Study the shared core once, then weight it two ways: the FG spreads items nearly evenly across eight domains, while the PG concentrates on hydrogeology, engineering geology, and resources, and asks you to plan investigations and make recommendations rather than identify facts. Use blueprint-weighted quizzes, worked scenarios, and a recall-versus-task error log to train both framings.
Why One Identical Study Plan Fits FG and PG Poorly
The two blueprints weight the same domains very differently. Mineralogy is 12 percent of the FG but 5 percent of the PG, while hydrogeology rises from 13 to 22 percent and engineering geology from 12 to 18 percent.
On the FG, the 2023 blueprint spreads 140 items across all eight domains: general geology and geological investigations lead at 17 percent, followed by geomorphology at 14, hydrogeology at 13, mineralogy/petrology/geochemistry, structure/tectonics/seismology, and engineering geology at 12 each, sedimentology/stratigraphy/paleontology at 11, and mineral and energy resources at 9. For the FG, thin coverage anywhere is expensive; skipping mineralogy to drill hydrogeology trades a 12-percent domain for a 13-percent one and gains almost nothing.
The PG blueprint concentrates 110 items: hydrogeology alone is 22 percent, engineering geology 18, mineral and energy resources 16, and general geology 17 — roughly three-quarters of the test in four domains — while mineralogy and the sedimentology domain drop to 5 percent each. The same notes serve both exams, but the schedule cannot: FG study runs nearly uniform across domains, PG study runs lopsided. The table below is the weighting map for a combined plan.
| Domain | FG weight | PG weight | Combined-study priority |
|---|---|---|---|
| General geology and geological investigations | 17% | 17% | High on both — shared core |
| Mineralogy, petrology, and geochemistry | 12% | 5% | FG-weighted |
| Sedimentology, stratigraphy, and paleontology | 11% | 5% | FG-weighted |
| Geomorphology and surficial processes | 14% | 8% | FG-tilted |
| Structure, tectonics, and seismology | 12% | 9% | Balanced |
| Hydrogeology | 13% | 22% | PG-weighted |
| Engineering geology | 12% | 18% | PG-weighted |
| Mineral and energy resources | 9% | 16% | PG-weighted |
Task Framing: From 'Identify' to 'Plan and Conduct'
FG tasks largely ask you to identify, classify, and interpret data. PG tasks add planning investigations with public welfare, regulations, and QA/QC in mind, plus producing recommendations — a different answer format, not just harder geology.
Compare the verbs. FG tasks read 'identify minerals and rocks and their characteristics,' 'determine positions, scales, distances, and elevations,' 'identify and interpret sedimentary processes and structures.' PG tasks read 'plan and conduct geological investigations considering public health, safety, and welfare, the environment, regulations, and QA/QC,' 'design groundwater monitoring, observation, extraction, production, or injection wells,' and 'develop plans, interpretations, and recommendations for ground behavior.' Same geology, different deliverable: the PG wants a defensible professional decision, not a recognized fact.
Train the conversion deliberately. Take one note-card topic — say, karst terrain — and write both versions: an FG item ('identify the landform and the process forming this feature') and a PG item ('a subdivision is proposed near a sinkhole; what do you evaluate and recommend?'). Answering only the first version leaves you fluent in recognition but slow at justification. For every major topic in your notes, force one recommendation sentence with an explicit basis before you move on.
Scenario: An Aquifer-Yield Question Answered Like a Definition
A PG hydrogeology item expects a professional decision with justification; reciting the definition of storage coefficient or hydraulic conductivity earns nothing. Work the scenario below and compare the definition-first mistake with the decision-first answer.
Worked scenario (simplified teaching example): a sand-and-gravel aquifer with transmissivity of 1,500 m²/day supplies a town whose demand is projected to double; the PG-style item asks what should be evaluated to judge whether the supply is sustainable. A plausible mistake is to pick the option that correctly defines storage coefficient — a true statement, but it answers a definition prompt, not an investigation-planning prompt. The stronger answer identifies what data and analysis the decision actually needs.
The better choice names the method and the decision: a constant-rate pumping test with observation wells to detect boundary effects, an evaluation of recharge and interference between wells, and a conclusion about sustainable yield. Why it matters: this mirrors the blueprint tasks 'evaluate water resources, assess aquifer yield, and determine sustainability' — the PG measures whether you can plan an investigation and defend a conclusion, so an answer lacking data, method, and decision is incomplete even when every term is used correctly.
Scenario: A Slope-Stability Answer That Names the Hazard but No Action
PG engineering geology tasks ask for recommendations for engineering design, land-use decisions, and hazard mitigation. Naming a landslide type correctly still misses the point if the answer never states what should be done at the site.
Worked scenario (paper exercise): a cross-section shows colluvium over weathered bedrock on a steep slope, with springs breaking out mid-slope and old scarps upslope; the item asks the most appropriate course of action before designing a road cut. A plausible mistake is to select 'debris slide' — a correct identification that answers an FG-style prompt and stops short of the PG deliverable. Identification is necessary but not sufficient here; the task asks what you would do.
The better answer is a recommendation: investigate colluvium thickness and pore-water pressures at the spring line with borings and piezometers, control drainage, and set the cut back or redesign the slope before finalizing the alignment. Why it matters: it maps to the PG tasks on evaluating geologic hazards and on 'plans, interpretations, and recommendations for ground behavior during infrastructure development.' Note that exam items are judged within their own simplified facts; real projects demand site-specific, qualified investigation.
Building the Shared Core Both Exams Draw On
General geology and field-methods tasks carry 17 percent on both tests, and structure, sedimentology, and geomorphology appear substantially on each. Study these once, deeply, and annotate every note with how each concept would be asked on each exam.
The overlap is unusually large. The general-geology domain carries 17 percent on both tests, and its tasks — compiling existing information, recording field data, determining positions and elevations from maps, imagery, surveys, and GIS, and preparing logs, sections, and maps — appear nearly verbatim on each blueprint. Structural projection and cross-section construction, relative age relationships, stratigraphic correlation, and landform interpretation all serve both exams. Build these skills once, in depth, and they pay twice.
Then split the edges. FG-weighted domains (mineralogy and geochemistry at 12 versus 5 percent, sedimentology at 11 versus 5) respond well to flashcards, classification reasoning, and alteration or association drills. PG-weighted material (well design, contaminant fate and transport, reserve calculation, reclamation and closure) responds to scenario writing. In an adaptable plan, a strong field-mapping background lets you compress the shared-core weeks, while a water-resources background lets you compress the PG-domain weeks — adjust, don't just add hours.
A Self-Check Routine With Expected Observations
Run weekly domain-weighted self-quizzes: sample practice items in proportion to each blueprint, log errors by domain and by task type, and apply the rubric below. Scores here are learning milestones, not predictions of your result.
Practical exercise: build two 20-item quizzes from any practice material you have. Weight the FG quiz roughly to its blueprint — about three to four items per domain — and the PG quiz with four to five hydrogeology items, four engineering geology, and three resources. After each quiz, tag every miss as 'recall' (you lacked the fact) or 'task' (you knew the geology but misread the ask). Log both tags against the domain.
Expected observations after three or four rounds: recall misses cluster in the FG-weighted domains such as mineralogy or stratigraphy, while task misses cluster in PG hydrogeology and engineering items. That pattern tells you which fix to apply — content review for recall misses, question-framing drills for task misses. Use the rubric below as weekly milestones; a domain that repeats on your error log across three quizzes moves to the front of the next week's plan.
- Recall accuracy of roughly 70 percent or better in every FG domain before shifting emphasis toward PG scenarios.
- Task-tagged misses under a third of all misses by mid-plan; a higher share means rework question framing, not content.
- Every scenario answer names data, method, and a recommendation; any missing element marks the answer not PG-complete.
- A shrinking error log week over week; domains disappearing from the log signal the weighting plan is working.
An Adaptable Sequence and Final Readiness Checks
Sequence content first, then weighting, then task framing: build the shared core early, add FG-weighted and PG-weighted domain drills mid-plan, and finish with mixed, blueprint-weighted quizzes plus scenario writing under timed conditions.
A workable sequence: weeks one to four, the shared core plus FG-weighted domains (mineralogy, sedimentology, geomorphology) through flashcards and map and cross-section practice; weeks five to eight, PG-weighted domains (hydrogeology, engineering geology, resources) through scenario writing and well-design or reserve-calculation drills; weeks nine onward, mixed quizzes weighted to each blueprint, error-log review, and timed dual sets. Compress whichever block your background already covers well and reinvest that time in the other.
Readiness checks before exam day: you can sketch both blueprints' domain percentages from memory and explain how your schedule reflected them; you can convert any fact in your notes into both an identify-question and a recommend-question with answers; your last two weighted quizzes show misses split between recall and task tags rather than one dominating; and your scenario answers consistently contain data, method, and decision. For eligibility, scheduling, and fees, go directly to ASBOG and your state board.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.