CAMPUSNINJA / THE STUDY DESK

JAMB GeographyStudy notes & practice

Connect map skills, physical processes, people and Nigeria’s regions through worked examples and original practice.

01 Learn02 Practise03 Come back stronger

Foundation revision notes and original practice. These notes introduce physical, human and regional geography. Complete preparation also needs maps, photographs and geographical data.

What these revision notes cover
  • These notes introduce physical, human and regional geography. Complete preparation also needs maps, photographs and geographical data.
  • Map interpretation and detailed regional case studies need more practice than these survey notes provide.

01 Practical geography

Maps, scales and area

Read this lesson

What you should be able to do

  • Convert map scales and measure distance
  • Apply reduction, enlargement and area scales

Understand it

A map represents selected features of an area using symbols and a scale. Topographical maps show relief and human features; thematic maps focus on a subject such as rainfall or population. Read the title, key, orientation, scale and date before interpreting the detail.

A representative fraction such as 1:50,000 uses the same units on both sides: 1 cm represents 50,000 cm, or 0.5 km. A larger-scale map has a smaller denominator and shows more detail over a smaller area. Curved routes can be measured in short segments or with a suitable thread method.

When linear dimensions are doubled, area becomes four times as large. Reducing a 1:50,000 map to half its linear dimensions produces 1:100,000. A bar scale remains proportional when the whole map is resized with it, but a printed numerical scale must be recalculated.

Work through an example

At 1:50,000, two places are 6 cm apart. Find ground distance.

Explanation: 6 × 50,000 = 300,000 cm = 3 km. Convert centimetres to kilometres by dividing by 100,000.

Watch out: Area conversion squares the linear scale factor; do not use the distance factor alone.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which is the larger scale?

  1. 1:1,000,000
  2. 1:500,000
  3. 1:25,000
  4. 1:100,000
Show answer and explanation

Answer C: 1:25,000

At 1:25,000, 1 cm represents 25,000 cm, or 250 m, on the ground. That is less ground per map centimetre than the other options, so a feature appears larger and can show more detail. A smaller scale denominator means a larger map scale.

Question 2

A map enlarged to twice its length and width has an area

  1. Four times as large
  2. Unchanged
  3. Half as large
  4. Twice as large
Show answer and explanation

Answer A: Four times as large

Both dimensions double, so the area factor is 2 × 2 = 4. For example, a 3 cm by 2 cm rectangle has area 6 cm²; enlarged to 6 cm by 4 cm, it has area 24 cm². Doubling one dimension alone would only double the area.

Link to this topic

02 Practical geography

Bearings, relief and map interpretation

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What you should be able to do

  • Read contours and calculate gradient
  • Explain profiles and intervisibility

Understand it

A bearing is measured clockwise from north through 000° to 360°. East is 090°, south 180° and west 270°. A back bearing differs by 180°, with adjustment to remain within the full circle. Grid, true and magnetic north are distinct reference directions.

Contours join points of equal height. Close contours usually show steep slopes; wider spacing shows gentler slopes. Where contours cross a valley, their V shapes generally point upstream. Gradient is vertical rise divided by horizontal distance, using the same units.

A cross-profile plots heights along a chosen line to show relief. Intervisibility asks whether one point can be seen from another without intervening ground blocking the line of sight. Combine relief with rivers, roads, settlement and land-use evidence when explaining why people locate or work in particular places.

Work through an example

A slope rises 100 m over 2 km horizontally. Express its gradient as a ratio.

Explanation: Convert 2 km to 2,000 m. Gradient = 100:2,000 = 1:20.

Watch out: Do not divide metres by kilometres without first converting to common units.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

The back bearing of 060° is

  1. 120°
  2. 030°
  3. 300°
  4. 240°
Show answer and explanation

Answer D: 240°

Add 180°: 060° + 180° = 240°.

Question 2

Closely spaced contours generally indicate

  1. A population boundary
  2. A railway timetable
  3. A steep slope
  4. A flat plain
Show answer and explanation

Answer C: A steep slope

The same height change occurs over a shorter horizontal distance.

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03 Practical geography

Geographical data and field surveying

Read this lesson

What you should be able to do

  • Interpret charts and sampling
  • Compare chain and compass traverses

Understand it

Graphs, tables and thematic maps summarise geographical observations. Read units and categories before comparing values. A pie-chart angle is a category’s share multiplied by 360°. A choropleth shades areas by a rate or other suitable measure; raw totals can mislead when areas differ greatly in size.

Fieldwork begins with a question, a suitable method and a recording plan. Random, systematic and stratified sampling address different needs. Record dates, locations, units and limitations, and use safe accessible sites rather than treating a small sample as a complete description of a region.

Chain surveying measures distances and builds a framework of triangles with offsets. A prismatic compass measures bearings for traverses, with distances measured separately. A closed traverse returns to its start or another known point and permits closure checks; an open traverse does not close in this way. Obstacles and magnetic interference can introduce errors.

Work through an example

A crop occupies 30% of a pie chart. What angle represents it?

Explanation: 0.30 × 360° = 108°.

Watch out: A compass measures direction, not the length of a survey line.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

A survey route returning to its starting station is a

  1. Remote-sensing pixel
  2. Random contour
  3. Climate graph
  4. Closed traverse
Show answer and explanation

Answer D: Closed traverse

A closed traverse allows the end position to be checked against the start.

Question 2

Which factor can distort a compass bearing?

  1. Nearby magnetic metal
  2. Counting respondents
  3. Using a scale bar
  4. Writing the date
Show answer and explanation

Answer A: Nearby magnetic metal

Magnetic objects can deflect the needle away from the intended reference direction.

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04 Practical geography

GIS, remote sensing and location

Read this lesson

What you should be able to do

  • Identify GIS components and data forms
  • Explain uses and limitations of spatial information

Understand it

A geographic information system stores, manages, analyses and displays location-linked information. It combines people, methods, data, hardware and software. Layers can represent roads, rivers, settlements or rainfall, allowing relationships to be examined together.

Vector data uses points, lines and polygons; raster data uses cells or pixels. Surveying, satellite imagery, aerial photographs, scanning and digitising maps supply data. Remote sensing collects information from a distance; GPS-type positioning supplies coordinates. These tools are related but not identical to GIS.

GIS can help site schools, analyse flood exposure, plan transport or monitor farms. Accuracy depends on the source date, resolution, coordinate system and processing. Limited skills, cost, weak infrastructure and incomplete data can restrict use. A precise-looking map is not automatically reliable.

Work through an example

To identify houses close to a river, which layers and operation would help?

Explanation: Use house locations and the river layer, create a distance buffer around the river, and identify houses falling within it.

Watch out: A postal code identifies an area or delivery location system; it is not automatically a latitude-longitude coordinate.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which feature is naturally represented as a line in vector GIS?

  1. An entire rainfall raster
  2. A road
  3. A single borehole
  4. A city’s population total alone
Show answer and explanation

Answer B: A road

A road network is commonly stored as connected line features.

Question 2

Satellite observation of land cover is an example of

  1. Drawing a sketch from memory
  2. Remote sensing
  3. Chain surveying
  4. Ground levelling with a staff
Show answer and explanation

Answer B: Remote sensing

The sensor obtains information without direct physical contact with each observed surface.

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05 Physical geography

Earth, latitude, longitude and time

Read this lesson

What you should be able to do

  • Explain rotation, revolution and seasons
  • Calculate latitude distances and local time

Understand it

Earth is the third planet from the Sun, between Venus and Mars. Its approximately spherical shape is slightly flattened at the poles. Rotation causes the daily cycle; revolution around the Sun combined with axial tilt creates seasonal changes in sunlight and day length.

Latitude measures angular distance north or south of the Equator. Longitude measures angular distance east or west of the reference meridian. One degree of latitude is approximately 111 km; longitude spacing decreases towards the poles, so the same distance rule cannot be used everywhere for longitude.

Earth turns about 15° per hour, or 1° in four minutes. Places farther east have later local solar time. Civil time zones follow official boundaries and may differ from exact solar time. Seasonal heating is mainly about tilt and solar angle, not simply Earth being closer to the Sun.

Work through an example

At 0° longitude local solar time is noon. What is local solar time at 30°E?

Explanation: 30° ÷ 15° per hour = 2 hours ahead, so 2 p.m. This is a solar-time calculation, not a claim about a country’s legal time zone.

Watch out: Use “east ahead, west behind” for solar-time calculations, and check date changes.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Two places differ by 5° latitude along the same meridian. Approximate distance is

  1. 5,550 km
  2. 55 km
  3. 555 km
  4. 5 km
Show answer and explanation

Answer C: 555 km

5 × 111 km is approximately 555 km.

Question 2

The main cause of the annual seasons is

  1. Changing Earth–Sun distance alone
  2. Daily rotation alone
  3. Axial tilt combined with revolution
  4. Changing lunar phases
Show answer and explanation

Answer C: Axial tilt combined with revolution

Tilt changes solar angle and day length as Earth orbits the Sun.

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06 Physical geography

Earth structure, rocks and major landforms

Read this lesson

What you should be able to do

  • Classify rocks and tectonic forces
  • Relate structure to mountains, plateaus and plains

Understand it

Earth’s internal structure includes crust, mantle and core. The lithosphere includes the crust and rigid uppermost mantle, divided into plates. At the surface, atmosphere, hydrosphere, biosphere and solid Earth interact through energy flows, water movement and material cycles.

Igneous rocks form when molten material cools; sedimentary rocks form from deposited material or chemical and biological accumulation; metamorphic rocks form when existing rock changes under heat and pressure without complete melting. Granite, sandstone and marble illustrate the three groups respectively.

Compression can fold rocks; tension can pull them apart and produce faults. Fold mountains, fault-block uplands, volcanic mountains, plateaus and plains have different origins. Rock properties and structure affect drainage, soils, construction materials and erosion, so a landform’s appearance should be explained through its processes.

Work through an example

Limestone is altered by heat and pressure into marble. Classify the resulting rock.

Explanation: Marble is metamorphic because an existing rock was changed without being fully melted and recast as an igneous rock.

Watch out: The mantle is not simply a hollow underground ocean of liquid magma.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Granite is classified as

  1. Metamorphic
  2. Igneous
  3. Organic soil
  4. Sedimentary
Show answer and explanation

Answer B: Igneous

Granite forms from slowly cooled magma beneath the surface.

Question 2

Compression of rock layers most directly promotes

  1. Exfoliation
  2. Chemical weathering
  3. Wind abrasion
  4. Folding
Show answer and explanation

Answer D: Folding

Compression squeezes layers and can bend them into folds.

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07 Physical geography

Volcanoes and earthquakes

Read this lesson

What you should be able to do

  • Explain tectonic hazards
  • Distinguish intrusive and extrusive features

Understand it

Volcanism brings molten rock and gases towards or onto Earth’s surface. Magma below ground is called lava after eruption. Fluid lava can build broad shield volcanoes; more viscous magma and fragmental eruptions can build steep composite cones. Activity categories depend on eruption history and evidence, not a volcano’s shape alone.

Intrusive igneous bodies cool below ground: dykes cut across structures, sills lie along them and large bodies include batholiths. Extrusive features include lava flows, cones and volcanic plateaus. Weathering volcanic material can contribute to fertile soils, while geothermal heat can be useful.

Earthquakes release stored strain, commonly along faults. The focus is the underground origin; the epicentre lies above it at the surface. Damage depends on shaking, depth, local ground, exposure and building strength. Monitoring and resilient construction reduce risk, but exact short-term earthquake prediction is not reliable.

Work through an example

A sheet of magma cools across existing rock layers. Is it a dyke or sill?

Explanation: A dyke cuts across the layers. A sill is broadly parallel to them.

Watch out: Earthquake magnitude describes the event’s size; intensity describes effects at a location.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

The point on the surface directly above an earthquake focus is the

  1. Epicentre
  2. Crater
  3. Delta
  4. Watershed
Show answer and explanation

Answer A: Epicentre

The epicentre is the surface projection of the underground focus.

Question 2

Which is an intrusive igneous feature?

  1. Sand dune
  2. Meander
  3. Sill
  4. Beach
Show answer and explanation

Answer C: Sill

A sill forms when magma intrudes and solidifies along rock layers.

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08 Physical geography

Weathering and mass movement

Read this lesson

What you should be able to do

  • Distinguish weathering from erosion
  • Explain slope movement and tropical weathering

Understand it

Weathering breaks down or alters rock in place. Physical weathering fragments it without changing its main chemical composition; chemical weathering alters minerals through processes such as solution, oxidation and hydrolysis. Biological activity can contribute mechanically and chemically.

Warm, wet conditions often favour chemical reactions, while repeated heating, cooling, salt growth or freezing can produce physical breakdown under suitable conditions. Rock mineralogy, joints, climate, organisms and time influence the rate. Weathering supplies material for soils and later transport.

Erosion removes material through agents such as running water, waves, wind or ice. Mass movement moves material downslope under gravity, including slow soil creep, landslides and mudflows. Water can add weight and reduce friction; slope cutting and vegetation removal can increase instability.

Work through an example

A rock cracks where roots widen a joint, but the pieces remain in place. Is this erosion?

Explanation: It is biological or root-assisted physical weathering. Transport away would be erosion or another movement process.

Watch out: Weathering occurs in place; erosion includes removal and transport.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Rust-like alteration of iron-bearing minerals is

  1. Condensation
  2. Longshore drift
  3. Deposition
  4. Oxidation
Show answer and explanation

Answer D: Oxidation

Oxidation is a chemical reaction involving oxygen.

Question 2

The main driving force of mass movement is

  1. Photosynthesis
  2. A voting system
  3. Gravity
  4. Magnetic north
Show answer and explanation

Answer C: Gravity

Gravity pulls material downslope, with water and other factors affecting stability.

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09 Physical geography

Rivers and drainage landforms

Read this lesson

What you should be able to do

  • Explain erosion, transport and deposition
  • Relate river processes to landforms

Understand it

A drainage basin is the area supplying a river and its tributaries; a watershed forms its boundary. Rivers erode through hydraulic action, abrasion, attrition and solution. Transport occurs as dissolved load, suspension, saltation and traction, depending on particle size and flow energy.

Upper-course rivers often have steep gradients, narrow valleys and waterfalls where rock resistance differs. Farther downstream, lateral erosion and deposition can produce meanders and floodplains. At a meander, faster flow commonly erodes the outer bank while slower flow deposits material on the inner bank.

A cut-off meander can become an oxbow lake. Repeated floods can build levees beside a channel, while deposition at a river mouth can form a delta where conditions allow sediment to accumulate. Not every river follows one neat stage pattern, and discharge can change greatly after rainfall.

Work through an example

Why does deposition often occur on the inner side of a meander?

Explanation: Flow there is generally slower and has less capacity to carry sediment, so material is deposited.

Watch out: The watershed is a basin boundary, not the river channel itself.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Bouncing transport of small particles along a river bed is

  1. Condensation
  2. Saltation
  3. Folding
  4. Solution
Show answer and explanation

Answer B: Saltation

Saltation moves particles in short hops; traction rolls larger material.

Question 2

A detached meander loop forms a

  1. Sand spit
  2. Oxbow lake
  3. Volcanic crater
  4. Fault scarp
Show answer and explanation

Answer B: Oxbow lake

Cut-off isolates the loop from the main river channel.

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10 Physical geography

Coasts, deserts and karst

Read this lesson

What you should be able to do

  • Link agents to characteristic landforms
  • Explain erosion and deposition in contrasting environments

Understand it

Waves erode coasts through hydraulic action and abrasion, while differences in rock resistance influence headlands and bays. Erosion can develop caves, arches, stacks and wave-cut platforms. Longshore drift moves sediment along a coast when waves approach at an angle, forming features such as spits.

In dry environments, wind removes loose fine material by deflation and wears surfaces by abrasion. Dunes form by sand deposition and migrate as grains move over them. Running water still matters: occasional intense storms can create major erosion even where annual rainfall is low.

Karst develops where soluble rocks, often limestone, are dissolved by water. Features include sinkholes, caves, disappearing streams and underground drainage. Calcium carbonate deposited from dripping water forms stalactites from roofs and stalagmites from floors. Do not explain every hollow as a karst feature without considering the rock and process.

Work through an example

A cave deposit grows upward from the floor. Name it.

Explanation: A stalagmite grows upward. A stalactite hangs from the roof.

Watch out: Desert does not mean sand everywhere or an absence of water erosion.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Movement of beach sediment along a shoreline is

  1. Urbanisation
  2. Plate subduction
  3. Soil leaching
  4. Longshore drift
Show answer and explanation

Answer D: Longshore drift

Oblique swash and return backwash can move sediment along the coast.

Question 2

Karst is most directly associated with

  1. Volcanic extrusion
  2. Dissolution of soluble rock
  3. Glacial deposition
  4. Wind abrasion
Show answer and explanation

Answer B: Dissolution of soluble rock

Water enlarges cracks and cavities in rocks such as limestone.

Link to this topic

11 Physical geography

Oceans, currents and lakes

Read this lesson

What you should be able to do

  • Explain salinity and ocean circulation
  • Classify lakes and their uses

Understand it

The major oceans form a connected global water body, with seas as smaller named parts. Salinity varies with evaporation, rainfall, river input and ice processes. Oceans support transport, fishing, resources and climate regulation, but pollution and overuse can damage their ecosystems.

Winds drive much surface circulation; density differences linked to temperature and salinity drive deeper movement. Earth’s rotation and basin shape affect direction. Warm currents such as the Gulf Stream transport heat poleward; cold currents such as the Benguela can cool nearby coasts. Upwelling brings nutrients towards the surface and supports productive waters.

Lakes may occupy tectonic basins, volcanic craters, glacial hollows, river cut-offs or dammed valleys. Some are natural and others artificial reservoirs. They support water supply, irrigation, fishing, transport and recreation, while evaporation, pollution, sedimentation and competing withdrawals can reduce their benefits.

Work through an example

Why can a cold-water upwelling area support abundant fish?

Explanation: Upwelling supplies nutrients that support phytoplankton and the food web. The benefit is not simply because the water is cold.

Watch out: A warm current is warmer than surrounding water at a comparable latitude and generally carries water from a warmer region. It need not be warmer than its source or hot to touch.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Deep-ocean circulation is strongly influenced by differences in

  1. Wave height and beach slope alone
  2. Atmospheric humidity without density differences
  3. Temperature and salinity
  4. Tidal range and coast length alone
Show answer and explanation

Answer C: Temperature and salinity

These affect seawater density and sinking or rising movement.

Question 2

A reservoir created behind a dam is a

  1. Fold mountain
  2. Coral island
  3. Coastal stack
  4. Artificial lake
Show answer and explanation

Answer D: Artificial lake

It is a water body formed through human construction.

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12 Physical geography

Weather elements and instruments

Read this lesson

What you should be able to do

  • Match weather elements and instruments
  • Calculate temperature and rainfall summaries

Understand it

Weather is the short-term state of the atmosphere; climate describes long-term patterns and variability. Weather elements include temperature, rainfall, humidity, pressure, wind and cloud. Observations should be made with suitable instruments and consistent exposure and timing.

A thermometer measures temperature, a rain gauge measures rainfall depth, a barometer measures pressure, an anemometer measures wind speed and a wind vane indicates direction. A hygrometer or psychrometer estimates humidity. Wind direction is named for the direction from which it blows.

Daily temperature range is maximum minus minimum. Annual temperature range compares the warmest and coolest monthly means. Total annual rainfall sums monthly totals; it is not their average. Altitude, latitude, distance from sea, currents, relief and air masses influence weather and climate.

Work through an example

A day’s maximum is 34°C and minimum 22°C. Find daily temperature range.

Explanation: 34 − 22 = 12°C.

Watch out: A north-easterly wind comes from the north-east; it does not blow towards it.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which instrument measures atmospheric pressure?

  1. Barometer
  2. Wind vane
  3. Rain gauge
  4. Anemometer
Show answer and explanation

Answer A: Barometer

A barometer measures pressure; the other instruments measure wind or rainfall.

Question 2

Annual rainfall totals are found by

  1. Averaging the twelve monthly totals
  2. Subtracting the driest month from the wettest
  3. Adding the twelve monthly totals
  4. Multiplying only the wettest month by twelve
Show answer and explanation

Answer C: Adding the twelve monthly totals

Each month contributes to the year’s accumulated rainfall.

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13 Physical geography

Climate types and climate change

Read this lesson

What you should be able to do

  • Compare climate classifications
  • Explain causes, impacts and responses to change

Understand it

The older Greek scheme groups climates broadly into torrid, temperate and frigid zones using latitude. Köppen classification uses temperature and precipitation patterns: A tropical, B dry, C temperate, D continental and E polar groups. Letters within groups indicate further distinctions in rainfall or temperature.

Tropical rainforest climates remain wet through the year; tropical savanna climates have a marked dry season. Mediterranean climates have dry summers and wetter winters. Hot deserts have low rainfall relative to evaporation, while high altitude modifies local climate. Use climate graphs, not latitude alone, to identify a type.

Climate change is a long-term change in climate patterns. Human greenhouse-gas emissions are the main driver of recent global warming. Effects include changing heat extremes, rainfall risks and sea level. Mitigation reduces emissions or increases carbon storage; adaptation reduces harm from changes, such as through resilient drainage or crop choices.

Work through an example

A city builds flood-resilient drainage to cope with heavier downpours. Is this mitigation or adaptation?

Explanation: Adaptation: it reduces vulnerability to an impact. Cutting fossil-fuel emissions is mitigation.

Watch out: One cold day does not disprove a long-term warming trend.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

The Köppen B group mainly represents

  1. Tropical humid climates
  2. Dry climates
  3. Polar climates
  4. Temperate climates
Show answer and explanation

Answer B: Dry climates

B climates are classified by dryness relative to moisture demand.

Question 2

Which action is climate mitigation?

  1. Raising a house above flood level only
  2. Preparing an evacuation route only
  3. Reducing greenhouse-gas emissions
  4. Moving valuables before a storm
Show answer and explanation

Answer C: Reducing greenhouse-gas emissions

Mitigation addresses causes by reducing emissions or enhancing removals.

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14 Physical geography

Vegetation and succession

Read this lesson

What you should be able to do

  • Relate vegetation to environmental controls
  • Explain succession and human impacts

Understand it

Vegetation reflects climate, soil, relief, water availability and human influence. Tropical rainforest has dense, layered growth where warmth and moisture support it. Savanna combines grasses and scattered trees with seasonal moisture. Desert plants have adaptations to water shortage, while colder regions support different communities.

A plant community is a group of plants living together under particular conditions. Succession is change in community composition over time, for example after bare ground is colonised or after disturbance. Its direction depends on conditions and repeated disturbance rather than an inevitable identical endpoint everywhere.

Vegetation protects soil, stores carbon, supports wildlife and supplies useful materials. Farming, logging, fire and urban growth can change its composition or remove it. Management can include protected areas, controlled harvesting, restoration and careful fire use where ecologically appropriate.

Work through an example

Why does removing tree cover from a steep wet slope often increase erosion risk?

Explanation: Roots no longer bind soil as effectively, interception declines and more rainfall can become rapid surface runoff.

Watch out: A savanna is not simply a forest with no ecological differences.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

A major control on broad vegetation distribution is

  1. Map projection
  2. Longitude alone
  3. Administrative boundaries
  4. Climate
Show answer and explanation

Answer D: Climate

Temperature and moisture strongly affect which plants can survive.

Question 2

Gradual change in plant-community composition is called

  1. Succession
  2. Subduction
  3. Inflation
  4. Depreciation
Show answer and explanation

Answer A: Succession

Succession describes changes in communities through time.

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15 Physical geography

Soils, profiles and land use

Read this lesson

What you should be able to do

  • Explain soil formation and properties
  • Relate tropical soils to management

Understand it

Soil contains mineral particles, organic matter, water, air and organisms. Texture describes proportions of sand, silt and clay; structure describes how particles group. Porosity, drainage, nutrient status and acidity influence plant growth. Clay can retain water but may drain slowly; sandy soil often drains quickly.

Soil formation depends on parent material, climate, organisms, relief and time. Profiles show horizons, commonly organic-rich surface material above mineral layers and weathered parent material. Leaching moves dissolved substances downward, while biological activity mixes and transforms materials.

Strong weathering and leaching affect many humid tropical soils, while alluvial soils form from deposited sediment. Fertility cannot be judged by colour alone. Overgrazing, poor cultivation and vegetation removal can cause erosion; mulching, cover crops, contour practices and suitable nutrient management help maintain soil functions.

Work through an example

Why might sandy soil require more frequent watering than a clay-rich soil under similar conditions?

Explanation: Large connected pores often allow water to drain quickly, reducing the amount retained for plants.

Watch out: Texture and structure are different: particle size versus arrangement.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

The proportions of sand, silt and clay describe soil

  1. Texture
  2. Latitude
  3. Wind direction
  4. Salinity of the ocean
Show answer and explanation

Answer A: Texture

Texture concerns the sizes of mineral particles.

Question 2

Removal of dissolved nutrients down through a soil profile is

  1. Faulting
  2. Condensation
  3. Longshore drift
  4. Leaching
Show answer and explanation

Answer D: Leaching

Water can carry soluble substances into deeper layers or out of the profile.

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16 Environment

Resources and ecosystems

Read this lesson

What you should be able to do

  • Distinguish renewable and non-renewable resources
  • Explain energy flow and interdependence

Understand it

Environmental resources include land, water, air, vegetation, soil and minerals. Renewable resources can replenish on relevant timescales if use does not exceed renewal; non-renewable resources such as fossil fuels form far more slowly than they are consumed. Renewable does not mean impossible to exhaust locally.

An ecosystem contains living organisms and their physical environment. Producers capture energy, consumers obtain it by feeding, and decomposers return nutrients from dead material. Energy flows through the system and dissipates as heat, while nutrients cycle through living and non-living stores.

Human actions can change habitats, food webs, water flows and nutrient supplies. Removing predators, polluting water or converting forest can affect more than one species. Environmental balance is dynamic, not a state in which nothing ever changes. Management should consider connections and recovery limits.

Work through an example

Why can a fish stock decline even though fish are a renewable resource?

Explanation: Harvesting can exceed reproduction and growth, while habitat damage can reduce renewal. Renewability depends on management and ecosystem conditions.

Watch out: Energy is not endlessly recycled through an ecosystem in the same way as nutrients.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which is non-renewable on human timescales?

  1. A well-managed annual crop
  2. Crude oil
  3. Wind
  4. Sunlight
Show answer and explanation

Answer B: Crude oil

Petroleum formation takes geological timescales compared with its use.

Question 2

The main role of decomposers is to

  1. Break down dead material and release nutrients
  2. Transfer nutrients only by hunting herbivores
  3. Convert solar energy directly into organic matter
  4. Fix all atmospheric nitrogen without other organisms
Show answer and explanation

Answer A: Break down dead material and release nutrients

Decomposition returns substances to nutrient cycles.

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17 Environment

Hazards, conservation and risk reduction

Read this lesson

What you should be able to do

  • Distinguish hazards from disasters
  • Choose prevention and conservation measures

Understand it

A hazard is a potentially damaging event or process; a disaster occurs when its effects seriously disrupt exposed communities. Drought, earthquakes, eruptions and floods are natural hazards, but land use and vulnerability strongly influence damage. Flooding can also be worsened by blocked drains and inappropriate construction.

Deforestation, pollution, soil erosion and desertification can result from interacting human pressures and environmental conditions. Desertification is land degradation in dry areas, not simply a sand dune moving south. Prevention should target the cause: ground cover reduces soil exposure, while waste control reduces pollution.

Conservation protects resources and their continued functions through sustainable use, restoration, protected areas and enforcement. Education, local participation and viable livelihoods help measures last. Early warning, evacuation planning and resilient structures reduce hazard losses, but no measure guarantees zero risk.

Work through an example

Why can the same heavy rain cause severe flooding in one settlement and little damage in another?

Explanation: Exposure, drainage, surface cover, building location and preparedness differ. Hazard severity alone does not determine the final loss.

Watch out: Planting trees is not a universal substitute for fixing drainage or avoiding unsafe floodplain development.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which action directly reduces soil exposure on farmland?

  1. Maintaining cover crops
  2. Removing all vegetation
  3. Increasing uncontrolled grazing
  4. Burning every residue
Show answer and explanation

Answer A: Maintaining cover crops

Cover protects against raindrop impact and slows runoff.

Question 2

A hazard becomes more damaging when

  1. Nobody is exposed
  2. Vulnerability and exposure are high
  3. All buildings are resilient
  4. Warning and response are perfect
Show answer and explanation

Answer B: Vulnerability and exposure are high

Risk depends on who and what is exposed and how susceptible they are.

Link to this topic

18 Human geography

Population distribution, growth and migration

Read this lesson

What you should be able to do

  • Calculate population measures
  • Explain contrasting regional patterns

Understand it

Population density is people per unit area; distribution describes where they live. Fertile land, water, jobs and transport often attract settlement, while severe dryness, difficult relief or limited access may discourage it. Historical and political factors also matter, so physical conditions are not the whole explanation.

Dense concentrations occur in parts of India, Japan and the north-eastern United States, with different economic histories. Much of the Amazon Basin is sparsely settled relative to major urban regions; the dry west coast of southern Africa also has low-density areas. These are regional patterns, not claims that every location is identical.

Population changes through births, deaths and migration. Age-sex pyramids show structure and help assess service needs. Migration may be internal or international, voluntary or forced; push factors encourage departure and pull factors attract arrival. It can supply labour and remittances but also create pressure or skill loss.

Work through an example

A district has 600,000 people and area 3,000 km². Find density.

Explanation: 600,000/3,000 = 200 people per km².

Watch out: Population growth rate and birth rate are not the same; deaths and migration also matter.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which is a pull factor in migration?

  1. Eviction from the origin
  2. Available employment at the destination
  3. Crop failure at the origin
  4. Conflict at the origin
Show answer and explanation

Answer B: Available employment at the destination

A pull factor makes a destination attractive.

Question 2

An age-sex pyramid mainly shows

  1. Migration routes alone
  2. Population structure
  3. Monthly rainfall distribution
  4. Land-use proportions
Show answer and explanation

Answer B: Population structure

Its bars organise population by age group and sex.

Link to this topic

20 Human geography

Agriculture and economic activities

Read this lesson

What you should be able to do

  • Classify economic sectors
  • Compare agricultural systems and constraints

Understand it

Primary activities obtain natural resources; secondary activities transform materials; tertiary activities provide services; quaternary activities centre on information and knowledge. A food supply chain can connect farming, processing, transport, retail and research across these sectors.

Subsistence farming mainly supports the household; commercial farming focuses on market sales. Shifting cultivation moves cultivation as land rests, while intensive farming uses more inputs or labour per area. Plantation farming concentrates on commercial crops, and pastoral systems focus on livestock with varying mobility.

Climate, soil, relief, land tenure, labour, technology, markets and finance affect agriculture. Irrigation can reduce dependence on seasonal rain but may create water-management or salinity problems. Poor roads, storage losses, pests and unreliable inputs constrain production. Explain a system through its actual inputs and aims, not its size alone.

Work through an example

A laboratory develops improved crop varieties. Which economic sector best describes its research activity?

Explanation: Quaternary activity because its main output is knowledge and innovation, even though it supports primary agriculture.

Watch out: Commercial does not necessarily mean very large, and subsistence does not mean no surplus is ever sold.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Processing cotton into textiles is a

  1. Secondary activity
  2. Tertiary activity
  3. Quaternary activity
  4. Primary activity
Show answer and explanation

Answer A: Secondary activity

Manufacturing transforms raw materials into products.

Question 2

A direct advantage of irrigation is

  1. Removal of all drainage requirements
  2. Guaranteed prevention of soil salinity
  3. Automatic replacement of all fertilisers
  4. More control over water supply
Show answer and explanation

Answer D: More control over water supply

Irrigation supplies water when rainfall is insufficient, but other constraints remain.

Link to this topic

21 Human geography

Industry, transport, trade and tourism

Read this lesson

What you should be able to do

  • Explain industrial location and trade flows
  • Assess transport and tourism development

Understand it

Manufacturing location depends on inputs, energy, labour, markets, transport and policy. Heavy raw materials can favour source-oriented sites; perishable final products can favour nearby consumers. Industrial growth creates employment and linkages but can also produce pollution and unequal development.

Roads offer flexible access, rail moves bulk on fixed routes, ships carry large international loads and air provides speed at higher cost. Communication moves information and can coordinate production, but does not remove the need to transport physical goods. Poor maintenance, finance and connectivity constrain infrastructure in many settings.

World trade reflects resource differences, production networks, demand, technology and policy. Ports and major routes connect commodity origins with markets. Tourism uses natural and cultural attractions and supports services, but weak access, insecurity, seasonality and environmental damage can limit it. Evaluate benefits alongside local costs and conservation needs.

Work through an example

Why might a fruit-processing plant locate near farms?

Explanation: It can reduce spoilage, shorten supply time and lower transport of bulky raw fruit before processing.

Watch out: No single industrial-location factor is the most important for every factory.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which transport mode is commonly suitable for large international bulk cargo?

  1. Passenger rail transport
  2. Air freight
  3. Road transport across a continent
  4. Sea transport
Show answer and explanation

Answer D: Sea transport

Ships offer large carrying capacity and relatively low unit cost for suitable cargo.

Question 2

Protecting a cultural attraction supports tourism because it

  1. Preserves the feature visitors come to experience
  2. Guarantees no local costs
  3. Replaces every transport link
  4. Eliminates all seasonal demand
Show answer and explanation

Answer A: Preserves the feature visitors come to experience

Long-term tourism depends on maintaining the attraction and its setting.

Link to this topic

22 Regional geography

Nigeria’s location and physical setting

Read this lesson

What you should be able to do

  • Locate Nigeria and its neighbours
  • Relate relief, climate and drainage to activities

Understand it

Nigeria lies in West Africa, north of the Equator, with a southern coast on the Gulf of Guinea. Its land neighbours are Benin to the west, Niger to the north, Chad in the north-east and Cameroon to the east. Location shapes trade routes and cross-border connections.

Its physical setting includes coastal lowlands, river basins, plains and uplands such as the Jos Plateau and eastern highlands. The Niger and Benue meet at Lokoja before the Niger flows towards its delta. Rock structure and relief affect soils, drainage, transport and settlement.

Rainfall and vegetation generally change from the wetter south towards the drier north, with important local and altitude variations. Moist south-westerly and dry north-easterly air influences help explain seasonal conditions. Do not reduce the whole country to one rainfall calendar; location and seasonal movement matter.

Work through an example

Which two major rivers meet at Lokoja?

Explanation: The Niger and Benue. Their confluence is an important feature in Nigeria’s drainage pattern.

Watch out: Nigeria’s north-east contact with Chad is distinct from its much longer northern boundary with Niger.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Nigeria’s western land neighbour is

  1. Senegal
  2. Kenya
  3. Benin
  4. Ghana
Show answer and explanation

Answer C: Benin

Benin lies immediately west of Nigeria.

Question 2

The Jos Plateau is an example of Nigeria’s

  1. Coastal lagoon
  2. Upland relief
  3. Coral reef
  4. Ocean trench
Show answer and explanation

Answer B: Upland relief

It is an elevated plateau within the country’s interior.

Link to this topic

23 Regional geography

Nigeria’s people and natural resources

Read this lesson

What you should be able to do

  • Explain population patterns and migration
  • Connect resources with uses and conservation

Understand it

Nigeria’s population is unevenly distributed, influenced by farming potential, historical settlement, markets, administration and employment. Large urban centres attract migration, while many rural communities remain important production areas. Ethnic and language distributions overlap and should not be treated as rigid borders.

Internal migration includes rural-urban, urban-urban and seasonal movements. It can provide labour and income but also strain housing and services or reduce labour in origin areas. A current population total requires a dated source and method; a census count and a projection are not interchangeable.

Resources include petroleum and gas in sedimentary basins, diverse solid minerals, farmland, forests and water. Petroleum activity is strongly associated with the Niger Delta, while tin mining is historically associated with the Jos area. Resource development should consider pollution, land restoration, local livelihoods and the difference between occurrence and commercial production.

Work through an example

Why should a population figure be labelled as a census or projection?

Explanation: A census aims to enumerate people at a date; a projection estimates later population using assumptions. Their methods and uncertainty differ.

Watch out: Finding a mineral deposit does not prove that large-scale production is operating there.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

A major pull factor towards a Nigerian city is often

  1. Loss of jobs in the destination
  2. Declining access to schools at the destination
  3. Employment and services
  4. Deteriorating destination infrastructure
Show answer and explanation

Answer C: Employment and services

People may move for jobs, education and services, although opportunities are not guaranteed.

Question 2

Tin mining is historically associated with the

  1. Jos Plateau area
  2. Sokoto plains
  3. Lagos coastal lagoons
  4. Niger Delta creeks
Show answer and explanation

Answer A: Jos Plateau area

The Jos Plateau is a well-known historical tin-mining area.

Link to this topic

24 Regional geography

Nigeria’s agriculture, industry and connections

Read this lesson

What you should be able to do

  • Relate crop and industrial patterns to location
  • Assess transport, trade and tourism constraints

Understand it

Nigeria’s farming systems include crop cultivation, mixed farming, livestock production and irrigation in suitable areas. Cocoa is associated with parts of the humid south-west; oil palm with wetter southern areas; cereals such as millet and sorghum are important in drier northern settings. These patterns are broad rather than exclusive state-by-state boundaries.

Manufacturing includes food processing, textiles, cement and other industries in different locations. Market size, raw materials, labour, power, finance and transport influence sites and competitiveness. Coastal ports connect international trade, while roads, rail and inland routes link production and consumption areas.

Regional trade moves food, livestock, manufactured goods and services between areas; international trade connects Nigeria with overseas markets. Tourism can draw on landscapes, wildlife and cultural heritage. Better infrastructure, maintenance, safety, skills and conservation can improve access, while development must protect the resources and communities involved.

Work through an example

Why is a blanket recommendation to grow the same crop everywhere in Nigeria poor geography?

Explanation: Rainfall, soils, temperature, water access and markets vary, so crop suitability and profitability differ between places.

Watch out: A crop’s main producing region does not mean it can never be grown elsewhere.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Cocoa cultivation is broadly associated with Nigeria’s

  1. High-altitude bare-rock summits
  2. Tidal saltwater channels
  3. Sahelian far-northern areas
  4. Humid south-western areas
Show answer and explanation

Answer D: Humid south-western areas

Cocoa generally favours warm humid conditions found in parts of the south-west.

Question 2

A major benefit of connecting farming areas to markets is

  1. Reduced isolation and improved market access
  2. Making storage unnecessary
  3. Eliminating every price fluctuation
  4. Guaranteeing identical incomes
Show answer and explanation

Answer A: Reduced isolation and improved market access

Transport links can reduce delays and costs and widen sales opportunities.

Link to this topic

25 Regional geography

ECOWAS and West African integration

Read this lesson

What you should be able to do

  • Identify current members with historical context
  • Evaluate benefits and challenges of regional cooperation

Understand it

ECOWAS is the Economic Community of West African States, established in 1975 to promote regional cooperation and integration. Its work includes trade, movement, infrastructure and wider peace and development concerns. Geography helps explain why neighbouring economies can benefit from connected markets and routes.

The current member grouping checked for this course comprises Benin, Cabo Verde, Côte d’Ivoire, The Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Nigeria, Senegal, Sierra Leone and Togo. Burkina Faso, Mali and Niger withdrew effectively on 29 January 2025. Older 15-member maps need a historical date rather than silent reuse.

Benefits can include larger markets, coordinated infrastructure and easier regional links. Challenges include uneven development, weak transport, policy differences, insecurity and financing constraints. Integration does not remove national borders or guarantee that every agreement works fully in practice. Separate the organisation’s aims from its measured outcomes.

Work through an example

Why is Niger still a neighbour of Nigeria even after leaving ECOWAS?

Explanation: Geographical location and membership of an organisation are different facts. Withdrawal changes institutional membership, not the physical border.

Watch out: West Africa and ECOWAS are not identical geographic membership lists.

2 practice questions with answers

Try each question before opening its answer. These are original CampusNinja practice questions.

Question 1

Which country remains among the current ECOWAS members listed in this lesson?

  1. Mali
  2. Burkina Faso
  3. Ghana
  4. Niger
Show answer and explanation

Answer C: Ghana

Ghana remains in the current grouping; the other three withdrew in January 2025.

Question 2

A likely benefit of a shared regional transport corridor is

  1. Better cross-border market access
  2. Automatic removal of all production costs
  3. An end to every political disagreement
  4. Identical climates in all countries
Show answer and explanation

Answer A: Better cross-border market access

Improved connections can reduce travel barriers and support regional exchange.

Link to this topic

Syllabus source and learning material

Scope checked against JAMB’s IBASS source on 2026-10-16. Current IBASS file; not independently labelled 2027. Notes, examples and practice questions are original CampusNinja learning material, not authenticated JAMB past questions.

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