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QCAA Geography study materials
QCAA Geography study resources

QCAA Geography practice questions

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Question 1Geographical inquiry and skills

A geographer wants to show the proportion of a city's workforce employed in each of six industries. Which graph type is most appropriate?

  1. A pie chart Correct answer.
  2. A climate graph
  3. A scattergraph
  4. A cross-section

Explanation

A pie chart displays parts of a single whole, so it suits proportional data such as workforce shares that sum to 100 per cent. Scattergraphs and climate graphs compare two variables, and cross-sections show vertical profiles of landforms.

Question 2Geographical inquiry and skills

On a map with a scale of 1:50 000, a straight-line distance of 6 cm represents what real-world distance?

  1. 300 km
  2. 30 km
  3. 3 km Correct answer.
  4. 0.3 km

Explanation

A scale of 1:50 000 means 1 cm on the map equals 50 000 cm on the ground, which is 0.5 km. Multiplying 6 cm by 0.5 km gives 3 km.

Question 3Geographical inquiry and skills

Which source would provide the most reliable evidence of long-term population change in a local government area?

  1. A single social media poll conducted this year
  2. A tourist brochure describing the town
  3. An opinion piece in a local newspaper
  4. A series of national census datasets across several decades Correct answer.

Explanation

Census data are collected systematically at regular intervals using consistent methods, allowing genuine trends to be identified over time. Single polls, opinion pieces and promotional material are not systematic or repeatable sources.

Question 4Geographical inquiry and skills

A student records the number of vehicles passing a school gate in five-minute intervals. What type of data has been collected?

  1. Continuous data
  2. Discrete data Correct answer.
  3. Nominal data
  4. Ordinal data

Explanation

Counts of whole vehicles can only take whole-number values, so the data are discrete. Continuous data would arise from measurement such as speed or temperature, while ordinal and nominal data are categorical.

Question 5Geographical inquiry and skills

What is the primary purpose of a geographic information system (GIS) in fieldwork analysis?

  1. To capture, store, analyse and display spatially referenced data Correct answer.
  2. To measure temperature and humidity in the field
  3. To translate foreign-language maps
  4. To replace fieldwork with simulated data

Explanation

A GIS integrates layers of spatially referenced data so that patterns, relationships and queries can be analysed and mapped. It supports fieldwork analysis but does not substitute for collecting primary data or act as a measuring instrument.

Question 6Geographical inquiry and skills

A questionnaire asks: 'Do you agree that the new shopping centre has ruined our town?' What is the main weakness of this question?

  1. It cannot be answered by local residents
  2. It is too short for respondents to understand
  3. It is a leading question that pressures respondents toward one answer Correct answer.
  4. It collects quantitative data only

Explanation

The word 'ruined' embeds a negative judgement, so respondents are steered toward agreeing and the results become biased. A neutral wording such as 'What is your view of the new shopping centre?' would produce more valid data.

Question 7Geographical inquiry and skills

Which element of a map allows a reader to interpret what symbols such as a blue line or a green patch represent?

  1. The legend Correct answer.
  2. The grid reference
  3. The title
  4. The north point

Explanation

The legend, or key, lists each symbol used on the map and explains its meaning. The north point gives orientation, grid references give location, and the title states the map's subject.

Question 8Geographical inquiry and skills

A researcher needs to know the exact height of a hill summit from a topographic map. Which map feature should be consulted?

  1. The scale bar
  2. The magnetic declination diagram
  3. The spot height Correct answer.
  4. The contour interval

Explanation

A spot height is a printed figure giving the precise elevation of a specific point, such as a summit. Contour interval, scale bar and declination provide other kinds of information.

Question 9Geographical inquiry and skills

A student wants to compare rainfall totals for six towns on a single graph. Which presentation is most suitable?

  1. A line graph
  2. A choropleth map
  3. A flow-line map
  4. A bar chart Correct answer.

Explanation

A bar chart compares discrete categories such as towns using the length of separate bars. A line graph implies continuity along a scale, while choropleth and flow-line maps show spatial distributions or movements.

Question 10Geographical inquiry and skills

A settlement has a population of 48 000 and an area of 160 km². What is its population density?

  1. 3000 people per km²
  2. 3 people per km²
  3. 30 people per km²
  4. 300 people per km² Correct answer.

Explanation

Population density equals population divided by area, so 48 000 divided by 160 gives 300 people per km². The calculation requires dividing rather than multiplying the two figures.

Question 11Geographical inquiry and skills

A scattergraph of distance from the city centre against average house price shows a strong negative correlation. What does this indicate?

  1. Distance and house price are unrelated
  2. House prices rise as distance from the centre increases
  3. House prices tend to fall as distance from the centre increases Correct answer.
  4. Every house near the centre is more expensive than every house further out

Explanation

A negative correlation means that as one variable increases, the other tends to decrease, so greater distance is associated with lower average prices. Correlation describes a general trend and does not guarantee the outcome for every individual case.

Question 12Geographical inquiry and skills

A student samples soil along a transect running from a riverbank up a slope. Why is a transect an appropriate sampling method here?

  1. It measures the total area of the site
  2. It removes the need to record data accurately
  3. It guarantees a random sample of the whole area
  4. It reveals how characteristics change systematically across a gradient Correct answer.

Explanation

A transect places sampling points along a line so that gradual changes across an environmental gradient can be detected. It is a systematic rather than random method and still requires careful recording.

Question 13Geographical inquiry and skills

A map of a catchment uses darker blue shading for sub-catchments with higher average runoff. Which mapping technique is being used?

  1. Isoline mapping
  2. Choropleth mapping Correct answer.
  3. Proportional-symbol mapping
  4. Dot-density mapping

Explanation

Choropleth maps shade or pattern whole areas according to the value of a variable, which suits aggregated data for defined regions. Isolines join points of equal value, dots show density, and proportional symbols vary in size.

Question 14Geographical inquiry and skills

A researcher calculates the mean of a dataset that includes one extremely high outlier. What is the likely effect on the mean and median?

  1. The median is pulled upward more than the mean
  2. Both are unaffected by the outlier
  3. Both shift downward equally
  4. The mean is pulled upward more than the median Correct answer.

Explanation

The mean uses every value, so an extreme high value drags it upward. The median depends on position in the ordered data and is therefore resistant to outliers.

Question 15Geographical inquiry and skills

A geographer overlays a land-use layer, a soil layer and a flood-extent layer in a GIS. What is the main analytical benefit of this overlay?

  1. It identifies areas where multiple conditions coincide Correct answer.
  2. It converts qualitative data into quantitative data
  3. It removes the need for ground-truthing
  4. It increases the resolution of each layer

Explanation

Overlaying layers allows the analyst to find places where several variables intersect, such as flood-prone land with particular soils and land uses. Overlay does not change data resolution, transform data types, or replace field verification.

Question 16Geographical inquiry and skills

A survey of 20 students out of a school of 1200 is used to draw conclusions about the whole school. What is the main limitation?

  1. The survey collects too much data
  2. The results are automatically invalid because students were surveyed
  3. The sample is too large to analyse
  4. The sample is small and may not represent the whole school Correct answer.

Explanation

A sample of 20 from 1200 is very small and may not capture the diversity of the population, so generalising to the whole school is risky. Sample size and representativeness determine how far findings can be extended.

Question 17Geographical inquiry and skills

Which statement best describes the difference between primary and secondary data?

  1. Primary data are always more accurate than secondary data
  2. Primary data are numerical; secondary data are always written
  3. Primary data are collected indoors; secondary data are collected outdoors
  4. Primary data are collected firsthand; secondary data were collected by others Correct answer.

Explanation

Primary data are gathered directly by the researcher for a specific purpose, while secondary data already exist and were collected by someone else. Accuracy depends on method and source rather than on the primary or secondary label.

Question 18Geographical inquiry and skills

A line graph of monthly rainfall shows a sharp spike in one month. Which interpretation is most defensible?

  1. The climate has permanently changed
  2. That month recorded an unusually high total compared with the rest of the year Correct answer.
  3. The rainfall data for that month must be wrong
  4. The graph's scale is misleading

Explanation

A single spike indicates a value well above the surrounding pattern, which may reflect a genuine extreme event. Concluding that the data are erroneous or that climate has permanently changed goes beyond what one value can show.

Question 19Geographical inquiry and skills

A student uses a quadrat to estimate the percentage cover of grass in a school oval. Why should several quadrats be placed rather than one?

  1. To reduce the influence of chance variation on the estimate Correct answer.
  2. To increase the size of each quadrat
  3. To avoid recording the species present
  4. To make the sampling random rather than systematic

Explanation

Repeated quadrats average out local variation so the estimate better represents the whole area. The number of quadrats does not change quadrat size, and placement can still be random or systematic.

Question 20Geographical inquiry and skills

On a topographic map, contour lines are closely spaced on one hillside and widely spaced on another. What does this indicate?

  1. The widely spaced side is steeper
  2. The closely spaced side is lower in elevation
  3. The closely spaced side is steeper Correct answer.
  4. Both sides have equal slope

Explanation

Contours close together show a rapid change in height over a short horizontal distance, which means a steep slope. Widely spaced contours indicate gentler gradients, and spacing says nothing about absolute elevation.

Question 21Geographical inquiry and skills

A geographer wants to test whether traffic volume decreases with distance from a central business district. Which approach best matches this aim?

  1. Read a novel set in the city centre
  2. Count vehicles at sites at increasing distances along a road and plot the results Correct answer.
  3. Interview one resident about traffic near their home
  4. Measure rainfall at each site

Explanation

The aim involves a relationship between two variables, so systematic counts at sites representing a range of distances allow that relationship to be tested. A single interview or unrelated measurement cannot reveal a distance-related pattern.

Question 22Geographical inquiry and skills

Two datasets report the same average income for a suburb, but one has a much larger standard deviation. What does this difference imply?

  1. The first dataset contains no variation
  2. Incomes in the second dataset are more spread out around the average Correct answer.
  3. The second dataset has a higher average
  4. Incomes in the second dataset are all identical

Explanation

Standard deviation measures dispersion around the mean, so a larger value indicates greater spread even when the averages match. It does not change the mean itself or imply that every value is identical.

Question 23Geographical inquiry and skills

A choropleth map shows rates per 1000 people, but the mapping units vary greatly in population size. Why can this produce a misleading impression?

  1. Large-area units with small populations can dominate the visual pattern Correct answer.
  2. Choropleth maps cannot show numerical data
  3. Rates cannot be mapped using shading
  4. Small units always contain more people

Explanation

Shading is applied to whole areas, so physically large units attract more visual attention regardless of how many people live there. This can exaggerate patterns in sparsely populated regions and is a known limitation of area-based shading.

Question 24Geographical inquiry and skills

A researcher finds a correlation of 0.8 between average temperature and ice-cream sales across 30 cities. Which conclusion is most justified?

  1. Higher temperatures cause higher ice-cream sales, proving causation
  2. Ice-cream sales cause temperatures to rise
  3. There is a strong positive association, but causation cannot be established from this evidence Correct answer.
  4. The correlation is too weak to interpret

Explanation

A value of 0.8 indicates a strong positive association, but correlation alone cannot demonstrate that one variable causes the other. Confounding factors and the study design must be considered before causal claims are made.

Question 25Geographical inquiry and skills

A fieldwork plan proposes sampling a river at three sites chosen because they are easy to reach from the bus route. What is the main threat to the validity of the findings?

  1. Site selection is based on convenience rather than the variable being studied Correct answer.
  2. River sampling cannot be repeated
  3. The bus route adds too much data
  4. Three sites are too many to sample

Explanation

Convenience sampling can introduce bias because the chosen sites may not represent the range of river conditions relevant to the research question. Validity depends on selecting sites that reflect the variable under investigation.

Question 26Geographical inquiry and skills

A geographer is planning an inquiry into coastal erosion at a local beach. Which sequence best represents the stages of a geographical inquiry?

  1. Collecting data, drawing conclusions, formulating a question, analysing data and evaluating
  2. Analysing data, evaluating, collecting data, formulating a question and drawing conclusions
  3. Formulating a question, collecting data, analysing data, drawing conclusions and evaluating Correct answer.
  4. Drawing conclusions, formulating a question, collecting data, evaluating and analysing data

Explanation

Geographical inquiry follows a logical cycle in which a question or hypothesis frames the investigation, data are then gathered, analysed and interpreted, and conclusions are reached before the process is evaluated for reliability and validity. The other sequences place interpretation before evidence has been gathered, which breaks the logic of the method.

Question 27Geographical inquiry and skills

A student measures the straight-line distance between two towns on a 1:50 000 topographic map as 8 cm. What is the real distance in kilometres?

  1. 0.4 km
  2. 4 km Correct answer.
  3. 400 km
  4. 40 km

Explanation

A scale of 1:50 000 means one unit on the map represents 50 000 of the same units on the ground, so 8 cm becomes 400 000 cm. Dividing by 100 000 to convert centimetres to kilometres gives 4 km.

Question 28Geographical inquiry and skills

A geographer wants to show the proportion of a city's workforce employed in each of five industries using a single diagram. Which presentation is most suitable?

  1. A scattergraph of age against income
  2. A divided bar or pie chart Correct answer.
  3. A topographic cross-section
  4. A line graph with time on the horizontal axis

Explanation

A divided bar or pie chart displays parts of a whole, which suits data expressed as proportions of a total workforce. Line graphs, cross-sections and scattergraphs are designed for trends over time, elevation profiles and relationships between two variables respectively.

Question 29Geographical inquiry and skills

Which of the following is an example of qualitative data collected during fieldwork?

  1. The number of pedestrians passing a point in ten minutes
  2. Residents' written comments about noise in their street Correct answer.
  3. The width of a beach measured in metres
  4. The pH of water at five river sites

Explanation

Qualitative data describe qualities, opinions and meanings rather than numerical measurements, so written comments are qualitative. The other options are numerical measurements and therefore quantitative.

Question 30Geographical inquiry and skills

A student plots the distance of houses from a factory against the noise level recorded at each house and finds a moderate positive correlation. Which statement best describes what the correlation shows?

  1. Noise levels are unrelated to distance from the factory
  2. Distance from the factory causes noise to increase
  3. Every house at a greater distance recorded a higher noise level than every closer house
  4. As distance from the factory increases, noise levels tend to increase Correct answer.

Explanation

A positive correlation indicates that the two variables tend to increase together across the sampled cases, without implying that one causes the other. It also describes a general tendency, not a rule that holds for every individual data point.

Question 31Geographical inquiry and skills

A geographer converts a raster land-cover map into vector polygons before calculating the area of each land-cover type. What is the main reason for this conversion?

  1. Vector data remove the need for a coordinate reference system
  2. Vector data allow precise area and length calculations on defined boundaries Correct answer.
  3. Vector data eliminate errors caused by the original classification
  4. Vector data always store more attributes than raster data

Explanation

Vector models represent features as points, lines and polygons with explicit geometry, which supports accurate measurement of area and perimeter along defined boundaries. Conversion does not add attributes, remove the need for a coordinate system, or correct misclassification in the source data.

Question 32Geographical inquiry and skills

A student wants to select a sample of households in a suburb so that every household has an equal chance of being chosen. Which method best achieves this?

  1. Choosing households nearest the surveyor's starting point
  2. Selecting every household on the main road only
  3. Asking for volunteers through a community noticeboard
  4. Selecting households using a random number generator applied to a street list Correct answer.

Explanation

Random selection gives every member of the population an equal and independent chance of inclusion, which reduces bias, and applying a random number generator to a complete list achieves this. Convenience, volunteer and single-street approaches all introduce systematic bias.

Question 33Geographical inquiry and skills

A researcher reads that a suburb's population grew by 12% over a decade, but notes the suburb was enlarged by a boundary change partway through. Why does this matter for the conclusion?

  1. Percentage growth is always less reliable than absolute growth
  2. The boundary change alters the population base, so growth from migration and births is mixed with growth from added area Correct answer.
  3. A 12% change is too small to be affected by boundary changes
  4. Boundary changes only affect maps, not demographic statistics

Explanation

Growth rates compare a population at two times, so if the area being counted changes, part of the apparent increase reflects newly included residents rather than demographic change. The conclusion is therefore confounded unless the data are adjusted to a consistent boundary.

Question 34Geographical inquiry and skills

A fieldwork group records pebble size at 20 points along a beach and repeats the measurement at each point three times. What is the main purpose of the repeat measurements?

  1. To increase the range of the results
  2. To make the sample less representative
  3. To remove the need for a sampling strategy
  4. To reduce the influence of measurement error on the average Correct answer.

Explanation

Repeating a measurement at the same point allows random errors in reading or technique to average out, improving the reliability of the value recorded. Repeats do not broaden the range, reduce representativeness, or substitute for a sampling strategy across the site.

Question 35Geographical inquiry and skills

A geographer wants to show how a bushfire scar changed in shape and extent over four successive weeks. Which approach is most appropriate?

  1. A single choropleth map of one week
  2. A pie chart of the scar area in each week
  3. A series of maps of the scar for each week using the same scale and extent Correct answer.
  4. A table listing the perimeter length each week

Explanation

A sequence of maps drawn at the same scale and extent allows the changing shape and position of the scar to be compared directly. A single map, a pie chart or a table of lengths cannot show spatial change in form and location.

Question 36Geographical inquiry and skills

A student compares two suburbs and finds suburb A has a mean household income of $900 per week with a standard deviation of $50, while suburb B has the same mean with a standard deviation of $400. What is the most accurate conclusion?

  1. The mean income in suburb B has been calculated incorrectly
  2. Incomes in suburb B are generally higher than in suburb A
  3. Incomes in suburb A are more evenly spread around the mean than in suburb B Correct answer.
  4. Suburb A has more households than suburb B

Explanation

The standard deviation measures the typical spread of values around the mean, so a much smaller value in suburb A indicates that incomes cluster more tightly around the same average. Equal means show that average income levels are the same, while spread differs.

Question 37Geographical inquiry and skills

A geographer compares a 1:25 000 map with a 1:250 000 map of the same region. Which statement correctly describes the difference?

  1. Both maps show the same ground area at the same level of detail
  2. The 1:25 000 map covers a smaller ground area with more detail Correct answer.
  3. The 1:250 000 map covers a smaller ground area with more detail
  4. The 1:250 000 map shows more detail because its number is larger

Explanation

A smaller representative fraction indicates a larger-scale map, which shows a smaller ground area in greater detail. The 1:250 000 map is a smaller-scale map, covering more ground with less detail per unit area.

Question 38Geographical inquiry and skills

A council wants to identify which blocks in a suburb are most exposed to urban heat, combining satellite surface-temperature data, tree-canopy cover and building density. Which analytical approach is most appropriate?

  1. Drawing a cross-section through the suburb
  2. Overlaying the three spatial layers in a GIS and combining them into a composite index Correct answer.
  3. Ranking blocks by a single variable such as canopy cover alone
  4. Interviewing residents about how hot they feel in summer

Explanation

Exposure to urban heat is a multi-factor condition, so overlaying the three spatial layers and combining them into a weighted index allows blocks to be compared on all factors at once. Single-variable ranking, interviews and cross-sections each capture only part of the picture or lack spatial coverage.

Question 39Geographical inquiry and skills

A student concludes that a river's discharge increases downstream after measuring three sites on one day. Which additional evidence would most strengthen this conclusion?

  1. Repeated measurements at the same sites across several seasons Correct answer.
  2. A single photograph of each site taken on the same day
  3. A map showing the river's course from source to mouth
  4. A description of the weather on the day of measurement

Explanation

A conclusion drawn from one day of data describes a single moment, so repeating the measurements across seasons tests whether the pattern is consistent and not simply a result of that day's conditions. Photographs, weather notes and a course map add context but do not test the pattern's reliability.

Question 40Geographical inquiry and skills

Two fieldworkers measure the same 50 pebbles and obtain mean long-axis lengths of 42 mm and 51 mm. Which explanation for the difference is most consistent with the principles of measurement reliability?

  1. The pebbles changed size between the two measurements
  2. Mean values from the same sample should always be identical regardless of method
  3. The fieldworkers probably applied different measurement criteria or instruments, reducing inter-observer reliability Correct answer.
  4. The difference is impossible and one dataset must be fabricated

Explanation

Inter-observer reliability depends on all fieldworkers using the same instrument and the same definition of what is being measured, such as the longest axis. When criteria or tools differ, systematic differences appear between observers even on the same sample.

Question 41Responding to geographical challenges (physical processes and natural hazards)

Which natural hazard is most directly associated with the movement of tectonic plates along a convergent boundary?

  1. A bushfire started by dry lightning
  2. A flood caused by a storm surge
  3. An earthquake caused by sudden fault rupture Correct answer.
  4. A tsunami generated by a submarine landslide

Explanation

Convergent boundaries are zones where plates collide and stress accumulates in the crust until it is released suddenly as an earthquake along a fault. Other hazards listed are driven by atmospheric, hydrological or slope processes rather than tectonic stress release.

Question 42Responding to geographical challenges (physical processes and natural hazards)

The Richter scale measures the magnitude of an earthquake. What does magnitude describe?

  1. The duration of shaking felt by people nearby
  2. The amount of damage caused at a particular place
  3. The depth below the surface where rupture begins
  4. The energy released at the earthquake source Correct answer.

Explanation

Magnitude is a measure of the energy released at the earthquake's source and is calculated from seismograph recordings. It is a single value for an event, unlike intensity, which varies with distance and local conditions.

Question 43Responding to geographical challenges (physical processes and natural hazards)

Which sequence correctly describes the formation of a tropical cyclone?

  1. Warm ocean water evaporates, rises, condenses and releases latent heat that fuels further uplift Correct answer.
  2. Mountain ranges force moist air upward, creating a low-pressure centre at high altitude
  3. Cold ocean water sinks, compresses and warms the air above it, generating strong winds
  4. Dry air descends from the stratosphere and spins up surface winds through friction

Explanation

Tropical cyclones require sea-surface temperatures of about 26 degrees Celsius or more, so warm water evaporates and the moist air rises. Condensation aloft releases latent heat, which warms the core, lowers pressure and sustains the cyclonic circulation.

Question 44Responding to geographical challenges (physical processes and natural hazards)

A river floods after several days of steady rain across its whole catchment. Which type of flood is this?

  1. A glacial outburst flood
  2. A coastal flood
  3. A flash flood
  4. A riverine flood Correct answer.

Explanation

Riverine floods develop when sustained rainfall over a catchment raises stream levels until the channel capacity is exceeded. Because the water arrives gradually from a large area, the flood builds over hours or days rather than minutes.

Question 45Responding to geographical challenges (physical processes and natural hazards)

What is the main purpose of a levee in flood management?

  1. To slow the speed of water moving through the channel
  2. To redirect floodwater into wetlands for treatment
  3. To store floodwater in a reservoir upstream
  4. To raise the height of the channel banks so floodwater is contained Correct answer.

Explanation

Levees are raised embankments built along a channel to increase its capacity and prevent water from spilling onto the floodplain. They protect land directly but can raise flood risk downstream by confining flow.

Question 46Responding to geographical challenges (physical processes and natural hazards)

Which factor most strongly increases the risk of a slope failure on a hillside?

  1. A decrease in the height of the slope
  2. A reduction in the slope angle
  3. An increase in vegetation cover on the slope
  4. Saturation of soil with water after heavy rain Correct answer.

Explanation

Water adds weight to the soil and increases pore-water pressure, which reduces the friction holding particles together and lowers slope stability. This is why landslides often follow prolonged or intense rainfall.

Question 47Responding to geographical challenges (physical processes and natural hazards)

Which hazard is a primary effect of a volcanic eruption rather than a secondary effect?

  1. A famine caused by crop failure on ash-covered farmland
  2. A pyroclastic flow moving down the volcano's flank Correct answer.
  3. A lahar formed when ash mixes with rainwater
  4. A tsunami triggered by a flank collapse

Explanation

Primary effects occur directly and immediately during the eruption itself, and a pyroclastic flow is a direct product of the eruption. Lahars, crop failures and collapse-triggered tsunamis develop afterwards or as knock-on consequences.

Question 48Responding to geographical challenges (physical processes and natural hazards)

Which map type would best show the areas at risk of flooding along a river?

  1. A hazard map showing flood extent for a given return period Correct answer.
  2. A choropleth map of average rainfall by suburb
  3. A topographic map showing only contour lines
  4. A climate graph of monthly temperature

Explanation

A hazard map delineates the area that would be inundated for a specified event, such as a one-in-100-year flood. It allows planners to compare risk across land parcels and to set building restrictions.

Question 49Responding to geographical challenges (physical processes and natural hazards)

Why do communities on small islands in the Pacific face higher risk from tropical cyclones than many continental communities?

  1. They experience fewer cyclones but of greater intensity
  2. Their cooler ocean water intensifies cyclones more rapidly
  3. Their high elevation reduces the impact of storm surge
  4. They have limited land area and resources for evacuation and recovery Correct answer.

Explanation

Small islands have little land to move people to safety and fewer resources for rebuilding, so exposure and vulnerability are both high. Low elevation also means storm surge and waves can inundate much of the inhabited area.

Question 50Responding to geographical challenges (physical processes and natural hazards)

A coastal town builds a seawall along its beachfront. Which outcome is the most likely long-term consequence?

  1. Reduced wave energy reaching the wall during storms
  2. Reversal of longshore drift along the whole coast
  3. Increased sand deposition on the beach in front of the wall
  4. Loss of the beach as wave energy erodes sand in front of the wall Correct answer.

Explanation

Seawalls reflect wave energy, which scours sand from the beach in front of the structure and can lead to beach narrowing or loss. This is a well-documented trade-off of hard engineering approaches to coastal protection.