GEOS2111 Hazards, Climate Change and Disasters
The Complete Exam Bible · S2 2026GEOS2111 Overview
- The University of Sydney
- Semester 2, 2026
- Level 2 undergraduate unit
- School of Geosciences
- QGIS practicals and a field trip
GEOS2111 Hazards, Climate Change and Disasters is a second year School of Geosciences unit at the University of Sydney, taught jointly with the advanced stream GEOS2911. Its organising question is why the same physical event produces a catastrophe in one place and an inconvenience in another.
- Assessed by A 40 percent final written exam that is a hurdle task, a 25 percent individual GIS assignment, a 15 percent group GIS presentation, a 15 percent ministerial statement and a 5 percent early feedback test.
- The organising idea A hazard only becomes a disaster where it meets exposed people and pre existing vulnerability, so concepts come before volcanoes.
- Where the marks hide The QGIS practical stream feeds two assessments worth 40 percent between them, and it is built cumulatively from Week 2.
- Hardest habit Collecting case studies from high, middle and low income countries as you go, because one learning outcome asks for that spread and it cannot be assembled late.
- How to prepare One page per hazard: mechanism, measurement scale, secondary hazards, one named case with a date, one management response.
How GEOS2111 is assessed
| Component | Weight | Format |
|---|---|---|
| Early Feedback Task: Foundational Concepts Test | 5% | An out of class quiz sat in your own time in Week 3, 30 minutes long, due 21 August 2026 at 23:59. The Canvas assessment page describes it as multiple choice and short answer; the Week 3 resources page describes 20 multiple choice questions. Generative AI is allowed with acknowledgement. |
| GIS Practical Groupwork Presentation | 15% | A group presentation built on the QGIS practicals of Weeks 2 to 4, given in the Week 5 practical on an allocated river delta case study. The University page gives 10 to 15 minutes with the exact length to be advised; the practical materials set 10 minutes of presentation plus 5 minutes of questions, with 1.5 marks deducted per minute over time. One member submits the slides by 31 August 2026 at 23:59, and a compulsory peer assessment is submitted individually in Week 6. Generative AI is allowed with acknowledgement. |
| Ministerial Statement | 15% | An individual written communication task of 1,000 words in Week 8, due 25 September 2026 at 23:59. It asks you to write a ministerial statement on funding for the New South Wales Rural Fire Service, drawing on the Week 6 field trip to the service's state headquarters. Generative AI is allowed with acknowledgement. |
| GIS Practical Individual Assignment | 25% | An individual information flyer of 4 to 6 A4 pages with text up to 1,500 words, written for a town on Hawaii’s Big Island and built from the seven part hazard risk mapping practical run across Weeks 7 to 10. It must carry your own maps. Due in Week 12 on 30 October 2026 at 23:59. Generative AI is allowed with acknowledgement. |
| Final written exam · hurdle | 40% | A secured written exam of 90 minutes in the formal examination period, which the University schedules between 16 and 27 November. It is a hurdle task. Generative AI is prohibited in this component. |
These five components and their weights are what the University publishes on the unit of study page for the single 2026 offering, and they add to exactly 100 percent. The final written exam is the only component labelled a hurdle task, and no hurdle pass mark is stated in the unit materials available here, so confirm it on the outline. Four details differ between sources: the early feedback test has a published due date of 21 August 2026 where the assessment page gives only Week 3; it is described both as multiple choice and short answer and as 20 multiple choice questions; its scope is given as Weeks 1 to 2 in one place and Weeks 1 to 3 in three others; and one practical handout calls the group presentation 20 percent where four other sources give 15 percent. Weights come from the outline, dates from your own subject site.
Current GEOS2111 dates
| Date | Item | Control |
|---|---|---|
| 21 August 2026 | Early Feedback Task due | Out of class quiz, 30 minutes, Week 3 |
| 31 August 2026 | Group presentation slides due | Submitted before the Week 5 practical |
| 11 September 2026 | Field trip to the Rural Fire Service | Week 6, in place of the practical |
| 25 September 2026 | Ministerial statement due | Week 8, 1,000 words, 23:59 |
| 28 September to 2 October 2026 | Mid semester break | No classes |
| 30 October 2026 | Individual GIS assignment due | Week 12, 23:59 |
| 9 to 13 November 2026 | STUVAC | Study vacation before the exam period |
| 16 to 27 November 2026 | Examination period | The final written exam is scheduled in this window |
Dates are as published in the unit of study outline and the unit's own teaching pages for this offering. Confirm exact deadlines and submission settings in the live LMS.
What GEOS2111 covers
GEOS2111 runs over thirteen weeks in three modules. Weeks 1 and 2 build the conceptual vocabulary: hazard, exposure, vulnerability, resilience, risk and disaster, and the frameworks that explain why identical shaking kills thousands in one place and nobody in another.
Weeks 3 to 10 work through the hazard families one at a time, each with its physical mechanism, its measurement scale and its management response, starting with the climate related hazards and ending in space. Weeks 11 to 13 turn to detection, monitoring and disaster management, closing on Australian bushfire case studies. A QGIS practical stream runs underneath the whole unit and feeds two of the five assessments.
Core concepts in hazard and disaster studies
Hazard, risk, vulnerability, resilience and disaster as the unit defines them; the likelihood and consequence matrix; the hierarchy of controls; direct and indirect impacts; the prevention, preparedness, response and recovery cycle. (Week 1)02Frameworks for vulnerability and resilience
From Act of God to Hand of Man; the hazards paradigm against the alternative paradigm; the Pressure and Release progression of vulnerability; risk as hazard times vulnerability; the triangle of vulnerability; the MOVE framework; the Sendai Framework. (Week 2)03Weather, climate change and how the climate is measured
Weather against climate; the instrumental record and palaeoclimate proxies; radiative forcing; IPCC assessment language for confidence and likelihood; projection scenarios; extreme event attribution; why people reject the evidence. (Week 3)04Droughts and floods in a changing climate
Meteorological, agricultural, hydrological and socioeconomic drought; the Millennium Drought in southeast Australia; riverine, flash and coastal flooding; why Australian flood deaths happen in vehicles; drought and flood policy. (Week 4)05Heatwaves and bushfires in a warming climate
Defining a heatwave against a local threshold; heatwave trend metrics; the fire behaviour triangle of fuel, weather and topography; fire danger rating; marine heatwaves; the silent nature of heat mortality. (Week 5)06Tornadoes and tropical cyclones
Supercell and tornado formation; the damage scale problem; tropical cyclone structure, genesis conditions and category scales; storm surge; Australian severe thunderstorm and cyclone records; forecasting and impact based warnings. (Week 6)07Earthquakes and how they are measured
Plate boundaries and fault types; elastic rebound; focus, epicentre and seismic waves; magnitude against intensity; the logarithmic magnitude scale; liquefaction and secondary hazards; building codes and early warning. (Week 7)08Volcanic eruptions and their hazards
Where volcanoes sit relative to plate boundaries and hotspots; magma composition, viscosity and eruption style; effusive against explosive behaviour; lava flows, tephra, pyroclastic density currents and lahars; monitoring, alert levels and evacuation. (Week 8)09Tsunamis and mass movement
How a tsunami is generated, propagates and runs up; wave shoaling and inundation; warning systems and natural warning signs; falls, slides and flows; slope stability and triggering; the cascade from one hazard into another. (Week 9)10Space hazards and planetary defence
Near Earth objects, entry and impact effects; the solar wind, flares and coronal mass ejections; geomagnetic storms and grid, satellite and navigation failure; detection and warning; communicating a low probability, high consequence hazard. (Week 10)11Mapping hazard and risk with GIS
Vector and raster layers; coordinate reference systems; digital elevation models and coastal inundation; buffering, clipping and spatial joins; classification and symbology; making an honest map with legend, scale and source. (Practicals, Weeks 1 to 10)12Detecting and monitoring hazards for risk reduction
The geoscientist in detection, monitoring and mitigation; remote sensing and volunteered geographic information; data quality, currency and bias; the gaps in who gets counted; turning monitoring into a warning people act on. (Week 11)13Bushfire case studies in the Australian context
Black Saturday and the 2019 to 2020 Black Summer; the Royal Commission into National Natural Disaster Arrangements; Indigenous land and fire management; prepare, stay and defend or leave early; urban and rural differences in social vulnerability. (Weeks 12 and 13)The answer the unit builds is that a hazard only becomes a disaster when it meets exposed people and pre existing social conditions, so the unit spends its first two weeks on concepts and frameworks before it touches a single volcano.
Module 1, Weeks 1 and 2, fixes the working vocabulary of hazard, exposure, vulnerability, resilience, capacity, risk and disaster, then traces how explanation has shifted from divine punishment to physical process to political economy, and lands on the frameworks that carry that shift: the Pressure and Release progression of vulnerability, the triangle of vulnerability, the MOVE framework and the Sendai Framework for Disaster Risk Reduction.
Module 2, Weeks 3 to 10, is the hazard survey. It opens with weather, climate change and how climate is measured and projected, then takes the climate related hazards in turn, droughts and floods, heatwaves and bushfires, tornadoes and tropical cyclones, before moving to the geological ones, earthquakes, volcanoes, tsunamis and mass movement, and finishing with space hazards.
Each hazard gets the same three part treatment in the pre recorded lecture and the live lectorial: what the process is and how it is measured, what hazards follow from it, and how it is mitigated and managed, illustrated with case studies.
Module 3, Weeks 11 to 13, covers the geoscientist's role in detection, monitoring and mitigation, the data quality questions that come with geographic information for disaster risk reduction, disaster management success stories, and Australian bushfire case studies.
Running underneath all of it is a QGIS practical stream: an introduction to GIS in Week 1, coastal exposure and vulnerability mapping in Weeks 2 to 4, group presentations in Week 5, a seven part hazard risk mapping exercise on Hawaii across Weeks 7 to 10, a space weather communication scenario in Week 11 and a disaster simulation game in Week 12. Two of the five assessments come straight out of that stream.
Assessment is spread across an early feedback test, a group GIS presentation, a ministerial statement, an individual GIS assignment and a 40 percent final written exam that is a hurdle task, so the unit rewards steady weekly work and punishes leaving the exam to chance.
Running a likelihood and consequence risk assessment on a coastal storm surge
- +1Name the hazard precisely, because a vague hazard produces a vague control. The hazard is not 'bad weather'. It is inundation of the reserve by storm surge riding on a spring high tide, with wind driven waves on top. Storm surge is the process; the tide is the timing that makes it dangerous.
- +1Identify what is exposed. Exposure is the people, assets and systems in the hazard footprint: attendees on the reserve, parked vehicles, marquees and power leads, and the single low access road that also floods. Note that exposure is a property of location and timing, not of the hazard.
- +1Assess the likelihood within a stated timeframe. A forecast surge combining with a spring high tide on a known day is not a rare tail event; on the matrix used in this unit that sits at Likely rather than Possible. Always attach the timeframe, because likelihood without a window is not a probability.
- +1Assess the consequence, and here vulnerability enters. A crowd containing small children and people with limited mobility, on a site with one exit that floods first, converts a shallow inundation into a Major consequence. The same water on an empty reserve would be Minor. Consequence is a function of who is there, not only of how deep the water is.
- +1Read the cell. Likely crossed with Major gives Extreme on the matrix, which is far outside any acceptable risk band, so the assessment cannot stop at description.
- +1Apply the hierarchy of controls in order, strongest first: eliminate by moving the open day to a different date or a site above the surge level; substitute by relocating to higher ground in the same reserve; engineer by fencing the flood prone edge and raising cable runs; administer by setting a trigger time for withdrawal and briefing marshals; and only last provide personal protective measures. What remains after the chosen controls is residual risk, which must be stated, not assumed to be zero.
Key terms
- Hazard
- A process, phenomenon or human activity with the potential to kill or injure, to harm health, to damage property, to disrupt social and economic life, or to degrade the environment. The unit follows the UNDRR terminology, which classes hazards as natural, anthropogenic or socionatural in origin. Natural hazards are usually extremes of an ordinary process: too much water is a flood, too little is a drought.
- Exposure
- The people, property, systems and other assets present in a hazard zone and therefore subject to potential losses. Exposure is a property of location and timing rather than of the hazard itself, which is why the same cyclone track produces different exposure in a national park and in a coastal city.
- Vulnerability
- The physical, social, economic and environmental conditions and processes that raise how susceptible a person, a community, an asset or a system is to the impacts of a hazard. It is a pre existing condition, present before the hazard arrives, and it explains why identical shaking or identical rainfall produces very different losses in different places.
- Adaptive capacity
- The ability of a system or community to adjust to change, moderate potential damage, take advantage of opportunities and cope with the consequences. It sits alongside vulnerability and resilience in the trio the unit uses to explain why losses occur or do not occur in a particular context.
- Resilience
- The capacity of an exposed system, community or society to resist a shock, absorb it, accommodate and adapt to it, transform where transformation is needed, and then recover promptly and efficiently, including by preserving and restoring the structures and functions it depends on. The unit treats it as a contested concept rather than a settled one, and expects you to say resilience for whom and to what.
- Risk
- The potential loss of life, injury, or damaged and destroyed assets that could occur to a system, society or community within a stated period, determined probabilistically from hazard, exposure, vulnerability and capacity. The compact teaching form used in the unit is risk equals hazard times vulnerability.
- Residual risk
- The risk that remains after controls have been applied. Naming it is a required step in a risk assessment: a control programme reduces risk, it does not drive it to zero, and pretending otherwise is how open days and field trips go wrong.
- Hierarchy of controls
- An ordered set of risk treatments applied strongest first: elimination, substitution, engineering controls, administrative controls and finally protective equipment. The order matters because only elimination removes the hazard; everything below it manages exposure or consequence and leaves residual risk.
- Disaster
- Quoted from UNDRR terminology (2017), which is the wording this unit uses: “a serious disruption of the functioning of a community or a society at any scale due to hazardous events interacting with conditions of exposure, vulnerability and capacity, leading to human, material, economic or environmental losses and impacts.” The definition is deliberately social: without disrupted people there is a hazard but no disaster.
- Disaster risk reduction
- The policy aim behind disaster management: to prevent new risk, reduce the risk that already exists, and manage whatever remains, in order to strengthen resilience and support sustainable development. It is the frame the Sendai Framework works within and the answer to the question of what to do once risk has been assessed.
- Pressure and Release model
- A framework that traces disaster back through three linked layers of social causation: root causes such as limited access to power, structures and resources; dynamic pressures such as rapid urbanisation, deforestation or lack of local institutions; and unsafe conditions such as dangerous locations and unprotected buildings. Pressure builds from the left and meets the hazard, and release means acting on the causes rather than the symptoms.
- Indirect impact
- An effect that appears later because of a direct effect, such as homelessness following the destruction of housing, unemployment following the destruction of workplaces, or illness following displacement and stress. Indirect impacts often exceed direct impacts in total cost and are the part of the ledger that recovery planning most often underestimates.
GEOS2111 FAQ
What does this unit actually cover, week by week?
The unit is built in three modules across thirteen weeks. Weeks 1 and 2 are foundational: the working definitions of hazard, exposure, vulnerability, resilience, capacity, risk and disaster, then the history of how disasters have been explained and the frameworks that carry the modern explanation, including the Pressure and Release progression of vulnerability and the Sendai Framework.
Weeks 3 to 10 are a survey of hazard families, one per week, each treated the same way: the physical process and how it is measured in the pre recorded lecture, then mitigation, management and case studies in the live lectorial. The order is weather and climate change, droughts and floods, heatwaves and bushfires, tornadoes and tropical cyclones, earthquakes, volcanoes, tsunamis and mass movement, and space hazards.
Weeks 11 to 13 turn to the geoscientist's role in detection and monitoring, geographic data for disaster risk reduction, disaster management success stories, Australian bushfire case studies and the Australian hazard context. Alongside all of it runs a QGIS practical stream that starts with basic GIS concepts and ends with a seven part hazard risk mapping exercise.
How is the mark made up, and what does the hurdle mean?
Five components. An early feedback Foundational Concepts Test worth 5 percent in Week 3, a GIS practical group presentation worth 15 percent in Week 5, a ministerial statement of 1,000 words worth 15 percent in Week 8, an individual GIS assignment worth 25 percent in Week 12, and a final written exam worth 40 percent in the formal examination period. They add to 100 percent.
The University labels the final exam a hurdle task, which means it is not enough to reach a passing total: your performance on that paper is separately required to pass the unit. The unit materials available here do not state the hurdle percentage, so check the exact pass rule on the unit of study outline for your cohort.
Practically the hurdle changes how you should budget the semester, because 60 percent of the mark is earned in coursework you can plan for, while the remaining 40 percent is a single sitting that can end the unit on its own.
What is the final exam like, and how should I prepare for it?
It is a secured written exam of 90 minutes, sat in the formal examination period, which the weekly schedule places between 16 and 27 November. Generative AI is prohibited in this component, unlike the four coursework tasks. Ninety minutes is short for a unit covering ten hazard families, which tells you what the paper cannot do: it cannot ask for long essays on every hazard.
The unit describes the examinable scope as all course content across the nine learning outcomes, but it does not publish question types, a section structure, a mark allocation or a list of permitted materials, so do not plan around an assumed format. Prepare for breadth and recall rather than depth on one topic.
The most efficient revision object is a one page card per hazard carrying four things: the physical mechanism in one sentence, the measurement scale and what it actually measures, the characteristic secondary hazards, and one named case study with a country and a date.
Then rehearse the cross cutting moves, because the learning outcomes ask you to connect concepts across hazards: vulnerability and resilience determining losses, the climate change link for hydro meteorological hazards, and examples drawn from high, middle and low income countries.
How much GIS does the unit expect, and do I need software experience first?
A good deal, and no. The practicals use QGIS, which is open access and free, and the unit teaches it from the beginning: Week 1 has no practical class but provides pre recorded material on basic GIS concepts, and Weeks 2 to 4 build a map from scratch and use it to explore exposure and vulnerability to coastal hazards. That work becomes the Week 5 group presentation worth 15 percent.
From Week 7 the practicals become a seven part hazard risk mapping exercise on Hawaii, spread across four sessions to Week 10, and that becomes the individual assignment worth 25 percent. So 40 percent of the unit mark comes out of the practical stream.
The practical skill being assessed is not software fluency for its own sake but spatial reasoning: choosing layers that answer a hazard question, handling a digital elevation model honestly, and producing a map a non specialist can read.
What is a ministerial statement, and how is it different from an essay?
It is a short written communication task of 1,000 words, due in Week 8, that asks you to write for a decision maker rather than for a marker. In this unit the subject is funding for the New South Wales Rural Fire Service, and the evidence comes from the Week 6 field trip to the service's state headquarters, which is why the unit tells you to start the task before you go rather than after.
The difference from an essay is real and it is where marks are usually lost. An essay can spend its opening establishing context and can leave its judgement to the conclusion. A statement written for a minister has to name the decision required in its first lines, because the reader may stop there.
It also has to be defensible under a hostile question, so it works best when it bounds one clearly defined need rather than surveying several, says what the agency already does about that need so the gap is genuine, proposes one coherent initiative with a concrete deliverable, names who benefits and who else must be involved, admits at least one risk or unintended consequence, says how anyone would know the initiative worked, and flags what evidence is still missing.
The teaching materials frame a good brief as short, concise, clear, reliable and readable, and reliability there explicitly includes flagging what you do not know.
What does the early feedback test cover and how does it work?
It is worth 5 percent and is sat in your own time in Week 3, taking 30 minutes, with the University publishing a due date of 21 August 2026. Generative AI is allowed with acknowledgement.
The materials describe it in two ways that do not quite agree: the Canvas assessment page calls it multiple choice and short answer questions on Module 1 content, while the Week 3 resources page describes 20 multiple choice questions covering Weeks 1 to 3 lectures and lectorials.
Prepare for the wider of the two, which means the core concept definitions from Week 1, the paradigm shift and frameworks from Week 2, and the weather and climate change material from Week 3. Its purpose is diagnostic: it is deliberately placed early so that a weak result arrives while there is still a semester left to act on it.
Is this a maths heavy unit?
No. There is no calculation stream and the unit assumes no prior knowledge, although it does build on junior geoscience units.
What it does demand is comfort with quantities: reading a magnitude scale and understanding that a logarithmic scale means one step is not one unit of energy, interpreting a probability given as a likelihood band, reading a hazard map with a classified legend, and handling elevation data in the GIS practicals. The written work is argument rather than arithmetic.
The place where numerical care actually pays is precision about what a number describes, for instance the difference between a magnitude that measures the earthquake and an intensity that measures the shaking at a place, or between a heatwave defined against an absolute temperature and one defined against a local percentile.
How do I build case study evidence across high, middle and low income countries?
Deliberately, and from Week 1, because one of the stated learning outcomes asks for exactly that spread and it is the easiest outcome to miss by accident. The unit hands you high income cases constantly, since Australian bushfire, flood, drought and heatwave material is everywhere in the teaching.
The gap that opens up is middle and low income evidence, so collect it as you go rather than searching in the revision week: the cyclone warning and evacuation record in Bangladesh, disaster losses and recovery in the Philippines, and the way earthquake losses in different countries diverge for the same magnitude.
A workable habit is a single running table with one row per case: country, hazard, date, what happened, and which concept the case illustrates best. Two or three well specified cases used precisely beat a dozen mentioned in passing.
How to study for the exam
Treat GEOS2111 as two units running in parallel and plan for both. The concept and hazard stream is assessed by the early feedback test and the exam, and rewards a small, disciplined set of notes built weekly. The GIS stream is assessed by the group presentation and the individual assignment, together 40 percent, and rewards work in the practical class rather than after it.
For the concept stream, build one page per hazard from Week 3 onward and never let it grow past a page: mechanism in a sentence, the measurement scale and what it truly measures, the secondary hazards that follow, one named case with country and date, and one management response.
Ten of those pages are the whole of Module 2. For Weeks 1 and 2, keep instead a single sheet of definitions with the frameworks drawn as diagrams, because the conceptual vocabulary is what the later weeks are graded against and it is what the early feedback test checks.
For the GIS stream, finish each practical inside the class or the same day, save the project file with its layers intact, and write two lines about what the map showed while you still remember; the individual assignment is assembled from seven practical parts and reconstructing part three in Week 11 is miserable. Two habits do disproportionate work.
First, whenever the teaching gives you a physical process, immediately ask who is exposed and which pre existing conditions turn that process into losses, because the unit's learning outcomes are written in exactly that shape. Second, keep a running case study table with a deliberate spread of high, middle and low income countries, since one outcome asks for that range and it cannot be manufactured in the revision week.
Going into the exam, remember it is only 90 minutes across ten hazard families, so rehearse fast, structured recall rather than long form essays.
Your AI Environmental Science tutor for GEOS2111
Stuck on a hard GEOS2111 question? Sia is AskSia’s AI Environmental Science tutor — ask any GEOS2111 Hazards, Climate Change and Disasters question and get a clear, step-by-step explanation grounded in how the course is actually taught and assessed. Read this whole study guide free, then take your hardest questions to Sia.
