ENV 100 Shaping Planet Earth
The Complete Study & Assessment Guide · S2 2026ENV 100 Overview
- Semester 2, 2026
- University of Auckland
- Level 1
- Coursework-only assessment
- Earth system science
ENV 100 Shaping Planet Earth introduces first-year Earth Science and physical geography through a connected story of planetary change. The course begins with Earth systems and cycles, including water, carbon, rock, orbital forcing, and sea-level controls.
- Assessment shape Laboratories carry half of the grade; tests, quizzes, and the field trip make up the remainder.
- Test method Practise short causal writing and labelled process diagrams alongside multiple-choice retrieval.
- Core lens Connect driver, process, evidence, consequence, scale, and uncertainty.
- Data habit Check units, axes, model fit, and the boundary of every claim.
How ENV 100 is assessed
| Component | Weight | Format |
|---|---|---|
| Lab 1: Observation | 10% | Pre-lab 2%, in-person work 4%, post-lab 4%; use the Canvas calendar for stream deadlines |
| Lab 2: Experiment | 10% | Pre-lab 2%, in-person work 4%, post-lab 4%; use the Canvas calendar for stream deadlines |
| Lab 3: Data | 10% | Pre-lab 2%, in-person work 4%, post-lab 4%; use the Canvas calendar for stream deadlines |
| Lab 4: Analysis | 10% | Pre-lab 2% plus an 8% analysis assignment |
| Lab 5: Communication | 10% | Pre-lab 2% plus an 8% communication assignment |
| In-class test 1 | 10% | Closed book and on paper; 25 minutes with 10 multiple-choice questions, a written response, and a diagram |
| In-class test 2 | 10% | Closed book and on paper; 25 minutes with 10 multiple-choice questions, a written response, and a diagram |
| Quiz 1: Earth's Cycles | 5% | Open-book Canvas quiz; 20 minutes with multiple-choice and drag-and-drop questions |
| Quiz 2: Cataclysmic beginnings & Impacts of Global Tectonics | 5% | Open-book Canvas quiz; 20 minutes with multiple-choice and drag-and-drop questions |
| Quiz 3: Resurfacing | 5% | Open-book Canvas quiz; 20 minutes with multiple-choice and drag-and-drop questions |
| Quiz 4: Unprecedented Changes | 5% | Open-book Canvas quiz; 20 minutes with multiple-choice and drag-and-drop questions |
| Field Trip | 10% | Assessed worksheet completed during the Maukatia Bay and Muriwai field trip |
The current University materials publish all weights above. Laboratory stream deadlines can differ, so the student's Canvas calendar is the operational source for submission times.
What ENV 100 covers
Follow connected Earth systems from cycles and planetary formation through tectonics, oceans, coasts, hazards, human change, mineral supply, energy choices, and scientific inquiry.
Earth Systems and Interlocking Cycles
Water, carbon, rock, orbital forcing, sea level, reservoirs, transfers, and feedbacksThis chapter treats the atmosphere, hydrosphere, biosphere, and geosphere as connected reservoirs.
- Earth-system spheres and reservoirs
- Water-cycle drivers and pathways
- Fast and slow carbon cycles
- Rock-cycle transformations
- Milankovitch forcing and sea level
- Human acceleration of transfers
Planet Formation and Internal Structure
Accretion, differentiation, layered Earth, seismic evidence, density, magnetic field, and impactsThis chapter explains how accretion, heating, and differentiation produced a layered planet.
- Accretion and early heating
- Planetary differentiation
- Crust, mantle, and cores
- Seismic-wave evidence
- Mean-density reasoning
- Impacts and crater traces
Plate Tectonics and Global Impacts
Divergent, convergent, and transform boundaries, hazards, mountains, ocean basins, and climate linksThis chapter compares divergent, convergent, and transform boundaries through relative motion, landforms, earthquake depth, volcanism, and ocean-basin structure.
- Plate motion and mantle context
- Divergent ridges and rifts
- Subduction and volcanic arcs
- Transform faults
- Earthquake depth patterns
- Mountains, oceans, and climate
Ocean Circulation and Tides
Wind driven currents, Ekman transport, overturning, tidal forcing, cycles, and coastal responseThis chapter joins wind stress, rotation, basin geometry, temperature, salinity, and density into a circulation model. Surface currents, Ekman transport, upwelling, western boundary currents, and deep overturning redistribute heat.
- Wind-driven surface currents
- Coriolis effect
- Ekman transport and upwelling
- Thermohaline circulation
- Equilibrium tide model
- Spring-neap and distance cycles
Waves, Sediment, and Coastal Change
Wave transformation, nearshore circulation, longshore drift, beach profiles, erosion, and field evidenceThis chapter follows wave energy from deep water to breaking at the shore, then tracks sediment through swash, backwash, rip currents, longshore currents, and bed return flow. Beach change is interpreted as movement within a coastal cell.
- Wind waves and swell
- Deep and shallow water
- Refraction and diffraction
- Nearshore circulation
- Longshore and cross-shore transport
- Beach profiles and erosion
Asteroids, Glaciations, and Surface Change
Weathering, erosion, transport, deposition, lithification, impact traces, ice sheets, and landformsThis chapter treats impacts and glaciations as different triggers for a common resurfacing chain: weathering, erosion, transport, deposition, compaction, cementation, and lithification.
- Resurfacing process chain
- Impact disturbance and traces
- Clastic sedimentary rocks
- Graded bedding
- Ice-sheet erosion and deposition
- Isostatic loading and rebound
Volcanoes, Earthquakes, and Sediment
Ashfall, pyroclastic flows, isopachs, landslides, river adjustment, and event depositsThis chapter follows eruption and earthquake disturbances into sediment systems.
- Eruption columns and ashfall
- Pyroclastic density currents
- Isopach maps
- Ignimbrite and tephra
- Earthquake landslides
- River and submarine response
The Anthropocene and Human Responses
Holocene change, human influence, formal time, erosion, subsidence, restoration, and evidenceThis chapter separates the Anthropocene as a useful descriptive concept from formal geological time.
- Holocene environmental change
- Hominid migration and impacts
- Anthropocene concept and status
- Radiocarbon chronology
- Erosion and subsidence
- Restoration and management
Mineral Resources and Sustainable Supply
Ore settings, extraction, circularity, reclamation, carbon removal, reservoirs, seals, and monitoringThis chapter connects critical minerals with the geological processes that concentrate them in magmatic, pegmatitic, vein, sedimentary, and weathering settings.
- Critical-mineral demand
- Geological deposit settings
- Mining waste and tailings
- Reclamation and remining
- Circular material flows
- Carbon removal and storage
Energy Resources and Future Choices
Coal, oil, gas, geothermal systems, geological controls, life cycle boundaries, and transition trade-offsThis chapter compares the geological chains behind coal, oil and gas, and geothermal energy. Formation, burial, maturation, migration, reservoir, seal, heat, fractures, fluid circulation, and reinjection determine what is available.
- Coal formation and rank
- Petroleum systems
- Reservoirs and seals
- Geothermal heat and permeability
- Production and reinjection
- Energy-transition trade-offs
Earth Science Inquiry and Communication
Observation, experiment design, data, plots, classification, uncertainty, and audience-first communicationThis chapter unifies the five laboratory skills: observation, experiment, data, analysis, and communication. It turns field notes into measurements, plots, models, classifications, and audience-first explanations.
- Observation and inference
- Experimental controls
- Data quality and units
- Scatter plots and trendlines
- Beach-state classification
- Audience-first communication
It then asks how a differentiated planet formed, how seismic evidence reveals the interior, and how plate motion creates ocean basins, mountains, earthquakes, volcanoes, and long-term climate effects. The Blue Planet block connects wind-driven circulation, density-driven overturning, tides, waves, sediment transport, and coastal landforms.
Resurfacing chapters use asteroid impacts, glaciations, supervolcanoes, earthquakes, weathering, erosion, transport, and deposition to show how sudden events become long geological records. Later material evaluates the Anthropocene as a descriptive concept, human impacts on Earth systems, restoration choices, critical minerals, carbon storage, and the geology of coal, hydrocarbons, and geothermal energy.
Five linked laboratories develop observation, experiment design, data handling, analysis, and communication. The practical emphasis matters: this course is assessed entirely through coursework, and the tests include both written explanation and a labelled diagram. Use this guide to move beyond lists of keywords.
For every topic, identify the system boundary, trace the mechanism with directional verbs, point to an observation or measurement that supports the interpretation, and state the scale or limitation that prevents overclaiming.
Worked example · free
Explain linked causes of relative sea-level rise
- +1Define relative sea level as the height of water compared with the local land surface.
- +1Warmer seawater expands, increasing ocean volume without requiring a transfer from land.
- +1Melting land ice transfers stored water to the ocean and increases ocean mass.
- +1Subsidence lowers the land reference surface, amplifying local relative rise.
Key terms
- Earth system
- The interacting atmosphere, hydrosphere, biosphere, and geosphere through which matter and energy move.
- Reservoir
- A place where matter is stored within a cycle, such as the ocean, atmosphere, soil, or rock.
- Flux
- A rate of transfer between reservoirs through a named physical, chemical, or biological process.
- Differentiation
- The separation of a planetary body into layers because materials with different properties moved under gravity.
- Subduction
- The descent of one tectonic plate beneath another at a convergent boundary.
- Ekman transport
- The net movement of the wind-driven ocean surface layer at an angle to the wind because of rotation and friction.
- Tidal range
- The vertical difference between a high tide and the following low tide.
- Longshore drift
- Net movement of coastal sediment produced by oblique swash and downslope backwash.
- Lithification
- Compaction and cementation that transform deposited sediment into sedimentary rock.
- Isopach map
- A map joining locations where a deposit has equal thickness.
- Anthropocene
- A descriptive concept for the period of strong planetary human influence; it is not a formally adopted epoch.
- Dimensionless fall velocity
- A beach-state parameter combining wave height, wave period, and sediment settling velocity without retaining units.
ENV 100 FAQ
How is this course assessed?
The published structure is entirely coursework: five laboratories total 50%, two in-class tests total 20%, four Canvas quizzes total 20%, and the field-trip worksheet is 10%. Laboratory attendance and submission conditions matter for receiving component credit.
What is the in-class test format?
Each in-class test is a 25-minute, closed-book paper task held during lecture time. It contains 10 multiple-choice questions plus two longer questions: one written explanation and one labelled diagram response based on the lecture focusing questions and keywords.
What do the five laboratories develop?
The sequence moves through observation, experiment, data, analysis, and communication. Together the tasks build the ability to collect Earth science evidence, organise measurements, evaluate patterns and model limits, and communicate a defensible conclusion to a defined audience.
What should I prepare for the field trip?
Prepare to connect coastal processes with direct observations at Maukatia Bay and Muriwai Beach. Review waves, sediment transport, beach profiles, volcanic and sedimentary history, and the difference between an observation, a measurement, and an interpretation before attending.
What makes this course demanding?
The source supports a workload and assessment picture rather than a difficulty rating. The pressure comes from cumulative vocabulary, short test timing, required laboratory participation, diagrams, and data interpretation. Weekly retrieval and process sketches reduce the need for last-minute memorisation.
How much mathematics is used?
The course includes real quantitative work such as density, tidal range, unit conversion, scatter plots, trendlines, R-squared, grain-size measures, and a dimensionless beach-state parameter. The main skill is choosing units and interpreting a relationship, not performing advanced mathematics.
Can AI be used in ENV 100 coursework?
The course classifies tasks as controlled or uncontrolled. AI use is not permitted in controlled work unless express permission is given; uncontrolled tasks may allow responsible use. Follow the instruction for the specific activity because permission does not transfer between tasks.
Questions students ask in each ENV 100 chapter
- Why do Earth cycles need different time scales?
- Processes that look connected can operate over hours, seasons, orbital intervals, or tectonic periods. Naming the scale prevents a rapid human transfer from being balanced incorrectly against a much slower geological sink. Chapter 01 · Earth Systems and Interlocking Cycles
- How can scientists study Earth's deep interior?
- They combine seismic travel paths, wave speeds, missing wave phases, planetary mass and volume, magnetic behaviour, heat flow, and meteorite composition. Agreement among independent observations makes the layered interpretation robust. Chapter 02 · Planet Formation and Internal Structure
- How does earthquake depth identify a boundary?
- Shallow earthquakes occur in several settings, but a landward-deepening plane of hypocentres is strong evidence for a descending slab. It should be checked against trenches, motion vectors, and volcanic position. Chapter 03 · Plate Tectonics and Global Impacts
- What drives surface ocean currents?
- Wind supplies momentum, while rotation turns the flow and continents redirect it around basins. Friction and pressure gradients also matter, so a current is not a simple copy of the wind direction. Chapter 04 · Ocean Circulation and Tides
- When does a wave feel the seabed?
- As water depth becomes small relative to wavelength, orbital motion interacts with the bed. The wave slows, wavelength shortens, height may grow, and breaking becomes likely. Chapter 05 · Waves, Sediment, and Coastal Change
- What evidence can indicate an impact?
- Crater form, shocked or melted material, unusual density contrasts, ejecta, and correlated sediment layers can converge on an impact interpretation. A single unusual layer is not sufficient by itself. Chapter 06 · Asteroids, Glaciations, and Surface Change
- How can ashfall and pyroclastic-flow deposits differ?
- Ashfall commonly blankets topography and thins away from the source, while a density current follows relief and can form thick valley fills. Texture and internal structures provide additional checks. Chapter 07 · Volcanoes, Earthquakes, and Sediment
- Is the Anthropocene a formal epoch?
- The course treats it as a descriptive concept for accelerating human influence. The 2024 formalisation proposal was rejected, so concept use and formal chronostratigraphic status must be stated separately. Chapter 08 · The Anthropocene and Human Responses
- Why are mineral deposits geographically uneven?
- Concentration requires particular magmatic, hydrothermal, sedimentary, metamorphic, or weathering processes. Most crust contains useful elements at levels too low or dispersed for economically practical extraction. Chapter 09 · Mineral Resources and Sustainable Supply
- Why is sedimentary geology important for fossil fuels?
- Organic-rich source material, burial history, migration pathways, porous reservoir rock, and an effective seal must align. The presence of sedimentary rock alone does not establish a petroleum system. Chapter 10 · Energy Resources and Future Choices
- What is the difference between observation and inference?
- An observation records what was seen or measured. An inference proposes the process or history that explains it. Keeping them separate makes it possible to test alternative interpretations. Chapter 11 · Earth Science Inquiry and Communication
How to prepare for the assessments
Build a weekly retrieval loop around the official focusing questions and keywords. Before class, preview the question set and identify the process diagram you expect to need. After class, close the notes and produce a one-page explanation containing the system boundary, driver, process, evidence, consequence, scale, and one limitation.
For tests, practise 10 rapid recognition questions followed by one compact causal paragraph and one labelled diagram inside 25 minutes. For laboratories, keep observations separate from interpretations, record units at collection time, and write captions that state the relationship rather than naming the picture.
Recheck every conversion before using a formula, and interpret R-squared as model fit rather than proof of causation. Use field and laboratory feedback immediately: turn each missed relationship into a fresh practice prompt, then revisit it two days later and again at the end of the week. For controlled tasks, follow the course rule and do not use AI unless the course director has given express permission for that task.
