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100+ Free Cameroon GCE A-Level Geology Practice Questions

Prepare for the Cameroon General Certificate of Education Advanced Level Geology (Subject Code 0755) exam with instant access — no signup required.

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44.09% pass rate in the June 2026 session (Cameroon GCE Board, Performance by Subjects, results released 21 August 2026) Pass Rate
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Key Facts: Cameroon GCE A-Level Geology Exam

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The Cameroon GCE A-Level Geology (0755) is an advanced Earth Sciences examination administered by the Cameroon GCE Board in Buea. Comprising 3 papers (Paper 1 MCQ, Paper 2 Theory, Paper 3 Practical), it tests crystallography, mineralogy, igneous/sedimentary/metamorphic petrology, structural geology, plate tectonics, Cameroon regional geology, palaeontology, hydrogeology, economic geology, and 3D mapwork. This bank delivers 100 comprehensive practice MCQs with step-by-step solutions.

Sample Cameroon GCE A-Level Geology Practice Questions

Try these sample questions to test your Cameroon GCE A-Level Geology exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following defines the crystallographic axial lengths and interaxial angles of the Tetragonal crystal system?
A.a = b = c, α = β = γ = 90°
B.a = b ≠ c, α = β = γ = 90°
C.a ≠ b ≠ c, α = β = γ = 90°
D.a = b ≠ c, α = β = 90°, γ = 120°
Explanation: The Tetragonal crystal system is characterized by two equal horizontal axes and one unequal vertical axis (a = b ≠ c), with all three axes intersecting mutually at right angles (α = β = γ = 90°). Examples of minerals crystallizing in this system include zircon, rutile, and chalcopyrite.
2A crystal face cuts the crystallographic a-axis at 1 unit, the b-axis at 2 units, and is parallel to the c-axis (intercept at ∞). What are the Miller indices (hkl) for this face?
A.(120)
B.(210)
C.(121)
D.(21∞)
Explanation: To determine Miller indices from Weiss intercepts (1a, 2b, ∞c): first take the reciprocals of the intercepts (1/1, 1/2, 1/∞ = 1, 1/2, 0), then clear fractions by multiplying by the lowest common denominator (2), yielding the integer indices (210). Miller indices must always be integers enclosed in parentheses without infinity symbols.
3How many planes of symmetry, axes of symmetry, and centers of symmetry are present in the normal class of the Isometric (Cubic) crystal system (Galena type)?
A.3 planes, 3 axes, 1 center
B.6 planes, 9 axes, 0 center
C.9 planes, 13 axes, 1 center
D.12 planes, 13 axes, 1 center
Explanation: The normal/holohedral class of the cubic system (m3m or 4/m 3 2/m) possesses the highest symmetry among crystals: 9 planes of symmetry (3 axial and 6 diagonal), 13 axes of symmetry (3 four-fold, 4 three-fold, and 6 two-fold axes), and 1 center of symmetry.
4Which of the following correctly arranges the index minerals of the Mohs scale of hardness in order of increasing hardness?
A.Gypsum → Calcite → Fluorite → Apatite → Orthoclase → Quartz
B.Talc → Calcite → Gypsum → Fluorite → Quartz → Topaz
C.Gypsum → Fluorite → Calcite → Orthoclase → Apatite → Corundum
D.Calcite → Fluorite → Apatite → Quartz → Orthoclase → Diamond
Explanation: The complete Mohs hardness scale in ascending order (1 to 10) is: 1 Talc, 2 Gypsum, 3 Calcite, 4 Fluorite, 5 Apatite, 6 Orthoclase feldspar, 7 Quartz, 8 Topaz, 9 Corundum, and 10 Diamond. The sequence Gypsum (2) → Calcite (3) → Fluorite (4) → Apatite (5) → Orthoclase (6) → Quartz (7) is perfectly increasing.
5In silicate mineralogy, what fundamental structural arrangement defines the Inosilicates?
A.Isolated individual [SiO4]4- tetrahedra linked only by interstitial cations
B.Continuous single or double chains of shared [SiO4] tetrahedra
C.Continuous two-dimensional sheets of [SiO4] tetrahedra sharing three oxygen atoms
D.Three-dimensional framework of [SiO4] tetrahedra sharing all four oxygen atoms
Explanation: Inosilicates are chain silicates where silica tetrahedra link together into continuous single chains (Si:O ratio 1:3, e.g. Pyroxenes) or double chains (Si:O ratio 4:11, e.g. Amphiboles) through shared oxygen vertices.
6How can pyroxenes and amphiboles be distinguished reliably in hand specimens and thin sections based on their cleavage angles?
A.Pyroxenes exhibit cleavage at 56° and 124°, whereas amphiboles exhibit cleavage at 87° and 93°
B.Pyroxenes exhibit cleavage at nearly right angles (87° and 93°), whereas amphiboles exhibit cleavage at 56° and 124°
C.Pyroxenes have three sets of cubic cleavage, whereas amphiboles show one perfect basal cleavage
D.Pyroxenes exhibit rhombohedral cleavage at 75°, whereas amphiboles show conchoidal fracture without cleavage
Explanation: Due to their single-chain structure, pyroxenes develop two prismatic cleavage planes intersecting at approximately 87° and 93° (nearly right angles). Amphiboles, having wider double-chain structures, develop cleavage planes intersecting at approximately 56° and 124°, producing characteristic diamond-shaped cross-sections.
7A petrographic thin section of standard thickness d = 30 μm (0.030 mm) shows a colorless mineral exhibiting a maximum optical retardation Δ = 270 nm (first-order yellow/white) under crossed polars. Using the birefringence formula δ = Δ / (1000 · d), what is the mineral's birefringence and most probable identity?
A.δ = 0.009; Quartz
B.δ = 0.036; Augite
C.δ = 0.172; Calcite
D.δ = 0.000; Garnet
Explanation: Applying the formula: δ = Δ / (1000 · d) = 270 nm / (1000 × 0.030 mm) = 270 / 30,000 = 0.009. A maximum birefringence of 0.009 producing first-order gray-to-straw-yellow interference colors at 30 μm thickness is diagnostic of Quartz.
8Under a polarizing petrographic microscope with crossed polars, a quartz crystal in a deformed quartzite displays wavy, non-uniform extinction that sweeps across the grain as the stage is rotated. What is this optical phenomenon called and what causes it?
A.Parallel extinction caused by compositional zoning
B.Undulose (undulatory) extinction caused by crystal lattice strain and dislocation accumulation
C.Inclined extinction caused by exsolution lamellae formation
D.Isotropic extinction caused by complete amorphization
Explanation: Undulose (undulatory) extinction is characteristic of quartz grains subjected to tectonic stress and ductile strain. Differential deformation causes lattice bending and subgrain dislocation accumulation, so different domains within the single grain reach extinction at slightly different stage rotation angles.
9Which of the following field and chemical tests reliably distinguishes Calcite from Dolomite in rock specimens?
A.Calcite scratches glass, whereas dolomite is scratched by a fingernail
B.Calcite effervesces vigorously in cold dilute 10% HCl, whereas dolomite effervesces only weakly or when powdered/warmed
C.Calcite exhibits one cleavage plane at 90°, whereas dolomite has three cleavage planes at 60°
D.Calcite is strongly magnetic, whereas dolomite is diamagnetic
Explanation: Calcite (CaCO3) reacts immediately and effervesces vigorously with cold dilute (10%) hydrochloric acid, releasing CO2 gas bubbles. Dolomite (CaMg(CO3)2) has much lower reactivity and will only effervesce vigorously if powdered or treated with warm/concentrated acid.
10A geologist uses a hydrostatic balance to determine the specific gravity (SG) of an unknown mineral specimen. The dry specimen weighs 52.0 g in air and 32.0 g when suspended in distilled water. Using SG = W_air / (W_air - W_water), what is the specific gravity of the mineral?
A.1.63
B.2.60
C.3.25
D.5.20
Explanation: Using Archimedes' principle: SG = W_air / (W_air - W_water) = 52.0 g / (52.0 g - 32.0 g) = 52.0 / 20.0 = 2.60. A specific gravity around 2.60–2.65 is typical of common rock-forming minerals like quartz (2.65) and feldspars (2.55–2.76).

About the Cameroon GCE A-Level Geology Exam

The Cameroon GCE Advanced Level Geology (Subject Code 0755) is the premier national high school leaving and university qualifying examination in Earth Sciences in Anglophone Cameroon. Administered annually by the Cameroon GCE Board in Buea, it rigorously evaluates candidates across five comprehensive syllabus domains: Mineralogy, Crystallography and Petrology; Structural Geology and Plate Tectonics; Palaeontology, Stratigraphy and Earth History; Economic Geology, Hydrogeology and Engineering Geology; and Geological Mapwork and Field Methods. The examination places unique emphasis on regional African and Cameroonian geology, including the Cameroon Volcanic Line, Mount Cameroon eruptive history, the Lake Nyos limnic gas disaster, the Congo Craton, and national petroleum/mineral basins. Format note: this site's practice bank is 100 four-option multiple-choice questions covering the whole official syllabus. Paper 1 of the real examination is genuinely multiple choice (50 compulsory questions), so the format matches that paper, but the bank is a study aid only — it does not simulate the written theory/essay paper(s) or any practical examination, and its length does not describe the official exam.

Assessment

Official Advanced Level structure for subject code 0755 (Geology) per the Cameroon GCE Board June 2026 timetable (Form G6): Paper 1: 50 compulsory multiple-choice questions (1 hour 30 minutes); Paper 2: written theory/structured questions (3 hours); a separately scheduled practical examination (practical phase, 5–27 May 2026). Total written time is 4 hours 30 minutes. The Board does not publish per-paper mark weightings for individual subjects.

Time Limit

Paper 1: 1 hour 30 minutes; total written time 4 hours 30 minutes plus a separately scheduled practical examination.

Passing Score

Grade E or better (Cameroon GCE Advanced Level grades A, B, C, D and E are passes; O is a subsidiary pass and F is a fail)

Exam Fee

17,000 FCFA (Cameroon General Certificate of Education Board (CGCEB), Buea)

Cameroon GCE A-Level Geology Exam Content Outline

20%

Mineralogy, Crystallography & Petrology

Comprehensive study of crystal systems, symmetry elements, Miller indices, physical and optical properties of rock-forming minerals (silicates, carbonates, oxides, halides, sulfides), Bowen's reaction series, magmatic differentiation, igneous structures and textures, weathering, sediment transport, sedimentary facies and diagenetic lithification, metamorphic agents, Barrowian metamorphic zones, index minerals, and metamorphic facies grids (greenschist, amphibolite, granulite, blueschist, eclogite, hornfels).

20%

Structural Geology & Plate Tectonics

Investigation of stress and strain, brittle and ductile deformation, fold geometries (anticline, syncline, overturned, recumbent, isoclinal) and interlimb angles, fault classifications (normal, reverse, thrust, strike-slip) and Anderson's fault criteria, joints and unconformities, continental drift evidence, seafloor spreading rates, plate boundary dynamics, the Wilson cycle, and Cameroon regional geology including the Cameroon Volcanic Line (CVL), Mount Cameroon volcanism, Lake Nyos limnic gas release, and Precambrian basement geology (Congo Craton / Pan-African Mobile Zone).

20%

Palaeontology, Stratigraphy & Earth History

Principles of stratigraphy (superposition, original horizontality, cross-cutting relationships, faunal succession), unconformities and stratigraphic correlation, fossil preservation modes (permineralization, carbonization, molds, casts, trace fossils/ichnology), invertebrate palaeontology (trilobites, brachiopods, cephalopods/ammonites, graptolites, corals, echinoderms), the Geological Time Scale, Precambrian atmosphere evolution (BIFs and Great Oxidation Event), the Cambrian Explosion, and major mass extinction events (End-Permian, End-Cretaceous K-Pg impact).

20%

Economic Geology, Hydrogeology & Engineering Geology

Ore genesis processes (magmatic segregation, hydrothermal porphyry and vein systems, sedimentary BIFs, placer and residual bauxite deposits in Cameroon), petroleum geology (source rocks, kerogen maturation, reservoir porosity/permeability, seals, and trap types in Cameroonian sedimentary basins), coalification series, hydrogeology (confined/unconfined aquifers, Darcy's law flow calculations, storativity, transmissivity, cone of depression), and engineering geohazards (slope stability factor of safety calculations, landslides in Cameroon's Western Highlands, volcanic and seismic hazard mitigation).

20%

Geological Mapwork & Field Methods

Interpretation of geological maps, contour analysis, rule of 'V's for outcrop patterns across topography, strike and dip definitions, true vs apparent dip calculations, geological cross-section construction, vertical exaggeration calculation, determination of stratigraphic thickness, fold and fault recognition on maps, borehole stratigraphic correlation, the three-point problem, and field geological equipment usage (compass-clinometer, strike azimuth right-hand rule).

How to Pass the Cameroon GCE A-Level Geology Exam

What You Need to Know

  • Passing score: Grade E or better (Cameroon GCE Advanced Level grades A, B, C, D and E are passes; O is a subsidiary pass and F is a fail)
  • Assessment: Official Advanced Level structure for subject code 0755 (Geology) per the Cameroon GCE Board June 2026 timetable (Form G6): Paper 1: 50 compulsory multiple-choice questions (1 hour 30 minutes); Paper 2: written theory/structured questions (3 hours); a separately scheduled practical examination (practical phase, 5–27 May 2026). Total written time is 4 hours 30 minutes. The Board does not publish per-paper mark weightings for individual subjects.
  • Time limit: Paper 1: 1 hour 30 minutes; total written time 4 hours 30 minutes plus a separately scheduled practical examination.
  • Exam fee: 17,000 FCFA

Keys to Passing

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Cameroon GCE A-Level Geology Study Tips from Top Performers

1Master Mineral and Rock Identification Criteria: Memorize Mohs hardness values, cleavage angles (e.g. pyroxene 87°/93° vs amphibole 56°/124°), and Bowen's reaction series order, as well as distinguishing textures (porphyritic, granoblastic, amygdaloidal).
2Understand Cameroon Regional Geology Thoroughly: Be prepared to describe the tectonic evolution of the Cameroon Volcanic Line (CVL), the alkaline basanitic lavas of Mount Cameroon, the limnic eruption mechanism of Lake Nyos (dissolved CO2 saturation in bottom waters), and the bauxite deposits of Ngaoundéré and Fongo-Tongo.
3Practice Quantitative Mapwork Formulas: Ensure speed and accuracy in calculating vertical exaggeration (VE = Horizontal Scale / Vertical Scale), apparent dip (tan apparent dip = tan true dip * cos beta), and true stratigraphic thickness (t = w * sin dip).
4Learn Fossil Morphologies and Stratigraphic Ranges: Focus on the diagnostic features and evolutionary trends of trilobites (facial sutures), brachiopods vs bivalves (symmetry planes), cephalopod suture complexity (goniatitic to ammonitic), and graptolites (reduction in stipe numbers).
5Review Hydrogeology and Darcy's Law: Practice calculating discharge (Q = K * A * dh/dl) and distinguishing between unconfined aquifers (water table) and confined artesian aquifers (potentiometric surface).
6Understand Fault Kinematics and Stress Ellipsoids: Memorize Anderson's theory of faulting (normal faulting: sigma 1 vertical; thrust faulting: sigma 3 vertical; strike-slip faulting: sigma 2 vertical).

Frequently Asked Questions

What is the structure of the Cameroon GCE Advanced Level Geology (0755) examination?

The Cameroon GCE A-Level Geology examination consists of three separate papers: Paper 1 is a 1-hour 30-minute multiple-choice paper comprising 50 compulsory questions; Paper 2 is a 2-hour 30-minute theory paper containing structured and essay-style questions covering advanced geological principles; and Paper 3 is a 2-hour 30-minute practical laboratory and mapwork examination testing hand specimen identification (minerals, rocks, fossils) and geological map interpretation.

What are the passing grades and scoring criteria for GCE A-Level Geology in Cameroon?

Results are awarded on a letter-grade scale from Grade A to Grade F. Grades A (5 points), B (4 points), C (3 points), D (2 points), and E (1 point) represent official passing grades at the Advanced Level. Grade O represents an Ordinary Level subsidiary pass (0 points), and Grade F is a failing grade. Achieving Grade E or above qualifies the student for university Earth Science and engineering admissions.

Why is regional Cameroon geology so heavily emphasized on the exam?

Cameroon possesses exceptional geological diversity, including the Cameroon Volcanic Line (CVL) with active stratovolcanoes like Mount Cameroon, rare limnic-active crater lakes (Lake Nyos and Lake Monoun), Archean cratonic basement rocks of the Congo Craton, and petroliferous coastal basins (Rio del Rey and Douala/Kribi-Campo). The CGCEB syllabus specifically mandates that students understand local geodynamic and economic geological features alongside global principles.

What mathematical and quantitative skills are required for the Geology examination?

Candidates must be able to perform calculations involving: Darcy's Law for groundwater flow rate and hydraulic gradients; radioactive half-life decay equations for radiometric dating; vertical exaggeration on geological cross-sections; true vs apparent dip trigonometric conversions; true stratigraphic thickness calculations; mineral specific gravity; fold interlimb angles; and slope stability Factor of Safety (FS) determinations.