The Hydrological Cycle

Introduction and Definition

By the end of the lesson, the learner should be able to:
Define hydrological cycle as endless circulation of water from oceans to atmosphere to land
Explain role of sun as energy source driving the cycle
Identify components: inputs, outputs, transfers and storages
Describe hydrological cycle as complete balanced system

Q/A session using questions about water disappearance and return; Discussion of water circulation from sky to land to ocean; Exposition of hydrological cycle definition; Analysis of Figure 5.1 showing complete cycle; Study of system components and energy source

Figure 5.1 hydrological cycle diagram, Water circulation demonstrations, System component charts

Secondary Geography Form 3 Student's Book, Pages 63

The Hydrological Cycle

Input and Output Processes

By the end of the lesson, the learner should be able to:
Identify precipitation as main input in various forms: dew, rainfall, mist, snow, fog
Explain evaporation as physical process of moisture loss to atmosphere
Describe transpiration as biological process of water loss from plants
Analyze factors affecting evaporation and transpiration rates

Exposition of precipitation forms and conditions for occurrence; Detailed discussion of evaporation process and factors: humidity, temperature, wind, sunshine hours, water characteristics; Analysis of transpiration through stomata and lenticles; Study of evapotranspiration as combined process

Precipitation examples, Evaporation demonstration materials, Plant samples showing stomata, Factor analysis charts

Secondary Geography Form 3 Student's Book, Pages 63-65

The Hydrological Cycle

Input and Output Processes

By the end of the lesson, the learner should be able to:
Identify precipitation as main input in various forms: dew, rainfall, mist, snow, fog
Explain evaporation as physical process of moisture loss to atmosphere
Describe transpiration as biological process of water loss from plants
Analyze factors affecting evaporation and transpiration rates

Exposition of precipitation forms and conditions for occurrence; Detailed discussion of evaporation process and factors: humidity, temperature, wind, sunshine hours, water characteristics; Analysis of transpiration through stomata and lenticles; Study of evapotranspiration as combined process

Precipitation examples, Evaporation demonstration materials, Plant samples showing stomata, Factor analysis charts

Secondary Geography Form 3 Student's Book, Pages 63-65

The Hydrological Cycle

Internal Transfer Processes

By the end of the lesson, the learner should be able to:
Explain interception as first contact of rain with vegetation
Describe runoff as overland flow when ground cannot absorb water
Define infiltration as vertical water absorption through soil pores
Distinguish percolation as movement through underlying rock layers

Study of interception storage and through fall processes; Analysis of surface storage and ground saturation; Discussion of runoff conditions and overland flow; Examination of infiltration capacity and factors; Study of percolation leading to underground water storage

Vegetation interception examples, Runoff demonstration materials, Soil infiltration samples, Percolation process diagrams

Secondary Geography Form 3 Student's Book, Pages 65-66

The Hydrological Cycle

Storage Processes and Significance

By the end of the lesson, the learner should be able to:
Identify surface water storage: seas, oceans, lakes, swamps
Describe ground water storage above impermeable rocks creating water table
Explain cryosphere as water stored in ice-covered regions
Analyze significance of hydrological cycle in ecological balance and distribution

Discussion of surface water storage through rivers to seas and lakes; Analysis of ground water formation through percolation and infiltration; Study of cryosphere as fresh water store; Examination of cycle significance: ecological balance, rainfall formation, atmospheric unity, oxygen-carbon cycle, water distribution

Water storage examples, Ground water table diagrams, Ice storage examples, Significance analysis charts

Secondary Geography Form 3 Student's Book, Pages 66-67

LAKES

Definition of a Lake

By the end of the lesson, the learner should be able to:
Define a lake as a large mass of water occupying a depression. Distinguish between fresh water and salt water lakes. Explain reasons for lake salinity including lack of outlets, high evaporation, and underground salt sources.

Q/A to review hydrological cycle and water bodies. Discussion of lake characteristics with examples from Kenya. Listing fresh vs salt water lakes on chalkboard.

Chalkboard, textbooks, wall map of Kenya

KLB Secondary Geography Form 3, Pages 99-100

LAKES

Lakes Formed by Tectonic Movements - Rift Valley Lakes
Lakes Formed by Tectonic Movements - Downwarped Lakes

By the end of the lesson, the learner should be able to:
Describe formation of faulted/rift valley lakes through earth movements. Explain characteristics: narrow, steep-sided, alkaline, long, deep. Give examples from Kenya (Turkana, Baringo, Nakuru, Naivasha) and other African rift valleys.

Drawing rift valley formation diagrams on chalkboard. Discussion of Kenyan Rift Valley lakes with their characteristics. Students copy diagrams in exercise books.

Chalkboard, chalk, exercise books, wall map of East Africa
Chalkboard, chalk, exercise books, atlas

KLB Secondary Geography Form 3, Pages 100-102

LAKES

Lakes Formed by Volcanic Activity

By the end of the lesson, the learner should be able to:
Describe crater lake formation in volcanic craters. Explain lava dammed lake formation when lava blocks river courses. Give examples: crater lakes (Simbi, Paradise, Chala) and lava dammed lakes (Bunyonyi, Kivu, Tana).

Drawing crater lake formation on chalkboard. Discussion of lava dam formation across rivers. Students sketch volcanic lake types in exercise books.

Chalkboard, chalk, exercise books, textbooks

KLB Secondary Geography Form 3, Pages 103-106

LAKES

Lakes Formed by Glaciation
Lakes Formed by River and Wave Deposition

By the end of the lesson, the learner should be able to:
Describe cirque/tarn lake formation through glacial erosion. Explain moraine dammed lakes from glacial debris. Identify ribbon lakes in glacial valleys and kettle lakes from melted ice blocks.

Drawing glacial lake formation processes on chalkboard. Discussion of Mt. Kenya tarns (Teleki, Hidden, Nanyuki). Students copy diagrams and list examples.

Chalkboard, chalk, exercise books, atlas
Basin, clay/soil, water, chalkboard, chalk, exercise books

KLB Secondary Geography Form 3, Pages 106-107

LAKES

Other Lake Types - Wind Erosion, Solution, and Human-made

By the end of the lesson, the learner should be able to:
Describe wind erosion lakes through deflation to water table. Explain solution lakes in limestone areas (sink holes). Identify human-made lakes behind dams (Masinga, Volta, Kariba, Nasser).

Discussion of oasis formation through wind erosion. Explanation of solution processes in limestone using chalk demonstration. Review of major African dams and their lakes.

Pieces of chalk, water container, chalkboard, atlas

KLB Secondary Geography Form 3, Pages 108-109

LAKES

Landslide and Meteorite Lakes
Lake Classification Summary and Regional Examples

By the end of the lesson, the learner should be able to:
Describe temporary lakes from landslide debris blocking rivers. Explain meteorite crater lakes from space impacts. Give examples including Lake Bosumtwi in Ghana.

Discussion of landslide lake formation and temporary nature. Simple demonstration of crater formation using sand and dropping stones. Brief IT integration: internet search for Lake Bosumtwi images if available.

Sand tray, small stones, chalkboard, internet access (if available)
Chalkboard, chalk, exercise books, atlas

KLB Secondary Geography Form 3, Page 109

LAKES

Significance of Lakes - Economic Importance

By the end of the lesson, the learner should be able to:
Explain lakes as sources of fish, water supply, and irrigation. Describe hydroelectric power generation from lakes. Analyze transport and navigation benefits. Discuss mineral extraction (soda ash, salt) from lakes.

Discussion of Lake Victoria fisheries and water supply to cities. Analysis of Owen Falls and Seven Forks power generation. Case study of Lake Magadi salt and soda ash mining using textbook examples.

Chalkboard, chalk, textbooks, exercise books

KLB Secondary Geography Form 3, Pages 109-111

LAKES

Significance of Lakes - Economic Importance

By the end of the lesson, the learner should be able to:
Explain lakes as sources of fish, water supply, and irrigation. Describe hydroelectric power generation from lakes. Analyze transport and navigation benefits. Discuss mineral extraction (soda ash, salt) from lakes.

Discussion of Lake Victoria fisheries and water supply to cities. Analysis of Owen Falls and Seven Forks power generation. Case study of Lake Magadi salt and soda ash mining using textbook examples.

Chalkboard, chalk, textbooks, exercise books

KLB Secondary Geography Form 3, Pages 109-111

LAKES

Significance of Lakes - Social and Environmental Benefits

By the end of the lesson, the learner should be able to:
Describe lakes as tourist attractions and recreational facilities. Explain climate modification effects of large water bodies. Analyze lakes as sources of rivers and building materials.

Discussion of Lake Nakuru National Park and flamingo tourism. Analysis of Lake Victoria's influence on regional climate. Review of recreational activities (boating, sport fishing).

Chalkboard, chalk, textbooks, exercise books

KLB Secondary Geography Form 3, Page 111

LAKES

Negative Effects of Lakes

By the end of the lesson, the learner should be able to:
Identify disease vectors (mosquitoes, snails) around lakes causing malaria and bilharzia. Describe dangerous wildlife habitats (crocodiles, hippos). Explain displacement issues from human-made lakes.

Discussion of health challenges in lake regions. Analysis of human-wildlife conflict around lakes. Case study of resettlement during dam construction projects using textbook examples.

Chalkboard, chalk, textbooks, exercise books

KLB Secondary Geography Form 3, Page 111

Action of Water in Limestone Areas

Surface and Underground Water

By the end of the lesson, the learner should be able to:
Describe processes leading to surface and underground water. Distinguish between surface and underground water types. Identify sources of underground water including rain, snow melt, lake/sea water, and magmatic water. Define water table, aquifer and aquifuge. Explain factors affecting occurrence of underground water.

Q/A to review hydrological cycle processes. Exposition on underground water as "body of water derived from percolation and contained in soil, sub-soil and underlying rocks above impermeable layer". Discussion on surface water types and saltiness from weathering. Detailed explanation of water infiltration through permeable rocks and joints/faults. Discussion on factors affecting occurrence including precipitation, evaporation, porosity, permeability, slope, vegetation, saturation levels, evapotranspiration.

Charts showing water sources, Rock samples, Diagrams of percolation and water table, Transparent containers

KLB Secondary Geography Form 3, Pages 166-170

Action of Water in Limestone Areas

Surface and Underground Water

By the end of the lesson, the learner should be able to:
Describe processes leading to surface and underground water. Distinguish between surface and underground water types. Identify sources of underground water including rain, snow melt, lake/sea water, and magmatic water. Define water table, aquifer and aquifuge. Explain factors affecting occurrence of underground water.

Q/A to review hydrological cycle processes. Exposition on underground water as "body of water derived from percolation and contained in soil, sub-soil and underlying rocks above impermeable layer". Discussion on surface water types and saltiness from weathering. Detailed explanation of water infiltration through permeable rocks and joints/faults. Discussion on factors affecting occurrence including precipitation, evaporation, porosity, permeability, slope, vegetation, saturation levels, evapotranspiration.

Charts showing water sources, Rock samples, Diagrams of percolation and water table, Transparent containers

KLB Secondary Geography Form 3, Pages 166-170

Action of Water in Limestone Areas

Features Resulting from Underground Water

By the end of the lesson, the learner should be able to:
Identify features resulting from underground water: springs, wells, artesian basins and wells. Describe spring formation in well-jointed limestone, at scarp slopes, and spring-lines. Explain well construction and distinguish permanent, intermittent and dry wells. Define artesian basin structure and conditions for artesian well location.

Exposition on springs as "natural outflow of water from rocks" with formation methods in limestone areas. Discussion on bournes as intermittent streams in chalk areas. Explanation of wells as "holes sunk into permeable rock to reach water table" using textbook diagrams. Detailed discussion on artesian basin structure and examples including London Basin, Great Australian Basin, Sahara, Kalahari.

Topographical maps, Geological cross-sections, Textbook diagrams, 3D models, World maps

KLB Secondary Geography Form 3, Pages 170-172

Action of Water in Limestone Areas

Importance of Underground Water

By the end of the lesson, the learner should be able to:
Explain ways underground water is important to humankind and countries. Give specific examples of underground water significance including settlement, irrigation, domestic/industrial supply, geothermal energy, mineral deposits.

Brain storming on underground water uses. Detailed discussion on importance aspects including settlement sites like spring-line settlements, irrigation in dry areas like Sahara oases, domestic/industrial water like Mzima Springs supplying Mombasa, river sources in Kenyan Highlands, geothermal power like Olkaria near Naivasha, mineral deposits like salt at Homa Hills, underground streams keeping lakes fresh like Lake Naivasha.

Photographs of key sites, Maps of Kenya, Case study materials, Charts showing applications

KLB Secondary Geography Form 3, Pages 172-173

Action of Water in Limestone Areas

Action of Water in Limestone Areas and Resultant Features

By the end of the lesson, the learner should be able to:
Define karst as area with limestone, chalk or dolomite. Explain chemical processes forming carbonic acid and calcium bicarbonate. Identify conditions for karst development. Describe surface features: grikes/clints, swallow holes, dolines, uvalas, poljes, gorges. Describe underground features: caves, underground rivers, stalactites, stalagmites, limestone pillars.

Q/A to review limestone characteristics from Form 1. Exposition on karst origin and chemical equations. Discussion on development conditions including jointed rocks, humid climate, deep water table. Progressive explanation of surface features using textbook diagrams and formation table. Exposition on underground features with stalactite/stalagmite formation processes. Examples from various countries including Kenya's Marafa Cave.

Limestone samples, Weak acids, Sequential diagrams, Clay for modeling, Salt solution setup, Cave photographs, Safety equipment

KLB Secondary Geography Form 3, Pages 172-178

Action of Water in Limestone Areas

Significance of Resultant Features

By the end of the lesson, the learner should be able to:
Explain significance of karst landscape features to humankind and countries. Analyze positive and negative impacts of karst features. Evaluate economic importance of limestone areas including tourism, water supply challenges, industrial uses, grazing potential.

Probing questions on karst landscape significance. Detailed discussion on significance aspects including tourism attractions like caves and gorges, solution lakes providing water sources, water scarcity due to intermittent streams, infrastructure development challenges, limestone use in iron/steel industry, grazing suitability for sheep, cement production like Bamburi and Athi River factories, environmental management challenges. Q/A on sustainable use of limestone resources. Topic assessment.

Economic charts, Photographs of industries, Tourism materials, Infrastructure maps, Assessment worksheets

KLB Secondary Geography Form 3, Pages 178-179

Action of Water in Limestone Areas

Significance of Resultant Features

By the end of the lesson, the learner should be able to:
Explain significance of karst landscape features to humankind and countries. Analyze positive and negative impacts of karst features. Evaluate economic importance of limestone areas including tourism, water supply challenges, industrial uses, grazing potential.

Probing questions on karst landscape significance. Detailed discussion on significance aspects including tourism attractions like caves and gorges, solution lakes providing water sources, water scarcity due to intermittent streams, infrastructure development challenges, limestone use in iron/steel industry, grazing suitability for sheep, cement production like Bamburi and Athi River factories, environmental management challenges. Q/A on sustainable use of limestone resources. Topic assessment.

Economic charts, Photographs of industries, Tourism materials, Infrastructure maps, Assessment worksheets

KLB Secondary Geography Form 3, Pages 178-179

SETTLEMENT

Definition of Settlement and Types

By the end of the lesson, the learner should be able to:
Define human settlement and distinguish between rural and urban settlements. Explain characteristics of rural settlements. Describe functions of urban settlements. Account for urbanisation concept and its origins.

Q/A on local settlement types and characteristics. Teacher explains settlement definitions and types. Discussion on rural settlements and primary activities. Analysis of urban settlements and secondary/tertiary functions. Study of urbanisation concept from Greek origins.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 198-200

SETTLEMENT

Factors Influencing Location and Patterns of Settlement - Geographical Factors

By the end of the lesson, the learner should be able to:
Explain the influence of climate on settlement location. Describe how landforms affect settlement patterns. Account for the role of environmental diseases in settlement decisions. Analyze the impact of soil fertility and water bodies on settlement.

Discussion on climate factors including rainfall and temperature effects. Analysis of landform influences and elevation preferences. Study of disease-affected areas and their sparse settlement. Examination of soil fertility and water body influences on settlement density.

Chalkboard, textbook, map of Africa, exercise books

KLB Secondary Geography Form 4, Pages 200-202

SETTLEMENT

Factors Influencing Location and Patterns of Settlement - Economic and Other Factors

By the end of the lesson, the learner should be able to:
Explain economic factors influencing settlement patterns. Describe the role of defence and security in settlement location. Account for government planning effects on settlement. Analyze cultural practices and historical factors.

Analysis of economic activities affecting settlement including nomadic pastoralism and arable farming. Discussion on defence considerations and historical hill settlements. Study of government settlement schemes and planning policies. Examination of cultural practices and tribal sentiments affecting distribution.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 202-204

SETTLEMENT

Settlement Patterns

By the end of the lesson, the learner should be able to:
Define and describe nucleated settlement patterns. Explain dispersed settlement patterns and their characteristics. Account for linear settlement patterns. Give examples of each pattern type from East Africa.

Teacher explains nucleated settlements around oases and mining areas. Discussion on dispersed settlements in plateau areas and large holdings. Analysis of linear settlements along rivers, roads and transport lines. Students identify settlement patterns in their local area.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 204-206

SETTLEMENT

Settlement Patterns

By the end of the lesson, the learner should be able to:
Define and describe nucleated settlement patterns. Explain dispersed settlement patterns and their characteristics. Account for linear settlement patterns. Give examples of each pattern type from East Africa.

Teacher explains nucleated settlements around oases and mining areas. Discussion on dispersed settlements in plateau areas and large holdings. Analysis of linear settlements along rivers, roads and transport lines. Students identify settlement patterns in their local area.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 204-206

SETTLEMENT

Distribution of Major Urban Centres in East Africa

By the end of the lesson, the learner should be able to:
Identify categories of urban centres in East Africa. Locate capital cities, sea ports and lake ports. Describe mining towns, industrial towns and collecting towns. Account for gap towns and administrative towns.

Map work identifying major urban centres across East Africa. Discussion on capital cities: Nairobi, Dar-es-Salaam, Kampala. Study of sea ports and lake ports with their functions. Analysis of different town categories with specific examples.

Chalkboard, textbook, map of East Africa, exercise books

KLB Secondary Geography Form 4, Pages 206-208

SETTLEMENT

Factors Influencing Growth of Major Urban Centres in East Africa

By the end of the lesson, the learner should be able to:
Explain rural-urban migration as a growth factor. Describe natural population growth in urban areas. Account for infrastructure development effects. Analyze industrialisation, mining and tourism impacts on urban growth.

Discussion on rural-urban migration patterns and causes. Analysis of natural urban population growth and demographic factors. Study of transport infrastructure and accessibility advantages. Examination of industrial development and mining effects on town growth.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 208-210

SETTLEMENT

Factors Influencing Growth of Major Urban Centres in East Africa

By the end of the lesson, the learner should be able to:
Explain rural-urban migration as a growth factor. Describe natural population growth in urban areas. Account for infrastructure development effects. Analyze industrialisation, mining and tourism impacts on urban growth.

Discussion on rural-urban migration patterns and causes. Analysis of natural urban population growth and demographic factors. Study of transport infrastructure and accessibility advantages. Examination of industrial development and mining effects on town growth.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 208-210

SETTLEMENT

Case Studies - Thika as Industrial Centre and Kisumu as Lake Port

By the end of the lesson, the learner should be able to:
Describe Thika's location and industrial development. Explain factors favouring Thika's growth as industrial centre. Account for Kisumu's development as major lake port. Analyze factors contributing to Kisumu's growth and importance.

Study of Thika's strategic location and major industries. Analysis of factors including road network, proximity to Nairobi, and water supply. Discussion on Kisumu's history from Port Florence to major lake port. Examination of Kisumu's advantages including strategic location and population density.

Chalkboard, textbook, map of Kenya, exercise books

KLB Secondary Geography Form 4, Pages 210-213

SETTLEMENT

Case Study - Eldoret as Agricultural Collecting Centre

By the end of the lesson, the learner should be able to:
Describe Eldoret's location and historical development. Explain factors making Eldoret a leading agricultural collecting centre. Account for Eldoret's growth and expansion. Analyze Eldoret's multiple functions beyond agriculture.

Discussion on Eldoret's establishment by white settlers and agricultural focus. Analysis of strategic location along Nairobi-Kampala route. Study of collection and export facilities including airport and pipeline. Examination of administrative, educational and tourism functions.

Chalkboard, textbook, map of Kenya, exercise books

KLB Secondary Geography Form 4, Pages 213-215

SETTLEMENT

Nairobi City Development

By the end of the lesson, the learner should be able to:
Trace Nairobi's growth from railway camp to major city. Explain factors influencing Nairobi's development. Describe Nairobi's current status and international importance. Account for various functions performed by Nairobi.

Study of Nairobi's origins during railway construction and strategic advantages. Analysis of factors including climate, water supply and central location. Discussion on Nairobi's elevation to city status and international organizations. Examination of industrial, administrative, educational and commercial functions.

Chalkboard, textbook, map of Kenya, exercise books

KLB Secondary Geography Form 4, Pages 215-217

SETTLEMENT

Nairobi City Development

By the end of the lesson, the learner should be able to:
Trace Nairobi's growth from railway camp to major city. Explain factors influencing Nairobi's development. Describe Nairobi's current status and international importance. Account for various functions performed by Nairobi.

Study of Nairobi's origins during railway construction and strategic advantages. Analysis of factors including climate, water supply and central location. Discussion on Nairobi's elevation to city status and international organizations. Examination of industrial, administrative, educational and commercial functions.

Chalkboard, textbook, map of Kenya, exercise books

KLB Secondary Geography Form 4, Pages 215-217

SETTLEMENT

Problems Facing Nairobi and New York City Comparison

By the end of the lesson, the learner should be able to:
Identify major problems facing Nairobi City. Describe New York City's location and development factors. Compare growth factors between Nairobi and New York. Analyze similarities and differences between the two cities.

Analysis of Nairobi's problems including unemployment, housing, pollution and traffic congestion. Study of New York's location on islands and historical development. Discussion on New York's advantages as international centre and transport hub. Comparison of similarities and differences between both cities.

Chalkboard, textbook, world map, exercise books

KLB Secondary Geography Form 4, Pages 217-221

SETTLEMENT

Mombasa Port Development and Functions

By the end of the lesson, the learner should be able to:
Describe Mombasa's location and physical setting. Explain factors contributing to Mombasa's growth as major port. Account for modern developments at Kilindini Harbour. Analyze Mombasa's role as tourist and cultural centre.

Study of Mombasa's strategic coastal location and island setting. Analysis of railway connection and modern harbour facilities. Discussion on containerisation and Ro-Ro methods. Examination of oil refinery establishment and large hinterland.

Chalkboard, textbook, map of Kenya, exercise books

KLB Secondary Geography Form 4, Pages 221-224

SETTLEMENT

Rotterdam Port and Comparison with Mombasa

By the end of the lesson, the learner should be able to:
Describe Rotterdam's location and development history. Explain factors leading to Rotterdam's growth as world's busiest port. Account for modern facilities and extensive hinterland. Compare similarities and differences between Mombasa and Rotterdam ports.

Study of Rotterdam's location at river mouths and historical challenges. Analysis of New Waterway canal construction and Europoort development. Discussion on strategic location and modern cargo handling facilities. Comparison of both ports' hinterlands, facilities and functions.

Chalkboard, textbook, world map, exercise books

KLB Secondary Geography Form 4, Pages 224-227

SETTLEMENT

Rotterdam Port and Comparison with Mombasa

By the end of the lesson, the learner should be able to:
Describe Rotterdam's location and development history. Explain factors leading to Rotterdam's growth as world's busiest port. Account for modern facilities and extensive hinterland. Compare similarities and differences between Mombasa and Rotterdam ports.

Study of Rotterdam's location at river mouths and historical challenges. Analysis of New Waterway canal construction and Europoort development. Discussion on strategic location and modern cargo handling facilities. Comparison of both ports' hinterlands, facilities and functions.

Chalkboard, textbook, world map, exercise books

KLB Secondary Geography Form 4, Pages 224-227

SETTLEMENT

Effects of Urbanisation - Social and Economic Problems

By the end of the lesson, the learner should be able to:
Explain congestion problems in urban areas. Describe unemployment and pressure on social amenities. Account for environmental degradation in cities. Analyze increased crime and family breakdown issues.

Discussion on urban congestion during rush hours and events. Analysis of unemployment problems and job market limitations. Study of pressure on educational, health and infrastructure facilities. Examination of pollution, noise and garbage management problems.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 227-230

SETTLEMENT

Effects of Urbanisation and Solutions

By the end of the lesson, the learner should be able to:
Describe mental health disorders and housing problems in cities. Explain juvenile delinquency and urban sprawl issues. Suggest solutions to urbanisation problems. Evaluate effectiveness of proposed solutions.

Analysis of stress-related mental health problems in urban areas. Discussion on housing shortage leading to slum development. Study of youth problems and criminal activities. Examination of urban sprawl affecting agricultural land. Students suggest practical solutions to urbanisation challenges.

Chalkboard, textbook, exercise books, pen/pencil

KLB Secondary Geography Form 4, Pages 230-232

MANAGEMENT & CONSERVATION OF THE ENVIRONMENT

Introduction to Environment, Management and Conservation

By the end of the lesson, the learner should be able to:
Define the terms environment, biodiversity, ecosystem, environmental management and conservation. Explain the relationship between living and non-living components of environment. Outline reasons for environmental management and conservation.

Q/A: Review previous knowledge on environment from earlier classes. Teacher exposition on key terms with examples. Group discussion on local environmental components. Students identify examples of natural and social environments in their locality. Brainstorming on importance of environmental conservation.

Charts showing ecosystem components, Pictures of local environment, Newspaper cuttings on environmental issues

KLB Secondary Geography Form 4, Pages 228-231

MANAGEMENT & CONSERVATION OF THE ENVIRONMENT

The Need for Environmental Management and Conservation
Environmental Hazards: Natural Disasters

By the end of the lesson, the learner should be able to:
Explain reasons why environmental management and conservation is necessary. Analyze the relationship between human activities and environmental degradation. Evaluate the concept of sustainable development.

Review previous lesson through Q/A. Detailed discussion on seven key reasons for conservation: future generations, benefit of all, sustenance of human life, economic value, aesthetic value, protection of endangered species, environmental protection. Case study analysis of Kenya's conservation efforts. Assignment on local conservation examples.

Maps showing conservation areas in Kenya, Photos of endangered species, Economic data charts
World maps showing disaster-prone areas, Photos/videos of natural disasters, Richter Scale charts, News reports on recent disasters

KLB Secondary Geography Form 4, Pages 229-231

MANAGEMENT & CONSERVATION OF THE ENVIRONMENT

Environmental Hazards: Drought, Fires and Other Hazards

By the end of the lesson, the learner should be able to:
Describe the causes and effects of drought and desertification. Explain the impact of water spouts, toxic gas leaks, fires and oil spills. Analyze the relationship between environmental degradation and environmental refugees.

Review previous hazards through Q/A. Detailed discussion on drought and desertification in Horn of Africa. Case studies: Nigeria oil pipeline explosion (2000), Chernobyl nuclear disaster (1984), Bhopal gas leak (1989). Group work on effects of oil spills with Mombasa 2005 example. Students research on environmental refugees in Africa.

Maps of drought-prone areas in Africa, Photos of desertification, Newspaper reports on industrial accidents, Charts showing oil spill effects

KLB Secondary Geography Form 4, Pages 235-236

MANAGEMENT & CONSERVATION OF THE ENVIRONMENT

Floods: Causes, Effects and Control Measures
Lightning, Windstorms, Pests and Diseases

By the end of the lesson, the learner should be able to:
Explain the causes of floods including natural and human factors. Analyze the effects of flooding on human activities and environment. Evaluate various flood control measures and their effectiveness.

Q/A on previous environmental hazards. Teacher explanation of flood formation and types (flash floods, seasonal floods). Detailed case study of flooding in Kenya (Kano Plains, Budalangi, Tana River). Discussion on flood control measures: dam construction, dredging, dykes, levees, afforestation. Practical activity: design flood control system for local area. Group presentation on flood management strategies.

Maps of flood-prone areas in Kenya, Photos of flood damage, Diagrams of flood control structures, Case study materials
Diagrams of lightning formation, Photos of lightning arresters, Maps showing tsetse fly distribution, Health campaign materials, Charts on pest control methods

KLB Secondary Geography Form 4, Pages 236-239

MANAGEMENT & CONSERVATION OF THE ENVIRONMENT

Pollution: Types, Causes and Control Measures

By the end of the lesson, the learner should be able to:
Define pollution and identify main types of pollution. Explain causes and effects of air, water, land and sound pollution. Analyze pollution control measures being implemented in Kenya. Evaluate the role of individuals in environmental conservation.

Brainstorming on meaning of pollution with local examples. Detailed study of four types of pollution: air pollution (greenhouse gases, ozone depletion), water pollution (industrial, agricultural, domestic sources), land pollution (solid waste, mining), sound pollution (noise sources). Case studies: Lake Naivasha flower farms, River Nzoia industrial pollution, Nakuru flamingo deaths. Discussion on pollution control measures and government policies. Individual assignment on personal environmental conservation practices.

Photos of polluted environments, Charts showing pollution sources, Water quality test kits, Sound level meters (if available), Government policy documents

KLB Secondary Geography Form 4, Pages 245-251