate on the surface of the Earth, such as weathering, erosion, transportation, deposition, and mass wasting.
145. Define Weathering.
     Weathering is the processes that bring about chemical and mechanical changes in rocks, causing them to be mechanically disintegrated or chemically decomposed.
146. What are the types of Weathering?
     Physical Weathering, Chemical Weathering, and Biological Weathering.
147. List the human activities that contribute to the weathering of rocks.
     Mining and Quarrying.
148. How can weathering be useful to us?
     1. Weathering leads to the formation of soil.
     2. It helps to separate minerals from rocks.
     3. It causes mineral enrichment.
     4. It makes mining easier.
149. What is Mass Wasting?
     Mass wasting refers to the movement or fall of rock fragments or earth materials down a slope under the direct influence of gravitational pull.
150. What is 'Urulpottal' (debris flow/landslide)?
     * Debris flow: The sudden movement of rock debris and soil mixed with water down a steep slope under the direct influence of gravity.
     * Landslide: The downward sliding of a portion of a mountain slope under the force of gravity.
     * Urulpottal is the local name for landslides or debris flows in the hilly regions of Kerala, often triggered by intense rainfall.
151. What are the possible factors that can lead to 'Urulpottal' in an area?
     The slope of the land, the depth and structure of the soil, land use, and the distribution of streams.
152. What are the main triggering factors for debris flow?
     Heavy rainfall, cloudbursts, and earthquakes.
153. What are the triggering factors related to human activities for debris flow?
     Unscientific rock quarrying during the monsoon season and unscientific construction activities.
154. What is Soil Piping or Tunnel Erosion?
     This phenomenon occurs when water movement washes away the clay-silt mixture from the clayey subsoil beneath a laterite cap, creating underground channels or pipes.

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Chapter 7: Indian Economy: Growth and Transformation

Economic Growth and Development

155. What are the objectives of individuals, institutions, and government engaging in economic activities?
     The objectives include: increase in infrastructure, better employment opportunities, increased income and purchasing power, and higher quality of life.
156. How does economic growth benefit the economy?
     When economic growth occurs, a country's capacity to meet the needs of its people increases through changes in production, employment, and income.
157. Define Economic Growth Rate.
     The economic growth rate is the rate of increase in GDP in the current year compared to the previous year, measured in percentage.
158. Which year (2012-13 to 2024-25) achieved the highest growth rate in GDP?
     2021-22 (9.7%).
159. In which year (2012-13 to 2024-25) did the lowest economic growth rate occur?
     2020-21 (-5.8%).
160. What are the shortcomings of Per Capita Income (PCI) as an indicator of economic growth?
     1. It is only an average income.
     2. Information about the distribution and inequality of wealth is not reflected in the income index.
     3. The limitations of calculating national income also affect per capita income.
     4. Factors that enhance the quality of life are not included in the scope of the PCI index.
161. What are the conditions needed alongside economic growth to improve the quality of life (Economic Development)?
     Educational facilities, nutrient availability, and transportation facilities.
162. What is the definition of Economic Development by Todaro & Smith?
     Economic development is the process of improving the standard of living and economic well-being of people through growth in income, education, and infrastructure.

Development Indices

163. What are the factors used to calculate the Human Development Index (HDI)?
     1. Life expectancy (Long and healthy life).
     2. Literacy and gross school enrollment rate (Knowledge).
     3. Per capita income (A decent standard of living).
164. Based on HDI value (1990-2023), during which periods was India in Low Human Development and Medium Human Development?
     * Low Human Development (below 0.550): 1990, 1995, 2000, 2005 (0.547).
     * Medium Human Development (0.550 - 0.699): 2010, 2015, 2020, 2023.
165. What areas must India improve to achieve High and Very High Human Development (based on HDI value)?
     India needs to improve in the areas used to calculate HDI: life expectancy (health), literacy/school enrollment (education), and per capita income (standard of living).
166. What are the three indices used to prepare the Physical Quality of Life Index (PQLI)?
     1. Basic Literacy Index (BLI).
     2. Infant Mortality Index (IMI).
     3. Life Expectancy Index (LEI).
167. What is the major drawback of the PQLI?
     The PQLI does not consider the respondent's annual income while preparing the index.
168. What is the purpose of the Sustainable Development Goals Index (SDGI)?
     The SDGI assesses the efforts taken by countries to achieve the Sustainable Development Goals.
169. List the three categories of goals assessed by the SDG India Index.
     Economic goals, Social goals, and Environmental goals.
170. What are the key features of the Kerala model of development?
     High literacy rates, low infant mortality rates, and improved life expectancy. This was achieved through land reforms, universal public health and education systems, public distribution systems, social security schemes, and public participation.

Planning and Reforms

171. What are the objectives of Economic Planning in India?
     1. Growth: An increase in production.
     2. Modernization: Use of new technologies and ideas, and modernizing social perspectives.
     3. Self-reliance: Minimize foreign dependence on economic activity.
     4. Equity: Ensuring equality by providing basic needs to all and enabling fair distribution of wealth.
172. List the important factors that led India to the Economic Reforms of 1991.
     1. Economic crisis in India caused by a high fiscal deficit and a decline in foreign exchange reserves.
     2. Inefficiency of the public sector.
     3. Changes in the world market and arguments in favour of the free market.
     4. Economic crisis caused by the 1990 Gulf War.
     5. Economic growth in East Asian countries through industrialization and liberalization.
     6. The conditions imposed by the World Bank and IMF.
173. What were the main goals of the Economic Reforms (LPG)?
     1. To liberalize the Indian economy and open it to the world economy.
     2. To deregulate the private sector.
     3. To reduce the government regulation in various sectors.
     4. To remove the trade restrictions with foreign countries.
174. How do economic activities in the Knowledge Economy lead to economic growth?
     They lead to economic growth through skill development, human resource utilization, and job creation.

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Chapter 8: Towards Sustainability

Resources and Classification

175. What do we mean by resources?
     A resource is anything that satisfies human needs and occurs naturally, is technologically feasible, and culturally acceptable.
176. Why are resources not simply free gifts of nature?
     Resources are also formed as a result of human efforts; humans convert the materials available in the environment into resources using their abilities, skills, and technology.
177. What are the two types of resources based on origin?
     1. Biotic Resources: Anything that is part of the biosphere and can be used by humans (e.g., Humans, plants, animals).
     2. Abiotic Resources: Resources that are made of non-living matter (e.g., Minerals, water, rocks).
178. What is the classification of resources based on renewability?
     1. Renewable Resources: Resources that are continuously produced or replenished in nature through physical or chemical processes, often reusable and considered sustainable. (Examples: Sunlight, Wind).
     2. Non-renewable Resources: Resources that have formed over millions of years and whose reserves decrease with use (e.g., Minerals, fossil fuels).
179. Classify resources based on ownership.
     1. Personal Resources: Owned by an individual (e.g., House, Yard).
     2. Community Resources: Accessible to all members of the society (e.g., Public play ground, Parks).
     3. National Resources: Owned by the nation (e.g., Mineral deposit, forest, ocean up to 12 nautical miles).
     4. International Resources: Owned by international agencies (e.g., Marine resources beyond 200 nautical miles).
180. What is the classification of resources based on the state of development?
     1. Potential Resources: Resources found in a region but not yet fully utilized (e.g., wind/solar energy potential in Rajasthan/Gujarat).
     2. Developed Resources: Resources whose quantity and quality have been surveyed, assessed, and adequate technology has been developed to utilize them efficiently.
181. Are all the resources on Earth accessible to us?
     No. Due to limitations in technology or the lack of appropriate technological advancement, many things on Earth cannot yet be developed into resources.
182. Define Stocks and Reserves in the context of resources.
     * Stocks: Materials that can meet human needs but for which humans do not have the appropriate technology to utilize (e.g., Hydrogen as an energy source).
     * Reserves: Resources that can be exploited with the help of existing technology, but whose use has not yet begun and may be utilized later to meet future needs.

Minerals and Energy

183. What are Minerals?
     Minerals are naturally occurring organic or inorganic substances with definite chemical and physical properties.
184. What are Ores?
     Ores are Earth materials from which one or more metals can be extracted profitably.
185. What is the main ore of the metal Aluminium?
     Bauxite.
186. What are Energy Resources?
     Any substance that can produce heat, move objects, or generate electricity is called an energy source.
187. When do energy sources become resources?
     When humans convert solar rays into energy and store it (e.g., in photovoltaic cells).
188. What are the characteristics of Conventional (Non-Renewable) and Non-Conventional (Renewable) Energy Resources?

Conventional Resources	Non-Conventional Resources
Get depleted and exhausted with use.	Available in plenty.
Cause pollution.	Eco-friendly.
Very expensive to maintain, extract, and transport.	Usually pollution-free.

189. List the major fossil fuels.
     Coal, petroleum, and natural gas.
190. What is the primary use of iron ore mined worldwide?
     About 98% of the iron ore mined worldwide is used to produce steel.

Sustainable Development

191. What is Sustainable Development?
     Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.
192. What are the necessary steps for resource conservation (leading to sustainable development)?
     It is essential to maintain a balance between resource consumption and development. This requires:
     1. Utilizing natural resources without harming the ecosystem or affecting the global climate.
     2. Developing renewable energy sources (solar, wind, hydroelectricity, geothermal).
     3. Reducing the use of fossil fuels.
193. What significant contribution did the Brundtland Commission Report (1987) make?
     The Brundtland Report (Our Common Future) was the first to propose the concept of sustainable development.