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MATSEC IM Geography study materials
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MATSEC IM Geography practice questions

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Question 1Physical Geography

Which layer of the atmosphere contains the ozone layer that absorbs most ultraviolet radiation?

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

Explanation

Ozone is concentrated in the stratosphere, roughly 15 to 35 km above the surface, where it absorbs the bulk of incoming ultraviolet radiation. This absorption warms the stratosphere and creates the temperature inversion that keeps weather confined to the troposphere below.

Question 2Physical Geography

At approximately what latitude does a coriolis deflection reach its maximum value?

  1. 15 degrees
  2. The equator
  3. 45 degrees
  4. The poles Correct answer.

Explanation

Coriolis force is proportional to the sine of latitude, so it is zero at the equator and greatest at the poles. This is why tropical cyclones cannot form within about five degrees of the equator, where deflection is too weak to generate rotation.

Question 3Physical Geography

A rock sample contains a mineral that melts at 900 degrees Celsius under laboratory conditions. Which term describes the temperature at which this mineral begins to melt?

  1. Liquidus
  2. Curie point
  3. Solidus Correct answer.
  4. Melting point

Explanation

The solidus is the temperature at which the first melt appears in a rock or mineral assemblage. The liquidus is the higher temperature at which melting is complete, so the onset of melting is properly the solidus.

Question 4Physical Geography

Which plate boundary type is characterised by plates moving apart and new oceanic crust being created?

  1. Convergent boundary
  2. Transform boundary
  3. Divergent boundary Correct answer.
  4. Oblique-slip boundary

Explanation

At divergent boundaries, such as the Mid-Atlantic Ridge, tensional forces allow magma to rise and solidify as new oceanic crust. Sea-floor spreading at these ridges widens ocean basins over geological time.

Question 5Physical Geography

Which type of weathering is exemplified by water freezing in a rock crack and prising it apart?

  1. Biological weathering
  2. Freeze-thaw weathering Correct answer.
  3. Exfoliation
  4. Chemical weathering

Explanation

Freeze-thaw weathering is a physical process in which water expands by about nine percent on freezing, exerting pressure that widens joints until fragments break away. It is most effective in environments with repeated cycles of freezing and thawing.

Question 6Physical Geography

A river flows from a steep upland into a broad lowland. Which change in channel characteristics is most likely downstream?

  1. Reduced gradient and finer sediment load Correct answer.
  2. Decreased discharge and narrower channel
  3. Increased gradient and larger bedload
  4. Increased turbulence and more angular boulders

Explanation

Downstream, the gradient flattens, discharge generally rises as tributaries join, and the load becomes finer as abrasion reduces particle size. The result is a wider, gentler channel carrying silt and sand rather than boulders.

Question 7Physical Geography

Which process transfers water from vegetation directly into the atmosphere as vapour?

  1. Infiltration
  2. Percolation
  3. Transpiration Correct answer.
  4. Interception

Explanation

Transpiration is the loss of water vapour through stomata in leaves, and together with evaporation it is termed evapotranspiration. Infiltration and percolation move water into soil and rock, while interception temporarily captures rainfall on plant surfaces.

Question 8Physical Geography

What is the primary cause of a spring tide?

  1. The moon is at its furthest point from Earth
  2. Earth is closest to the sun in its orbit
  3. The sun and moon are aligned, producing combined gravitational pull Correct answer.
  4. The sun and moon are at right angles relative to Earth

Explanation

Spring tides occur at new and full moon, when the sun and moon align so their gravitational effects reinforce each other. This yields the greatest tidal range, occurring roughly twice each lunar month.

Question 9Physical Geography

Which coastal landform is produced by the deposition of sediment where a river meets the sea?

  1. Wave-cut platform
  2. Sea stack
  3. Spit
  4. Delta Correct answer.

Explanation

A delta forms where a river deposits sediment faster than coastal processes can remove it, often building distributary channels. Sea stacks and wave-cut platforms are erosional features, and a spit is a coastal depositional feature built by longshore drift.

Question 10Physical Geography

Which glacial feature is formed by the deposition of unsorted material directly beneath an ice sheet?

  1. Drumlin
  2. Esker
  3. Cirque
  4. Till plain Correct answer.

Explanation

Till is deposited directly from ice without water sorting, producing widespread till plains with poorly sorted material. Drumlins are streamlined till mounds, eskers are meltwater deposits, and cirques are erosional hollows.

Question 11Physical Geography

Which factor most directly determines the angle at which solar radiation strikes a given latitude?

  1. The composition of the atmosphere
  2. The rotation of Earth on its axis
  3. The altitude of the observer
  4. The tilt of Earth's axis relative to the orbital plane Correct answer.

Explanation

Earth's axial tilt, about 23.5 degrees, means the angle of incoming solar radiation varies with latitude and season. This controls insolation intensity and underpins seasonal and latitudinal climate differences.

Question 12Physical Geography

What is the name of the boundary where a cold air mass actively pushes beneath a warm air mass?

  1. Warm front
  2. Occluded front
  3. Cold front Correct answer.
  4. Stationary front

Explanation

At a cold front, dense cold air advances and undercuts warm air, forcing rapid uplift. This produces steep clouds such as cumulonimbus and often short, intense rainfall.

Question 13Physical Geography

Which climate classification type is characterised by hot, wet summers and mild winters with rainfall all year?

  1. Desert
  2. Mediterranean
  3. Tundra
  4. Humid subtropical Correct answer.

Explanation

Humid subtropical climates (Koppen Cfa) have hot summers, mild winters and year-round precipitation because moist air arrives in all seasons. Mediterranean climates differ in having a pronounced dry summer.

Question 14Physical Geography

Which soil horizon consists mainly of partly weathered parent material with little organic content?

  1. C horizon Correct answer.
  2. A horizon
  3. O horizon
  4. B horizon

Explanation

The C horizon lies beneath the solum and consists of weathered rock and parent material little affected by soil-forming processes. The O and A horizons are organic-rich, and the B horizon is a zone of accumulation.

Question 15Physical Geography

Which biome typically experiences the greatest annual rainfall and highest biodiversity?

  1. Tropical rainforest Correct answer.
  2. Savanna
  3. Temperate deciduous forest
  4. Boreal forest

Explanation

Tropical rainforests receive high rainfall and constant warmth, supporting layered canopies and exceptionally high species richness. Temperate forests, savannas and boreal forests all experience more seasonal water or temperature stress.

Question 16Physical Geography

Which factor best explains the formation of a rain shadow?

  1. Warm ocean currents raising coastal temperatures
  2. Prevailing winds blowing parallel to a coastline
  3. Cold air sinking over lowlands and condensing moisture
  4. Moist air rising over mountains and releasing rain on the windward side Correct answer.

Explanation

As moist air is forced to rise over a mountain range, it cools and releases precipitation on the windward slope. Descending air on the leeward side warms and dries, creating arid conditions such as the Atacama Desert.

Question 17Physical Geography

Which term describes the slow downslope movement of soil saturated with water?

  1. Mudflow
  2. Soil creep
  3. Solfuction Correct answer.
  4. Rockfall

Explanation

Solfuction is the slow, flowing movement of water-saturated soil, common in periglacial environments where meltwater saturates the active layer. Soil creep is slower and drier, while rockfalls and mudflows are more rapid and localized.

Question 18Physical Geography

Which factor most strongly controls the rate of chemical weathering in a limestone landscape?

  1. The age of the limestone
  2. The altitude of the plateau
  3. The presence of moisture and dissolved carbon dioxide Correct answer.
  4. The colour of the limestone

Explanation

Carbonation weathering of limestone requires water and dissolved carbon dioxide to form weak carbonic acid, which dissolves calcium carbonate. Moisture and CO2 availability therefore govern the rate of karst development.

Question 19Physical Geography

A river's discharge is measured at 40 cubic metres per second and its cross-sectional area is 20 square metres. What is the mean velocity?

  1. 0.5 metres per second
  2. 800 metres per second
  3. 2 metres per second Correct answer.
  4. 20 metres per second

Explanation

Discharge equals cross-sectional area multiplied by mean velocity, so velocity is discharge divided by area. Dividing 40 by 20 gives 2 metres per second.

Question 20Physical Geography

Which process is chiefly responsible for the formation of an oxbow lake?

  1. Glacial scouring of a valley floor
  2. Deposition at the river's mouth
  3. Downcutting of a meander by vertical erosion
  4. Erosion and deposition cutting off a meander neck Correct answer.

Explanation

Lateral erosion on the outer banks and deposition on the inner banks of a meander progressively narrow the neck until the river cuts through during a flood. The abandoned meander loop becomes an oxbow lake.

Question 21Physical Geography

Which type of volcano is characterised by steep sides and layers of ash and lava from explosive eruptions?

  1. Shield volcano
  2. Lava dome
  3. Composite (stratovolcano) Correct answer.
  4. Caldera

Explanation

Composite volcanoes form from alternating layers of viscous lava and pyroclastic material, producing steep, cone-shaped edifices such as Mount Etna. Shield volcanoes are broad and gently sloping due to fluid basalt lava.

Question 22Physical Geography

Which seismic wave type travels fastest and arrives first at a recording station?

  1. P-waves Correct answer.
  2. S-waves
  3. Love waves
  4. Surface waves

Explanation

P-waves are compressional body waves and travel fastest, so they are recorded first on a seismogram. S-waves and surface waves arrive later because they travel more slowly.

Question 23Physical Geography

Which factor is most likely to increase the risk of slope failure on a coastal cliff?

  1. Increased vegetation cover on the slope
  2. Decreased rainfall on the cliff top
  3. Decreased pore water pressure in the cliff
  4. Increased undercutting by wave action at the base Correct answer.

Explanation

Wave undercutting removes support at the base of a cliff, increasing the shear stress on the overlying mass and promoting collapse. Increased pore water pressure from rain also reduces stability, while vegetation can add some reinforcement.

Question 24Physical Geography

Which statement best explains why the intertropical convergence zone shifts north and south during the year?

  1. Earth's rotational speed changes seasonally
  2. The zone follows the seasonal migration of the most intense solar heating Correct answer.
  3. The coriolis effect reverses direction each season
  4. Ocean salinity varies with the seasons

Explanation

The ITCZ tracks the region of strongest solar heating, which migrates north in the northern summer and south in the northern winter. This migration drives seasonal shifts in tropical rainfall belts.

Question 25Physical Geography

Which combination of conditions most favours the formation of a tropical cyclone?

  1. High latitude, low humidity and strong upper winds
  2. Land surface heating with low humidity and high wind shear
  3. Cold sea surface temperature, dry air and strong wind shear
  4. Sea surface temperature above 26 degrees Celsius, high humidity and weak vertical wind shear Correct answer.

Explanation

Tropical cyclones need warm ocean water above about 26 degrees Celsius to supply latent heat, moist air and low vertical wind shear so the developing vortex is not disrupted. Cold water, dry air and high shear all suppress development.

Question 26Physical Geography

Which layer of the atmosphere contains the ozone layer that absorbs most incoming ultraviolet radiation?

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

Explanation

The ozone layer lies within the stratosphere, roughly 15 to 35 km above the surface, where ozone molecules absorb most incoming ultraviolet radiation. This absorption warms the stratosphere and produces the temperature inversion that makes the layer stable.

Question 27Physical Geography

Which type of plate boundary is associated with the formation of a deep ocean trench and an island arc?

  1. Intraplate hot-spot boundary within a single plate
  2. Destructive boundary where oceanic crust is subducted Correct answer.
  3. Constructive boundary at a mid-ocean ridge
  4. Conservative boundary where plates slide past each other

Explanation

At a destructive boundary, denser oceanic crust descends beneath another plate, creating a deep trench. Partial melting of the descending slab generates magma that rises to form a chain of volcanic islands parallel to the trench.

Question 28Physical Geography

Which rock type forms when molten material cools and solidifies beneath the surface?

  1. Biochemical sedimentary rock
  2. Metamorphic rock
  3. Intrusive igneous rock Correct answer.
  4. Clastic sedimentary rock

Explanation

Intrusive igneous rocks crystallise from magma that cools slowly at depth, producing large interlocking crystals such as those in granite. The slow cooling allows crystals time to grow, which distinguishes them from extrusive rocks.

Question 29Physical Geography

Which type of weathering breaks rock into smaller fragments without changing its chemical composition?

  1. Carbonation
  2. Mechanical weathering Correct answer.
  3. Hydrolysis
  4. Oxidation

Explanation

Mechanical weathering physically disintegrates rock through processes such as freeze-thaw and salt crystallisation. The minerals remain chemically unchanged, only the size of the fragments is reduced.

Question 30Physical Geography

Which coastal feature is a ridge of sand or shingle built across a bay by longshore drift?

  1. Blowhole
  2. Wave-cut notch
  3. Sea stack
  4. Spit Correct answer.

Explanation

A spit is an elongated ridge of deposited sediment that extends from the land into the sea where the coastline changes direction. Longshore drift carries material along the shore until the current loses energy and deposits it.

Question 31Physical Geography

Which term describes the permanent loss of ice from a glacier when ablation exceeds accumulation?

  1. Glacial retreat Correct answer.
  2. Glacial deposition
  3. Glacial advance
  4. Glacial surge

Explanation

A glacier retreats when the rate of ablation at the snout is greater than the rate at which new ice is supplied by accumulation higher up. The ice front moves back even though the ice itself continues to flow forward.

Question 32Physical Geography

Which section of a river's long profile is typically steepest?

  1. The floodplain reach
  2. The upper course near the source Correct answer.
  3. The middle course
  4. The lower course near the mouth

Explanation

The upper course near the source has the steepest gradient because the river is cutting down through upland terrain. Gradient decreases progressively downstream as the profile becomes concave.

Question 33Physical Geography

Which term describes the boundary where two different air masses meet and do not readily mix?

  1. Isotherm
  2. Front Correct answer.
  3. Anticyclone
  4. Isobar

Explanation

A front is the boundary zone between two air masses of contrasting temperature and humidity. Because the air masses have different densities, they do not mix readily and the boundary becomes a zone of cloud and precipitation.

Question 34Physical Geography

Which process in the hydrological cycle returns water from the land surface directly to the atmosphere?

  1. Percolation
  2. Throughflow
  3. Infiltration
  4. Evaporation Correct answer.

Explanation

Evaporation transfers water from open surfaces such as soil, puddles and lakes into the atmosphere as vapour. It is one of the principal outputs of a drainage basin system.

Question 35Physical Geography

Which factor most directly controls the size of material that a river can transport as bedload?

  1. The depth of the water table
  2. The velocity of the river Correct answer.
  3. The width of the floodplain
  4. The pH of the water

Explanation

Faster-flowing water exerts greater shear stress on the bed, allowing larger particles to be rolled and bounced along. As velocity falls, competence decreases and coarser material is deposited.

Question 36Physical Geography

A drainage basin has an area of 250 square kilometres and receives 800 mm of rainfall in a year. What is the total volume of rainfall input, assuming uniform distribution?

  1. 2 million cubic metres
  2. 200 million cubic metres Correct answer.
  3. 2 billion cubic metres
  4. 20 million cubic metres

Explanation

Volume equals area multiplied by depth: 250 km² is 250,000,000 m², and 800 mm is 0.8 m. Multiplying gives 200,000,000 m³, or 200 million cubic metres.

Question 37Physical Geography

Which soil-forming process involves the downward movement and redeposition of dissolved minerals and fine clay particles?

  1. Humification
  2. Salinisation
  3. Gleying
  4. Leaching Correct answer.

Explanation

Leaching removes soluble minerals and fine particles from upper horizons and carries them downward, where they may accumulate in a B horizon. This produces the pale eluvial layer often seen above a clay-rich subsoil.

Question 38Physical Geography

Which factor best explains why equatorial regions receive high annual rainfall?

  1. Strong katabatic winds descending from mountain ranges
  2. High pressure caused by cold ocean currents offshore
  3. Frequent descent of dry air from the subtropical high
  4. Persistent rising air associated with the intertropical convergence zone Correct answer.

Explanation

Near the equator, intense solar heating causes air to rise, forming a low-pressure belt where the trade winds converge. Rising air cools and condenses, producing heavy convectional rainfall throughout the year.

Question 39Physical Geography

Which process produces a hanging valley where a tributary glacier meets a larger glacial trough?

  1. The main glacier deposits lateral moraine along its flanks
  2. The tributary glacier deposits a terminal moraine across its mouth
  3. The main glacier erodes its valley more deeply than the smaller tributary glacier Correct answer.
  4. The tributary stream cuts a gorge after the ice has melted

Explanation

The larger glacier carries more ice and erodes its bed more deeply than the smaller tributary glacier. When the ice melts, the tributary valley floor is left above the main valley floor, forming a hanging valley with a waterfall.

Question 40Physical Geography

Which type of mass movement involves the rapid downslope flow of a mixture of water, soil and rock debris in a channel?

  1. Rotational slip
  2. Mudflow Correct answer.
  3. Rockfall
  4. Soil creep

Explanation

A mudflow is a fast-moving slurry of saturated fine material and debris that follows a channel. It occurs when heavy rainfall or rapid snowmelt saturates loose material on a steep slope.

Question 41Physical Geography

Which condition is most likely to produce a pyroclastic flow?

  1. Gradual weathering of volcanic ash on a gentle slope
  2. Collapse of an eruption column from a highly explosive volcano Correct answer.
  3. Slow release of gas from a dormant crater lake
  4. Effusion of low-viscosity basaltic lava from a fissure

Explanation

A pyroclastic flow forms when an explosive eruption column becomes too dense to be supported and collapses, sending a fast, hot mixture of gas and ash down the volcano's flanks. It is one of the most hazardous volcanic processes because of its speed and temperature.

Question 42Physical Geography

Which factor most strongly influences the magnitude of erosion by a wave striking a cliff?

  1. The colour of the cliff rock
  2. The wave's height and period Correct answer.
  3. The direction of the prevailing wind at night
  4. The salinity of the seawater

Explanation

Wave energy depends mainly on height and period, which together determine the force delivered to the cliff face. Longer-period waves carry more energy and can cause greater erosion, especially during storms.

Question 43Physical Geography

Which type of weathering is most active in a hot, humid tropical climate?

  1. Pressure release
  2. Chemical weathering Correct answer.
  3. Frost shattering
  4. Salt crystallisation

Explanation

High temperatures and abundant moisture accelerate chemical reactions such as hydrolysis and oxidation. This is why deep, chemically weathered regolith and kaolinite-rich soils are common in humid tropics.

Question 44Physical Geography

Which statement best explains why a meander migrates laterally across a floodplain?

  1. Erosion on the outer bank and deposition on the inner bank shift the channel sideways Correct answer.
  2. Uniform erosion along both banks widens the channel equally
  3. Deposition on the outer bank and erosion on the inner bank shift the channel sideways
  4. Vertical downcutting removes the floodplain sediment beneath the channel

Explanation

Faster flow on the outer bank of a bend causes undercutting and erosion, forming a river cliff. Slower flow on the inner bank encourages deposition and builds a point bar, so the meander migrates laterally over time.

Question 45Physical Geography

Which process transfers water from a drainage basin to the atmosphere without passing through the soil?

  1. Groundwater recharge
  2. Infiltration
  3. Baseflow
  4. Interception loss Correct answer.

Explanation

Interception loss occurs when rainfall is caught by vegetation and evaporates from leaf surfaces before reaching the ground. It is a direct pathway from precipitation to the atmosphere that bypasses the soil store.

Question 46Physical Geography

Which factor most strongly determines the type of soil that develops on a given parent material?

  1. The age of the surveyor
  2. The climate acting over time Correct answer.
  3. The colour of the underlying bedrock
  4. The distance to the nearest town

Explanation

Climate controls the rates of weathering, leaching and organic production, so it is generally the dominant soil-forming factor. Given enough time, similar climates can produce similar soils even on different parent materials.

Question 47Physical Geography

Which sequence correctly describes the evolution of an erosional coastal landform from a cave in a headland?

  1. Stump, stack, arch, cave
  2. Stack, cave, arch, stump
  3. Cave, arch, stack, stump Correct answer.
  4. Arch, cave, stump, stack

Explanation

Wave action exploits a weakness in a headland to form a cave, which may be eroded through to create an arch. Collapse of the arch roof leaves a stack, which is further eroded to a stump.

Question 48Physical Geography

Why does a glacial trough typically have a U-shaped cross-profile while a river valley is usually V-shaped?

  1. Ice deposits material evenly on both valley sides, whereas rivers remove all sediment
  2. Glaciers melt faster than rivers flow, widening the valley floor
  3. Rivers erode laterally more than vertically, whereas glaciers only deposit material
  4. Ice erodes the sides and floor by abrasion and plucking, whereas rivers cut mainly downward Correct answer.

Explanation

A glacier is a rigid mass that abrades and plucks rock from both the floor and the sides, widening and deepening the valley into a U-profile. A river has far less ability to erode its banks and concentrates energy on vertical incision, producing a narrow V-profile.

Question 49Physical Geography

Which combination best explains why a shield volcano has gentle slopes?

  1. Explosive eruptions deposit thick ash layers near the crater
  2. Low-viscosity basaltic lava flows far before solidifying Correct answer.
  3. High-viscosity rhyolitic lava piles up close to the vent
  4. Repeated caldera collapse builds steep concentric walls

Explanation

Basaltic magma is low in silica and therefore has low viscosity, allowing lava to travel long distances before cooling. Successive thin flows build a broad, gently sloping shield profile rather than a steep cone.

Question 50Physical Geography

Which reason best explains why the leeward side of a mountain range is usually drier than the windward side?

  1. Wind speeds are always lower on the leeward side
  2. The leeward side receives less solar radiation
  3. Air rises and cools adiabatically, increasing condensation
  4. Air descends and warms adiabatically, reducing relative humidity Correct answer.

Explanation

Air loses moisture as it rises and cools on the windward slope, then descends on the leeward side and warms adiabatically. The warming lowers relative humidity, so cloud formation and rainfall are suppressed.