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BGCSE Geography (Botswana Senior Secondary Education BSSE) practice questions

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Question 1Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which layer of the Earth is the thin, solid outer shell on which continents and ocean floors sit?

  1. The inner core
  2. The mantle
  3. The crust Correct answer.
  4. The outer core

Explanation

The Earth is layered by composition. The crust is the outermost solid shell, ranging from thin oceanic crust to thicker continental crust, and it lies above the much thicker mantle.

Question 2Physical Geography: Earth Structure, Plate Tectonics and Landforms

What is the name of the supercontinent that began to break apart about 200 million years ago?

  1. Pangaea Correct answer.
  2. Rodinia
  3. Laurasia
  4. Gondwanaland

Explanation

Pangaea was the single large landmass that later split into separate continents, providing key evidence for continental drift. The other names refer to different ancient landmasses or parts of Pangaea.

Question 3Physical Geography: Earth Structure, Plate Tectonics and Landforms

At which type of plate boundary do two plates move apart, allowing magma to rise and form new crust?

  1. Constructive boundary Correct answer.
  2. Conservative boundary
  3. Collision boundary
  4. Destructive boundary

Explanation

Constructive (divergent) boundaries occur where plates separate, so magma rises to fill the gap and new oceanic crust is created. This process builds mid-ocean ridges and rift valleys.

Question 4Physical Geography: Earth Structure, Plate Tectonics and Landforms

What is the main cause of movement of the Earth's tectonic plates?

  1. Convection currents in the mantle Correct answer.
  2. Tidal pull from the Moon
  3. Rotation of the Earth on its axis
  4. Erosion by rivers and glaciers

Explanation

Heat from the core and mantle drives slow convection currents in the semi-molten mantle rock. These currents drag the rigid plates above them, causing them to move a few centimetres per year.

Question 5Physical Geography: Earth Structure, Plate Tectonics and Landforms

A volcano formed where one oceanic plate sinks beneath a continental plate is best described as which of the following?

  1. A dome volcano on a conservative boundary
  2. A composite volcano above a subduction zone Correct answer.
  3. A rift volcano at a constructive boundary
  4. A shield volcano at a hot spot

Explanation

Where an oceanic plate subducts, water is released and melts the overlying mantle, producing sticky, gas-rich magma. This magma feeds steep-sided composite volcanoes with explosive eruptions.

Question 6Physical Geography: Earth Structure, Plate Tectonics and Landforms

What is the point on the Earth's surface directly above the focus of an earthquake called?

  1. The focus
  2. The fault line
  3. The seismic zone
  4. The epicentre Correct answer.

Explanation

The focus is the underground point where the rock breaks and seismic energy is released. The epicentre is the point on the surface vertically above the focus, where shaking is usually strongest.

Question 7Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which rock type forms when molten magma cools and solidifies?

  1. Sedimentary rock
  2. Igneous rock Correct answer.
  3. Metamorphic rock
  4. Organic rock

Explanation

Igneous rocks crystallise from molten material, either below the surface as intrusive rock or at the surface as extrusive lava. Their crystal size depends on how slowly the magma cooled.

Question 8Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which process breaks down solid rock in place without transporting the broken material away?

  1. Deposition
  2. Compaction
  3. Weathering Correct answer.
  4. Transportation

Explanation

Weathering is the in-situ breakdown of rock by physical, chemical or biological processes. The debris stays where it forms until erosion and transportation later move it.

Question 9Physical Geography: Earth Structure, Plate Tectonics and Landforms

An earthquake's epicentre is recorded 2,400 km from a seismic station. Using the rule that P-waves travel about 8 km per second, roughly how long after the earthquake does the first P-wave arrive?

  1. 300 seconds Correct answer.
  2. 19,200 seconds
  3. 30 seconds
  4. 3,000 seconds

Explanation

Travel time equals distance divided by speed, so 2,400 km divided by 8 km per second gives 300 seconds, or five minutes. This simple calculation shows why distant stations record waves minutes after the event.

Question 10Physical Geography: Earth Structure, Plate Tectonics and Landforms

A section of coastline shows two matching rock sequences, one in South America and one in West Africa. Which piece of evidence for continental drift does this best support?

  1. Paleomagnetic stripes on the ocean floor
  2. Matching fossil species across continents
  3. Matching rock types and structures across continents Correct answer.
  4. Evidence of past glaciation in tropical regions

Explanation

Identical rock formations and structures on now-separated continents suggest they were once joined. The matching sequences act like pieces of a jigsaw that fit together.

Question 11Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which feature typically forms at a conservative (transform) plate boundary?

  1. A large strike-slip fault Correct answer.
  2. A major rift valley
  3. A deep ocean trench
  4. A mid-ocean ridge

Explanation

At conservative boundaries plates slide horizontally past each other, so crust is neither created nor destroyed. The resulting stress is released along strike-slip faults, often producing shallow earthquakes.

Question 12Physical Geography: Earth Structure, Plate Tectonics and Landforms

Why does oceanic crust subduct beneath continental crust when the two collide?

  1. Continental crust is thinner and therefore breaks
  2. Oceanic crust is older and therefore lighter
  3. Oceanic crust is denser and thinner than continental crust Correct answer.
  4. Continental crust is denser and therefore sinks

Explanation

Oceanic crust is composed of denser basaltic rock and is thinner, while continental crust is lighter and thicker granite. The denser oceanic plate is therefore forced down into the mantle.

Question 13Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which sequence correctly describes the formation of a sedimentary rock such as sandstone?

  1. Melting, cooling, crystallisation
  2. Weathering, erosion, deposition, compaction Correct answer.
  3. Heating, pressure, recrystallisation
  4. Eruption, flow, solidification

Explanation

Sedimentary rocks form from material broken down by weathering and carried away by erosion. The sediment settles as layers, which are then compacted and cemented into solid rock.

Question 14Physical Geography: Earth Structure, Plate Tectonics and Landforms

A shield volcano has gentle slopes mainly because the lava that built it was which of the following?

  1. Highly viscous and gas-rich
  2. Runny and low in silica Correct answer.
  3. Cooled quickly underwater
  4. Thick and acidic

Explanation

Shield volcanoes are built from basaltic lava that is low in silica, so it is runny and flows long distances before solidifying. Repeated flows spread widely and produce gently sloping cones.

Question 15Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which statement best explains why the Mercalli scale differs from the Richter scale in describing earthquakes?

  1. Mercalli measures the energy released, while Richter measures damage
  2. Mercalli measures damage and effects, while Richter measures seismic energy Correct answer.
  3. Mercalli is only used for undersea earthquakes
  4. Mercalli records the depth of the focus

Explanation

The Mercalli scale is descriptive and rates the observed effects of shaking on people and buildings at a place. The Richter scale is instrumental and estimates the amount of energy released at the source.

Question 16Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which landform is produced by the deposition of glacial till across a valley floor?

  1. An arete
  2. A cirque
  3. A drumlin Correct answer.
  4. A hanging valley

Explanation

Drumlins are streamlined mounds of till deposited beneath an advancing ice sheet, often in swarms. Their shape records the direction of ice flow and they are built up by deposition.

Question 17Physical Geography: Earth Structure, Plate Tectonics and Landforms

In a river's upper course, which process dominates the shaping of the valley?

  1. Deposition of fine silt
  2. Vertical erosion by abrasion Correct answer.
  3. Chemical solution of limestone
  4. Lateral erosion by meanders

Explanation

In the upper course the river has a steep gradient and high energy, so it cuts downwards, deepening a narrow V-shaped valley. Abrasion by the load and hydraulic action both contribute to this vertical erosion.

Question 18Physical Geography: Earth Structure, Plate Tectonics and Landforms

A geologist finds a rock containing fossils of marine shells high in a mountain range. Which explanation is most consistent with plate tectonic theory?

  1. The fossils were deposited by glacial ice
  2. The shells were carried uphill by wind
  3. The rock formed on the sea floor and was later uplifted Correct answer.
  4. The shells grew in freshwater lakes on the mountain

Explanation

Marine fossils in mountain rock indicate the sediment was laid down under the sea. Collision of plates later compressed and uplifted the crust, raising the fossil-bearing rock to high altitude.

Question 19Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which statement best explains why earthquake damage is often greater on soft, waterlogged ground than on solid bedrock?

  1. Bedrock shakes more because it is rigid
  2. Soft ground amplifies shaking because it is loose and unstable Correct answer.
  3. Waterlogged ground prevents seismic waves from travelling
  4. Soft ground attracts seismic waves from a greater distance

Explanation

Loose, saturated sediments can amplify ground shaking and may lose strength, behaving like a liquid in a process called liquefaction. Buildings on such ground therefore suffer more damage than those on firm bedrock.

Question 20Physical Geography: Earth Structure, Plate Tectonics and Landforms

A lava flow from a volcano with very high silica content is most likely to behave in which way?

  1. Form extensive underwater pillow lavas
  2. Flow rapidly and spread thinly over a wide area
  3. Flow only short distances before solidifying Correct answer.
  4. Produce no gas and erupt quietly

Explanation

High-silica (acidic) lava is viscous and rich in gas, so it resists flow and solidifies close to the vent. This builds steep-sided domes and composite cones and is associated with explosive eruptions.

Question 21Physical Geography: Earth Structure, Plate Tectonics and Landforms

Two plates meet at a boundary where one is oceanic and the other is continental. Which set of features would you expect to find along that boundary?

  1. A transform fault with no volcanic activity
  2. A broad shield volcano above a mantle plume
  3. A mid-ocean ridge and a rift valley
  4. A deep trench, an island arc and a volcanic mountain chain Correct answer.

Explanation

Where oceanic crust subducts beneath continental crust, a deep ocean trench marks the descending plate. Melting above the subducting slab feeds a volcanic mountain chain, and island arcs may form where the setting is ocean-ocean.

Question 22Physical Geography: Earth Structure, Plate Tectonics and Landforms

A fold mountain belt contains tightly folded sedimentary layers. Which sequence of events best explains this?

  1. Layers were metamorphosed first, then deposited
  2. Layers were faulted downwards, then uplifted without folding
  3. Layers were deposited, then compressed by converging plates Correct answer.
  4. Layers were erupted as lava, then weathered

Explanation

Sediments are laid down in horizontal layers, then compressional forces at a convergent boundary squeeze them into folds. Uplift later raises the folded rocks to form a mountain belt.

Question 23Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which observation about the age of ocean floor rocks best supports the theory of sea-floor spreading?

  1. Rocks are oldest near mid-ocean ridges and youngest near continents
  2. Rocks are youngest near mid-ocean ridges and become older away from them Correct answer.
  3. Rocks are oldest at trenches and youngest at continental shelves
  4. Rocks are the same age everywhere on the ocean floor

Explanation

New oceanic crust forms at mid-ocean ridges and spreads outward, so rock age increases with distance from the ridge. Symmetrical magnetic stripes on either side of the ridge reinforce this pattern.

Question 24Physical Geography: Earth Structure, Plate Tectonics and Landforms

A region has a long history of frequent shallow earthquakes but no volcanic activity, and the boundary shows plates sliding horizontally past each other. Which conclusion is most justified?

  1. The boundary is destructive and a trench will soon form
  2. The boundary is conservative and movement is releasing stress along a fault Correct answer.
  3. The boundary is constructive and new crust is being created
  4. The boundary is a hot spot producing shield volcanoes

Explanation

Horizontal sliding of plates with shallow earthquakes and no volcanism fits a conservative boundary. Stress builds up and is released along a strike-slip fault, producing frequent shallow quakes.

Question 25Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which combination of evidence would most strongly support the claim that two now-separated continents were once joined?

  1. Similar average rainfall and similar river lengths
  2. Similar languages and similar farming methods
  3. Matching fossils, matching rock sequences and matching glacial deposits Correct answer.
  4. Similar climate today and similar population sizes

Explanation

Continental drift is supported by several independent lines of physical evidence that fit together like a jigsaw. Matching fossils, rock formations and glacial deposits on separated continents all point to a former land connection.

Question 26Physical Geography: Earth Structure, Plate Tectonics and Landforms

Which layer of the Earth lies directly beneath the crust and behaves as a hot, weak zone on which the rigid plates move?

  1. The outer core
  2. The inner core
  3. The asthenosphere Correct answer.
  4. The lithosphere

Explanation

The asthenosphere is the partly molten, plastic layer of the upper mantle lying beneath the rigid plates. Because it can flow slowly, plates of lithosphere above it are able to slide sideways over long periods.

Question 27Physical Geography: Earth Structure, Plate Tectonics and Landforms

A convergent boundary occurs where two plates move towards each other. Which landform is most typically produced at such a boundary?

  1. A fold mountain range Correct answer.
  2. A rift valley
  3. A mid-ocean ridge
  4. A transform fault

Explanation

Where plates converge, the crust is compressed and buckled upward, producing fold mountains along the collision zone. Mid-ocean ridges, rift valleys and transform faults all form where plates are separating or sliding past one another.

Question 28Physical Geography: Earth Structure, Plate Tectonics and Landforms

A student holds two small blocks of the same rock type. One was collected from the top of a steep mountain and the other from a lowland plain. Which statement best explains why the mountain sample is likely to be more angular?

  1. The mountain sample is older and therefore harder
  2. The lowland sample was formed by volcanic activity
  3. The mountain sample has been weathered by freeze-thaw action with little transport Correct answer.
  4. The lowland sample has been chemically dissolved by groundwater

Explanation

Frost shattering in cold uplands produces sharp, angular fragments, and steep slopes carry them away quickly before edges are worn smooth. In lowlands, longer transport and abrasion round the particles, so the rock fragments become smoother.

Question 29Physical Geography: Earth Structure, Plate Tectonics and Landforms

A geologist maps a region where a deep ocean trench lies close to a chain of volcanoes on the adjacent continent. Which plate setting best fits this arrangement?

  1. Two continental plates colliding
  2. An oceanic plate subducting beneath a continental plate Correct answer.
  3. An oceanic plate diverging from a continental plate
  4. Two oceanic plates sliding past each other

Explanation

A trench marks the point where dense oceanic lithosphere bends down into the mantle beneath lighter continental crust. Water released from the sinking slab lowers melting temperatures in the mantle, and the magma rises to feed volcanoes on the continent behind the trench.

Question 30Physical Geography: Earth Structure, Plate Tectonics and Landforms

Samples taken from the ocean floor show that rock age increases steadily with distance from the crest of a mid-ocean ridge, and that magnetic stripes form mirror images on either side of the crest. Which conclusion is best supported by these two observations?

  1. The continents are fixed in place and only the sea level has changed
  2. The ocean floor is being created at the ridge and spreading away from it Correct answer.
  3. The magnetic field of the Earth has never reversed direction
  4. The ocean floor is being destroyed at the ridge by erosion

Explanation

New basaltic crust forms at the ridge crest, records the magnetic field of the time, and is then carried outward on both sides as spreading continues. Symmetrical stripes and increasing age away from the crest are exactly the pattern this process predicts.

Question 31Weather, Climate and Atmosphere

Which gas makes up the largest proportion of the atmosphere?

  1. Oxygen
  2. Argon
  3. Carbon dioxide
  4. Nitrogen Correct answer.

Explanation

Dry air is dominated by nitrogen, which forms roughly 78 per cent of its volume. Oxygen is the second most abundant gas at about 21 per cent, so it is present in large amounts but still far less than nitrogen.

Question 32Weather, Climate and Atmosphere

In which layer of the atmosphere do most weather phenomena such as clouds and rain occur?

  1. Troposphere Correct answer.
  2. Stratosphere
  3. Mesosphere
  4. Thermosphere

Explanation

The troposphere is the lowest layer and holds most of the atmosphere's water vapour and dust. Air in this layer is unstable and circulates vertically, allowing clouds, rain and storms to form.

Question 33Weather, Climate and Atmosphere

What instrument is used to measure atmospheric pressure?

  1. Anemometer
  2. Thermometer
  3. Barometer Correct answer.
  4. Hygrometer

Explanation

A barometer measures the pressure exerted by the weight of air, usually reported in millibars or hectopascals. Pressure readings help forecasters identify highs and lows and predict changing weather.

Question 34Weather, Climate and Atmosphere

Which type of rainfall occurs when moist air is forced to rise over a mountain range?

  1. Convectional rainfall
  2. Relief rainfall Correct answer.
  3. Frontal rainfall
  4. Cyclonic rainfall

Explanation

Relief rainfall forms when air is pushed up the windward slope of high land and cools, condensing into cloud. The leeward side then lies in a rain shadow and receives much less rain.

Question 35Weather, Climate and Atmosphere

What is the name of the line of latitude at 23.5 degrees north of the equator?

  1. Tropic of Capricorn
  2. Tropic of Cancer Correct answer.
  3. Arctic Circle
  4. Equator

Explanation

The Tropic of Cancer lies at about 23.5 degrees north and marks the northern limit of the zone where the Sun can be directly overhead. Its southern counterpart is the Tropic of Capricorn.

Question 36Weather, Climate and Atmosphere

Which cloud type is typically associated with fair weather and appears as thin, wispy, high-altitude streaks?

  1. Stratus
  2. Cumulonimbus
  3. Nimbostratus
  4. Cirrus Correct answer.

Explanation

Cirrus clouds form high in the troposphere from ice crystals and appear as delicate streaks. They usually indicate stable, settled conditions, although increasing cirrus can signal an approaching front.

Question 37Weather, Climate and Atmosphere

Which of the following best describes the term 'weather'?

  1. The average conditions of a place over thirty years
  2. The movement of tectonic plates over time
  3. The condition of the atmosphere at a particular place and time Correct answer.
  4. The long-term pattern of rainfall in a region

Explanation

Weather refers to the short-term state of the atmosphere, including temperature, wind, cloud and rainfall at a given moment. Climate, by contrast, describes averaged conditions over many years.

Question 38Weather, Climate and Atmosphere

Air moves from a high-pressure area to a low-pressure area mainly because of differences in what?

  1. Cloud cover
  2. Air pressure Correct answer.
  3. Temperature only
  4. Humidity

Explanation

Wind is driven by pressure gradients: air flows from regions of higher pressure toward regions of lower pressure. The greater the pressure difference over a given distance, the stronger the resulting wind.

Question 39Weather, Climate and Atmosphere

A weather station records a temperature of 28 degrees Celsius and a relative humidity of 80 per cent. What does this combination most likely indicate?

  1. Air that is completely free of water vapour
  2. Air close to saturation, so condensation is likely if it cools Correct answer.
  3. Very dry air with little water vapour
  4. Air that will certainly freeze within hours

Explanation

Relative humidity expresses how close the air is to saturation at its current temperature. At 80 per cent the air holds most of the vapour it can, so slight cooling may trigger condensation into cloud, mist or dew.

Question 40Weather, Climate and Atmosphere

Why does the leeward side of a mountain range usually receive less rainfall than the windward side?

  1. Cold ocean currents always surround the leeward side
  2. Air rises faster on the leeward slope
  3. Air descends and warms, reducing its relative humidity Correct answer.
  4. The leeward side faces the prevailing wind directly

Explanation

After losing moisture on the windward slope, air descends the leeward side and warms. Warming air lowers its relative humidity and increases its capacity to hold vapour, so clouds rarely form and rain is scarce.

Question 41Weather, Climate and Atmosphere

What is the main cause of the seasonal change in temperature experienced in many tropical and subtropical regions?

  1. Variations in the Moon's gravitational pull
  2. Changes in the distance between Earth and the Sun
  3. The rotation of Earth on its axis each day
  4. The tilt of Earth's axis as it orbits the Sun Correct answer.

Explanation

Earth's axis is tilted at about 23.5 degrees, so different latitudes receive more direct sunlight at different times of year. This changing angle of incidence produces the seasons.

Question 42Weather, Climate and Atmosphere

A student notes that a coastal town has smaller daily temperature ranges than an inland town at the same latitude. Which factor best explains this?

  1. Water heats and cools more slowly than land Correct answer.
  2. Coastal towns are always at higher altitude
  3. Inland towns have more cloud cover
  4. The coast receives less sunlight

Explanation

Water has a higher heat capacity than land, so the sea warms and cools slowly and moderates coastal temperatures. Inland areas heat and cool rapidly, producing wider daily and annual ranges.

Question 43Weather, Climate and Atmosphere

Which of the following best describes a cold front?

  1. Air sinks steadily and clears the sky
  2. Cold air pushes under warm air, lifting it rapidly to form tall clouds Correct answer.
  3. Warm air rises gently over cooler air, producing steady rain
  4. Two air masses remain stationary without mixing

Explanation

At a cold front, advancing cold air wedges beneath warmer air and forces it upward steeply. This rapid uplift forms towering cumulonimbus clouds with heavy, short-lived showers and possible thunder.

Question 44Weather, Climate and Atmosphere

A barometer reading falls steadily over several hours. What weather is most likely approaching?

  1. Clear, settled conditions
  2. A prolonged drought
  3. A low-pressure system with cloud and rain Correct answer.
  4. A rise in temperature caused by a high-pressure centre

Explanation

Falling pressure usually signals the approach of a low-pressure system, where rising air favours cloud formation and precipitation. Settled weather is more often linked to rising or steady high pressure.

Question 45Weather, Climate and Atmosphere

Which process releases latent heat into the atmosphere and helps power thunderstorms?

  1. Condensation of water vapour in rising air Correct answer.
  2. Sublimation of snow on the ground
  3. Melting of ice at high altitude
  4. Evaporation of surface water

Explanation

When water vapour condenses into cloud droplets, it releases latent heat that was absorbed during evaporation. This heat warms the rising air, making it buoyant and strengthening the updraughts that drive thunderstorms.

Question 46Weather, Climate and Atmosphere

What is the main reason why the equatorial region generally has high rainfall?

  1. Prevailing winds there are always dry
  2. Intense heating causes warm, moist air to rise and condense Correct answer.
  3. Cold, dense air sinks there throughout the year
  4. It lies in a permanent rain shadow

Explanation

Strong year-round heating near the equator makes warm, moist air rise in convection currents. As the air cools with height, its vapour condenses to produce frequent heavy convectional rain.

Question 47Weather, Climate and Atmosphere

Which statement correctly distinguishes climate from weather?

  1. Climate changes hourly while weather stays constant
  2. Climate is the average atmospheric conditions over a long period, while weather is short term Correct answer.
  3. Weather and climate are identical terms used interchangeably
  4. Weather is measured over decades while climate refers to a single day

Explanation

Climate describes the typical or averaged conditions of a place over a long period, conventionally about thirty years. Weather describes the short-term state of the atmosphere at a particular time.

Question 48Weather, Climate and Atmosphere

Why do high-altitude locations tend to have lower temperatures than lowland areas at the same latitude?

  1. There is more water vapour at high altitude
  2. Highlands receive no sunlight at all
  3. The atmosphere is thinner, so it absorbs less heat and air expands and cools Correct answer.
  4. Air pressure increases with altitude, cooling the air

Explanation

At high altitude the atmosphere is thinner and holds less heat-absorbing vapour and dust. Rising air also expands and cools as pressure falls, so upland areas are generally colder than lowlands.

Question 49Weather, Climate and Atmosphere

Which of these is the correct order of the atmosphere's layers from the ground upward?

  1. Troposphere, mesosphere, stratosphere, thermosphere
  2. Troposphere, stratosphere, mesosphere, thermosphere Correct answer.
  3. Mesosphere, troposphere, stratosphere, thermosphere
  4. Stratosphere, troposphere, thermosphere, mesosphere

Explanation

The atmosphere is layered by temperature, with the troposphere nearest the ground, then the stratosphere, mesosphere and thermosphere. Each boundary is marked by a reversal in the temperature trend.

Question 50Weather, Climate and Atmosphere

A parcel of air at 30 degrees Celsius holds 14 grams of water vapour per cubic metre, and its capacity at that temperature is 28 grams per cubic metre. What is its relative humidity?

  1. 100 per cent
  2. 75 per cent
  3. 50 per cent Correct answer.
  4. 25 per cent

Explanation

Relative humidity is the actual vapour content divided by the maximum capacity at that temperature, multiplied by 100. Here 14 divided by 28 equals 0.5, giving 50 per cent.