ICSE Class 10 Geography Board Exam Question Paper 2017 with Solutions

Part-I [30 Marks]
(Attempt ALL Questions from this part)

Question 1.
Study the extract of the Survey of India Map sheet No. 45D/10 and answer the following questions:

(a) Give the six figure grid reference for: [2 Marks]
1. The highest point in this map extract.
2. Surveyed tree north of Rampura Khera.

Answer:
1. 088065
2. 072073

Teacher's Note:
a) Six-figure grid references consist of three figures for the easting followed by three figures for the northing.
b) The first two figures of each part represent the main grid square, and the third figure represents tenths within the square.
c) Ensure careful estimation of tenths for accurate six-figure readings.

(b) On which bank of Sukli Nadi lies: [2 Marks]
1. Butri
2. Padrugarh

Answer:
1. North - West
2. North - East

Teacher's Note:
a) River bank direction is determined by facing downstream.
b) Trace the flow of Sukli Nadi to ascertain the correct bank relative to the settlement locations.
c) Compass directions must be precise as per standard topographical map conventions.

(c) Differentiate between the drainage pattern shown in grid square: [2 Marks]
1. 0704
2. 0705

Answer:
Grid 0704 has Trellis pattern whereas 0705 has radial drainage pattern.

Teacher's Note:
a) A trellis drainage pattern features primary tributaries joining main streams at right angles.
b) A radial drainage pattern features streams radiating outwards from a central high point or dome.
c) Identification of drainage patterns is a key map-reading skill tested frequently in board examinations.

(d) The region in this map extract receives seasonal rainfall. Give two reasons for your answer. [2 Marks]

Answer:
1. River, wells and tanks are dry.
2. Vegetation - fairly dense scrub.

Teacher'sNote:
a) Dry tanks and seasonal streams indicated by blue broken lines show lack of perennial water sources.
b) Scrub vegetation is typically found in semi-arid regions with seasonal or scanty rainfall.
c) Both features are standard indicators used to deduce climatic conditions from topographical sheets.

(e) Calculate the distance in km between settlement Bhatana and Makawal along the cart track. [2 Marks]

Answer:
Indirect distance = 12 cm
1 cm on the map represents = 0.5 km (500 metres)
12 cm on the map represent = 12 \times 0.5 = 6 km

Teacher's Note:
a) Standard Survey of India maps have a scale of 1 cm representing 0.5 km (or 1:50,000).
b) Use a piece of string or a strip of paper to measure winding cart tracks accurately.
c) State the final answer clearly in kilometers with proper working steps.

(f) State the Compass direction of the following: [2 Marks]
1. Dattani from Marol.
2. Dhavli from Makawal.

Answer:
1. South - East
2. North - East

Teacher's Note:
a) Direction is measured from the reference settlement (from-location) to the target settlement.
b) Use a light pencil line and protractor or compass rose alignment on the map sheet.
c) Intercardinal directions like North-East and South-East must be written clearly.

(g) 1. Mention a social activity of people living in Marol. [2 Marks]
2. What is the main occupation of the people living in this region?

Answer:
1. Monthly Fair
2. Agriculture - Yellow wash

Teacher's Note:
a) Social activities such as fairs are usually indicated by text labels like 'Monthly Fair' near settlements.
b) Agricultural land is represented on topographical sheets by yellow wash.
c) Always link conventional symbols directly to human geography inferences.

(h) What do you understand by: [2 Marks]
1. The black broken line in 0807
2. The vertical black line close to Easting 10

Answer:
1. Disappearing drainage
2. Longitude line 35°

Teacher's Note:
a) Black broken lines across river beds indicate streams that disappear in sandy or dry tracts.
b) Numbered grid lines near margins represent latitude and longitude values.
c) Technical cartographic terms must be memorised thoroughly.

(i) What is the main source of water supply to Bhatana? Give a reason for your answer. [2 Marks]

Answer:
Tank. Embankments and water channels leading to or from the settlement indicate reliance on stored tank water.

Teacher's Note:
a) Tanks are shown in blue enclosed by black embankments (bunds).
b) Proximity of agricultural fields and settlement to water bodies confirms their role as water sources.
c) Mention both the source type and the map evidence for full credit.

(j) 1. Name one natural feature in the grid square 0905. [2 Marks]
2. Identify one man made feature in the grid square 1003.

Answer:
1. Stream / River / Height
2. Cause way / Post office / Settlement / Cart track

Teacher's Note:
a) Natural features include relief, streams, vegetation, and contours.
b) Man-made features include buildings, roads, tracks, wells, and causeways.
c) Double-check grid square coordinates before writing answers.

Question 2.
On the outline map of India provided:
(a) Draw and name the Tropic of Cancer. [1 Mark]
(b) Label the river Godavari. [1 Mark]
(c) Mark and name the Garo Hills. [1 Mark]
(d) Mark C on the coal fields in Jharia. [1 Mark]
(e) Mark with an arrow and name the NE monsoon over the Bay of Bengal. [1 Mark]
(f) Shade and name the Gulf of Kutch. [1 Mark]
(g) Shade and name the coastal plain that receives rainfall in October-November. [1 Mark]
(h) Mark with a dot and name Delhi. [1 Mark]
(i) Shade a region with Black Cotton Soil. [1 Mark]
(j) Use an arrow to point at a densely populated state in South India. [1 Mark]

Answer:
[Figure: Outline political map of India showing markings for Tropic of Cancer, River Godavari, Garo Hills, Jharia coal fields, NE Monsoon arrow over Bay of Bengal, Gulf of Kutch, Tamil Nadu Coastal Plain, Delhi, Black Cotton Soil region, and a densely populated South Indian state such as Kerala or Tamil Nadu.]

Teacher's Note:
a) Map work requires neat and precise markings with clear labels written parallel to the latitude where possible.
b) Use arrows to point to exact locations if space on the map is congested.
c) Practise outline maps of India regularly to score full marks in Part I map questions.

Part II [50 Marks]
Attempt any five questions from this part

Question 3.
(a) Mention the four seasons that prevail in India stating the months for each. [2 Marks]

Answer:
1. The cold weather season starts in November and continues till March.
2. The hot weather season starts in March and ends in May.
3. The season of the advancing monsoon starts in June and lasts until September.
4. The season of the retreating monsoon starts in October and November.

Teacher's Note:
a) India has a tropical monsoon climate characterised by distinct seasonal changes.
b) Mention both the season name and the corresponding months correctly.
c) Sequence the seasons chronologically starting from the cold weather season.

(b) State the agricultural benefits derived from : [2 Marks]
1. The Westerly Depressions in Punjab.
2. The Kalbaisakhi in Assam.

Answer:
1. These depressions are very useful for wheat, a major rabi crop of Punjab.
2. These local winds are accompanied by thunderstorms and bring rainfall, which is beneficial for jute and rice cultivation.

Teacher's Note:
a) Westerly depressions (temperate cyclones) originate in the Mediterranean region and bring winter rain to North-West India.
b) Kalbaisakhi means 'calamity of the month of Baisakh' and brings pre-monsoon showers to eastern India.
c) Always link the weather phenomenon to the specific crop it benefits.

(c) Give a reason for each of the following: [3 Marks]
1. Kolkata receives heavier rain than Lucknow.
2. The Summer Monsoon winds blow over the Arabian Sea from the Southwest.
3. Thar is a desert.

Answer:
1. Kolkata is located closer to the Bay of Bengal coast whereas Lucknow is further inland, so moisture content in monsoon winds decreases as they move further from the sea.
2. The South-East Trades are attracted towards the low-pressure trough over the Indian landmass during summer; upon crossing the Equator, they are deflected to the right by the Coriolis effect and blow into India as the South-West Monsoon.
3. Thar is a desert because it receives scanty rainfall; the Aravalli range lies parallel to the direction of the incoming monsoon winds, offering no barrier to force condensation and precipitation.

Teacher's Note:
a) Maritime influence decreases with distance from the coast.
b) Ferrel's Law and Coriolis force explain the deflection of trade winds into monsoon winds.
c) Mountain orientation relative to rain-bearing winds is crucial in determining rain shadow deserts.

(d) Study the climatic data given below and answer the questions that follow: [3 Marks]

1. What is the annual range of temperature of the station?
2. What is the total annual rainfall experienced by the station?
3. Why would it be correct to presume that the station lies in the interior and not on the coast?

Answer:
1. Highest temperature = 36.2 °C, Lowest temperature = 12.0 °C. Annual range = 36.2 °C - 12.0 °C = 24.2 °C.
2. Total annual rainfall = 1.5 + 0.1 + 0.0 + 1.4 + 1.1 + 21.0 + 25.3 + 27.2 + 24.0 + 9.4 + 1.5 + 0.4 = 112.9 cm.
3. The annual temperature range is very high (24.2 °C), which indicates a continental location lacking the moderating maritime influence of the sea.

Teacher's Note:
a) Annual range of temperature is calculated as maximum temperature of the warmest month minus minimum temperature of the coldest month.
b) Total annual rainfall is the sum of monthly rainfall figures.
c) Coastal stations experience an equable climate with a low annual temperature range.

Question 4.
(a) Mention two differences between Alluvial Soil and Black Cotton Soil. [2 Marks]

Answer:

Teacher's Note:
a) Always present soil comparisons in a tabular format for clarity.
b) Highlight formation, mineral content, and agricultural utility.
c) Ensure distinct and scientifically accurate points of difference.

(b) Name an area in India in which each of the following processes take place: [2 Marks]
1. Sheet erosion
2. Gully erosion

Answer:
1. Gentle slopes of the Shiwaliks / Hilly areas of Uttarakhand and Himachal Pradesh
2. Chambal ravines in Madhya Pradesh / Rajasthan

Teacher's Note:
a) Sheet erosion occurs when topsoil is removed evenly by surface water flow over gentle slopes.
b) Gully erosion creates deep ravines and badlands, commonly seen in the Chambal river basin.
c) Mention specific geographical regions or states for full credit.

(c) What is soil conservation? State a method of soil conservation in the: [3 Marks]
1. Arid and Semi-Arid region.
2. River valleys prone to flood.

Answer:
Soil conservation is the protection, management, and restoration of soil against erosion and depletion caused by natural and human factors.
1. Arid and Semi-Arid region: Afforestation and shelterbelts / restricting overgrazing.
2. River valleys prone to flood: Constructing dams and embankments / check dams.

Teacher's Note:
a) Define soil conservation clearly before answering sub-parts.
b) Shelterbelts prevent wind erosion in desert and semi-arid areas.
c) Dams regulate water flow and prevent flooding in river valleys.

(d) Name the soil which: [3 Marks]
1. Is good for cultivation of sugarcane.
2. Is acidic in nature.
3. Occurs ex-situ.

Answer:
1. Alluvial soil / Black soil
2. Laterite soil
3. Alluvial soil

Teacher's Note:
a) Sugarcane thrives in fertile alluvial and black soils.
b) Laterite soil is acidic due to leaching of bases caused by heavy rainfall.
c) Ex-situ soils (transported soils) like alluvial soil are deposited away from their parent rock origin.

Question 5.
(a) How do trees in the Tropical desert forests adapt themselves to the dry climate? [2 Marks]

Answer:
1. Trees have long roots that penetrate deep into the ground to tap underground moisture.
2. Leaves are modified into thorns or are small and waxy to reduce transpiration loss.

Teacher's Note:
a) Xerophytic adaptations are crucial for survival in arid environments.
b) Mention root modifications and leaf reductions as key points.
c) Succulent stems and thick barks are also valid adaptation features.

(b) Name the tree as per its characteristics given below: [2 Marks]
1. The wood is hard and suitable for ship building.
2. The stilt roots are underwater during high tide.

Answer:
1. Teak / Rosewood
2. Sundari / Mangrove tree

Teacher's Note:
a) Teak and rosewood produce durable hardwood used in naval construction and furniture.
b) Mangrove (Sundari) trees possess stilt/breathing roots adapted to tidal saline swamps.
c) Match specific botanical characteristics to correct tree species.

(c) Explain why the forest cover in India is shrinking. [3 Marks]

Answer:
1. Overutilization of forest resources to meet the demands of a growing population for timber, fuel, and fodder.
2. Expansion of agricultural land through massive deforestation to produce more food crops.
3. Industrialization, urban expansion, and infrastructure projects like road and railway construction.

Teacher's Note:
a) Deforestation is driven primarily by anthropogenic activities.
b) Cite population pressure, agricultural conversion, and industrial development.
c) Structured points ensure maximum marks in descriptive geography questions.

(d) Name the natural vegetation found in the following regions: [3 Marks]
1. The western slopes of the Western Ghats.
2. The Nilgiris.
3. Western Rajasthan.

Answer:
1. Tropical Evergreen Forests
2. Montane / Mountain Forests (Sholas)
3. Tropical Desert / Thorn Forests

Teacher's Note:
a) Western Ghats receive heavy annual rainfall supporting evergreen vegetation.
b) Nilgiris feature montane forests known locally as Sholas mixed with grasslands.
c) Western Rajasthan experiences arid conditions supporting thorny scrub and desert vegetation.

Question 6.
(a) Give a reason for the significance of irrigation in : [2 Marks]
1. Punjab.
2. Rajasthan.

Answer:
1. Punjab: Rainfall is seasonal and variable; intensive agriculture of wheat and rice requires a regulated and assured water supply.
2. Rajasthan: It is an arid region with scanty and erratic rainfall, making irrigation essential for crop cultivation and survival.

Teacher's Note:
a) Punjab relies on canal and tubewell irrigation for multiple cropping.
b) Rajasthan depends on irrigation projects like the Indira Gandhi Canal to overcome desert aridity.
c) Connect irrigation necessity directly to rainfall characteristics and agricultural intensity.

(b) Name a state where: [2 Marks]
1. Tube wells are common.
2. Tank irrigation is popular.

Answer:
1. Uttar Pradesh / Punjab
2. Tamil Nadu / Andhra Pradesh

Teacher's Note:
a) Tubewells flourish in areas with soft alluvial strata and rich groundwater aquifers.
b) Tank irrigation is prominent in peninsular states due to rocky terrain and natural depressions.
c) Give prominent states known for each irrigation method.

(c) Give one geographical reason for each of the following : [3 Marks]
1. Sprinkler irrigation is practiced in arid and semi-arid regions.
2. A tube well should be installed in a fertile and productive region.
3. Canal irrigation is more suitable in the Northern Plains.

Answer:
1. Sprinkler irrigation minimises water loss due to evaporation and percolation in water-scarce areas.
2. High agricultural productivity ensures that farmers can recover the high installation and operational costs of a tubewell.
3. The Northern Plains feature flat terrain, soft alluvial soil which makes canal digging easy, and perennial rivers originating from the Himalayas.

Teacher's Note:
a) Water conservation is vital in arid zones.
b) Economic viability governs the placement of capital-intensive irrigation structures.
c) Physiography and perennial water supply favour canal networks in northern plains.

(d) Study the diagram below and answer the questions that follow: [3 Marks]

[Figure: Diagram showing rainwater harvesting system with rooftop collection pipes, a storage tank, and a recharge pit connected to a tubewell.]

1. Name the activity shown in the diagram.
2. Give two objectives of the activity named in (d) (1).

Answer:
1. Rainwater harvesting.
2. (i) To recharge groundwater aquifers and raise declining water tables.
(ii) To supplement domestic water demands during periods of water scarcity.

Teacher's Note:
a) Rainwater harvesting is an eco-friendly method for sustainable water management.
b) Recharging groundwater helps combat over-extraction.
c) Both ecological and domestic objectives should be stated clearly.

Question 7.
(a) Give the names of four important types of iron ore found in India. [2 Marks]

Answer:
Magnetite, Hematite, Limonite, and Siderite.

Teacher's Note:
a) Hematite and magnetite are superior quality iron ores found extensively in India.
b) List all four types in decreasing order of iron content for completeness.
c) Spelling of ore names must be accurate.

(b) Name the following: [2 Marks]
1. An offshore oil field in the Gulf of Cambay.
2. An oil refinery in Bihar.

Answer:
1. Aliabet / Ankleshwar (or Mumbai High in Arabian Sea)
2. Barauni

Teacher's Note:
a) Aliabet is located in the Gulf of Cambay (Khambhat).
b) Barauni is a prominent public sector refinery in Bihar operated by IOC.
c) Precise geographical naming is essential for mineral and industry questions.

(c)
1. Name the state that produces the largest amount of limestone. [3 Marks]
2. State two uses of limestone.

Answer:
1. Madhya Pradesh.
2. (i) It is the primary raw material used in the cement industry.
(ii) It is used as a flux in blast furnaces for smelting iron ore.

Teacher's Note:
a) Madhya Pradesh is a leading producer of limestone in India.
b) Cement manufacturing consumes the largest share of total limestone production.
c) Industrial uses must be stated concisely.

(d) State an important industrial use of : [3 Marks]
1. Manganese
2. Coal
3. Aluminium

Answer:
1. Manganese: Used in manufacturing iron and steel alloys (ferro-manganese) to impart hardness and toughness.
2. Coal: Used as a source of thermal power and as a reducing agent in metallurgical industries.
3. Aluminium: Used in the manufacture of aircraft parts, electrical cables, and domestic utensils due to its lightweight and high electrical conductivity.

Teacher's Note:
a) Manganese is indispensable for steel making.
b) Coal serves both as fuel and chemical feedstock.
c) Aluminium's properties dictate its diverse engineering applications.

Question 8.
(a) What is Mixed farming? Mention any one benefit of Mixed farming. [2 Marks]

Answer:
Mixed farming is an agricultural system where crop cultivation is combined with livestock rearing on the same farm.
Benefit: It provides farmers with a secondary source of income and ensures year-round employment.

Teacher's Note:
a) Mixed farming diversifies farm output and reduces economic risk.
b) Animal dung serves as natural manure for crops.
c) State both the definition and a distinct benefit clearly.

(b) Give the Geographical requirements for the cultivation of Sugarcane. [2 Marks]

Answer:
Temperature: Hot and humid climate ranging between 21 °C and 27 °C.
Rainfall: 100 cm to 150 cm of annual rainfall, supplemented by irrigation.
Soil: Deep, rich alluvial or well-drained loamy soil.

Teacher's Note:
a) Sugarcane is a long-duration tropical crop requiring high moisture and warmth.
b) Mention temperature, rainfall, and soil requirements separately.
c) Waterlogging is harmful, so well-drained soils are essential.

(c) Explain the following terms and name the crop with which each is associated: [3 Marks]
1. Retting
2. Ratooning
3. Ginning

Answer:
1. Retting (Jute): A microbiological process where harvested jute stalks are submerged in stagnant water to rot the outer bark, making it easier to strip the fibre.
2. Ratooning (Sugarcane): A method of cultivation where the main crop is harvested by cutting the cane close to the ground, allowing the stubble to sprout and produce a second ratoon crop.
3. Ginning (Cotton): The process of separating cotton fibres from the cotton seeds before spinning.

Teacher's Note:
a) Each term represents a specific post-harvest or cultivation processing technique.
b) Correctly associating each term with its crop is vital for full marks.
c) Definitions should be scientifically precise.

(d) Give geographical reasons for the following: [3 Marks]
1. Regular pruning is essential for tea bushes.
2. Coffee beans are roasted.
3. Millets are known as dry crops.

Answer:
1. Pruning encourages horizontal vegetative growth and stimulates the sprouting of tender new leaves.
2. Roasting develops the characteristic aroma, deep brown colour, and rich flavour of coffee.
3. Millets require very little water (30 cm to 50 cm rainfall) and can withstand prolonged dry spells.

Teacher's Note:
a) Pruning maintains bush height and increases tea leaf yield.
b) Roasting transforms green coffee beans chemically.
c) Drought-resistant millets are staple food crops in arid regions.

Question 9.
(a) Differentiate between Mineral-based Industry and Agro-based industry giving one example for each. [2 Marks]

Answer:

Teacher's Note:
a) Classification of industries depends upon the source of raw materials.
b) Give one clear example for each category.
c) Use a tabular format for clear comparison.

(b) 'Though Uttar Pradesh has the largest number of sugar mills yet Maharashtra is the largest producer of sugar'. Give any two reasons to justify the statement. [2 Marks]

Answer:
1. Tropical climate in Maharashtra yields higher tonnage of sugarcane per hectare and higher sucrose content than northern India.
2. The crushing season in Maharashtra is longer (7 to 8 months) compared to Uttar Pradesh (4 months) due to maritime influence.

Teacher's Note:
a) High sucrose content and longer crushing season give peninsular India an advantage.
b) Modern cooperative sugar mills in Maharashtra also contribute to higher efficiency.
c) Both points are standard expected answers in board marking schemes.

(c) Give the geographic term for each of the following: [3 Marks]
1. Non-mulberry silk produced in Madhya Pradesh.
2. Rejected cane after crushing.
3. The rearing of silk worms to obtain silk.

Answer:
1. Tussar Silk
2. Bagasse
3. Sericulture

Teacher's Note:
a) Tussar is a wild variety of silk.
b) Bagasse is widely used as fuel in sugar mills and for paper manufacturing.
c) Sericulture is the agro-based practice of rearing silkworms.

(d) With reference to the cotton textile industry answer the following questions: [3 Marks]
1. Give two reasons why Mumbai is an important cotton textile industry.
2. Mention two more important centres of cotton textile industry in India.

Answer:
1. (i) Proximity to black cotton soil region which produces abundant raw cotton.
(ii) Humid climate which prevents snapping of cotton yarn during spinning.
2. Ahmedabad and Coimbatore (or Surat / Madurai).

Teacher's Note:
a) Mumbai's early leadership in textiles was aided by port facilities and hydroelectric power.
b) Ahmedabad is known as the Manchester of India.
c) List major traditional textile centres.

Question 10.
(a) 'The Iron and Steel industry constitutes the backbone of modern industrial economy.' Give two reasons to justify the statement. [2 Marks]

Answer:
1. It provides raw materials and machinery for all other heavy and light industries such as automobiles, transport, and construction.
2. It generates vast employment opportunities and stimulates infrastructural development across the country.

Teacher's Note:
a) Iron and steel is classified as a basic or key industry.
b) Every manufacturing sector depends directly or indirectly on steel.
c) State the foundational role of steel in industrialization.

(b) 1. Name an Iron and Steel Industry set up in Orissa with the help of a famous German firm. [2 Marks]
2. From where does the industry named in b (1) get its iron ore and manganese?

Answer:
1. Rourkela Steel Plant.
2. Iron ore is obtained from Sundargarh (Bonaigarh) / Mayurbhanj, and manganese from Barajamda.

Teacher's Note:
a) Rourkela was established in collaboration with German firms (West Germany).
b) Proximity to mineral belts in Odisha ensures steady raw material supply.
c) Name both the plant and its specific mineral sources.

(c) Name a manufacturing centre for each of the following industries : [3 Marks]
• Aircraft
• HMT
• Railway coaches

Answer:
Aircraft: Bengaluru (or Koraput)
HMT: Bengaluru (or Pinjore / Hyderabad)
Railway coaches: Perambur (or Kapurthala / Rae Bareli)

Teacher's Note:
a) Bengaluru is the hub of aerospace and machine tool industries in India.
b) Integral Coach Factory is located at Perambur.
c) Provide well-known industrial manufacturing centres.

(d) Name two products each of the following industries: [3 Marks]
1. Petrochemical industry
2. Heavy engineering industry
3. Electronic industry

Answer:
1. Synthetic fibres / Plastics (polythene)
2. Heavy machinery / Industrial boilers (or locomotives)
3. Computers / Televisions (or semiconductors)

Teacher's Note:
a) Petrochemicals yield diverse synthetic materials derived from petroleum.
b) Heavy engineering involves large-scale industrial machinery.
c) Electronics products range from consumer appliances to IT hardware.

Question 11.
(a) Mention two reasons why more people use railways rather than airways. [2 Marks]

Answer:
1. Railways are much cheaper and affordable for the general public compared to expensive air travel.
2. Railways have a higher passenger and freight carrying capacity, making them suitable for long-distance bulky transport.

Teacher's Note:
a) Cost-effectiveness is the primary reason for widespread railway usage.
b) Railways connect remote interior areas better than airports.
c) Contrast cost and capacity advantages clearly.

(b) Why is inland water transport declining in its importance? Give two reasons for your answer. [2 Marks]

Answer:
1. Diversion of river water for irrigation and hydro projects has reduced water depth and navigability in rivers.
2. Competition from faster and more flexible road and rail transport networks.

Teacher's Note:
a) Seasonal fluctuations in water volume hinder year-round inland navigation.
b) Road transport offers door-to-door connectivity which waterways lack.
c) State two distinct geographical and economic reasons.

(c) What do you mean by the following: [3 Marks]
1. Sewage
2. Eutrophication
3. Recycling

Answer:
1. Sewage: Wastewater containing human excreta, household waste, and industrial effluents discharged from residential and commercial areas.
2. Eutrophication: The process where water bodies receive excess nutrients (like nitrates and phosphates), leading to algal blooms and oxygen depletion.
3. Recycling: The process of collecting waste materials, processing them, and converting them into new reusable products.

Teacher's Note:
a) Define environmental terms concisely and accurately.
b) Eutrophication causes aquatic ecological degradation.
c) Recycling promotes sustainable waste management.

(d) 'Methane is an air pollutant that causes Greenhouse effect.' Name three sources of this gas. [3 Marks]

Answer:
1. Paddy cultivation (flooded rice fields)
2. Livestock enteric fermentation (digestive processes of cattle)
3. Decomposition of organic waste in landfills (or coal mining)

Teacher's Note:
a) Methane is a potent greenhouse gas contributing to global warming.
b) Agricultural activities are major anthropogenic sources of atmospheric methane.
c) List three distinct sources correctly.