Eduqas A-Level Geology (A220QS): complete guide to the concepts, themes, components and fieldwork

Eduqas A-Level Geology (specification A220QS) is the WJEC Eduqas linear A-level for England: a two-year course assessed by three written components at the end of Year 13. There is no coursework grade, and, unlike the A-level sciences, no separately graded practical endorsement; practical and fieldwork skills are examined within the written papers, with a minimum of four days of fieldwork required. This page is the index: below is a concept-by-concept map of the content, the component structure, the quantitative skills, and how to study each area.

How the content is organised

Eduqas builds the subject on eight core geological concepts that run through the whole course, then applies them through five themes. We organise the content into six modules on this site so that every specification key idea has a focused page. The build order runs from Earth materials, through tectonics and rock-forming processes, to deformation, geological time, and finally the applied geohazards and economic geology that dominate Component 3.

Elements, minerals and rocks

The foundations: atomic structure and bonding, the silicate minerals and the major mineral groups (carbonates, oxides, sulphides, halides, native elements), how to identify minerals by their physical properties, the field and laboratory tests for minerals and rocks, and the threefold classification of rocks within the rock cycle. Start here; everything later assumes the named minerals and rocks.

Earth structure and global tectonics

Earth's internal structure from seismic evidence, the development and evidence of plate tectonics (continental drift, sea-floor spreading and palaeomagnetism), the processes and features of constructive, destructive and conservative margins, earthquakes and seismic waves, volcanic activity and eruption styles, and the structure of the lithosphere with mantle plumes and hotspots (the basis of the Component 3 lithosphere option).

Rock-forming processes

The detailed petrology: igneous rock classification and textures, magma differentiation and Bowen's reaction series, weathering, erosion and sediment transport, sedimentary rocks and their depositional environments and structures, metamorphism with grade and facies, and the forms of igneous intrusions and volcanic edifices.

Rock deformation and geological structures

How rocks respond to stress: stress, strain and brittle versus ductile behaviour, folds, faults and joints, unconformities and the gaps they record, dip, strike and true thickness, and the interpretation of geological maps and cross-sections (the heart of Components 1 and 3).

Time, past life and past climates

Geological time and the reconstruction of Earth history: relative dating and stratigraphic principles, radiometric dating and half-life, fossils, preservation and index fossils, evolution and the fossil record, palaeoenvironments and palaeoclimate proxies, and the Quaternary glacial and periglacial geology that forms a Component 3 option.

Geohazards and economic geology

The applied theme that drives Component 3: earthquake hazards, risk and mitigation, volcanic hazards and monitoring, mass movement and landslide hazards, ore deposits and economic minerals, hydrocarbons and petroleum systems, and groundwater, aquifers and hydrogeology.

Component structure

Eduqas A-Level Geology is assessed by three written components, all sat at the end of the course. A calculator and a formula sheet are provided.

• Component 1 Geological Investigations is the practical and interpretative paper. It assesses the investigation of the geology of an area using hand specimens, photographs and a simplified geological map, together with data interpretation and fieldwork skills. Around one-third of the A-level.
• Component 2 Geological Principles and Processes is the more theoretical paper. It assesses core geological knowledge and understanding across the whole specification (Earth structure, tectonics, rock-forming processes, deformation, fossils and geological time). Around one-third of the A-level.
• Component 3 Geological Applications covers geohazards, the interpretation of real geological map extracts, and one option theme chosen from Quaternary geology, the geological evolution of Britain, or the geology of the lithosphere. It draws on understanding from across the whole specification. Around one-third of the A-level.

The three assessment objectives are weighted at roughly AO1 35 percent (knowledge and understanding), AO2 35 percent (application) and AO3 30 percent (analysis, interpretation and evaluation). Mathematics equivalent to about 20 percent of the assessment is embedded throughout. To be awarded the A-level you must complete the minimum four days of fieldwork; the centre confirms this with a fieldwork statement.

How to study Eduqas Geology

Geology rewards precise factual mastery plus the ability to apply it to unfamiliar maps, logs, graphs and specimens.

1. Work from the specification's key ideas. Each statement is a checklist; questions are written from them. Turn each into a flashcard.
2. Learn the named minerals and rocks exactly. Identification by physical properties (hardness, cleavage, lustre, density) and by texture underpins Components 1 and 3, so memorise the diagnostic features of quartz, the feldspars, the micas, calcite, and the common igneous, sedimentary and metamorphic rocks.
3. Learn definitions precisely. Mark schemes award marks for exact wording (for example "facies", "angular unconformity", "half-life", "porosity", "cut-off grade").
4. Master the maps and specimens. Dip and strike, true thickness, identifying minerals and rocks in hand specimen, and reading a cross-section appear repeatedly, especially in Components 1 and 3.
5. Drill the quantitative skills. Practise true-thickness, epicentre-distance, radiometric-dating, porosity and Darcy's-law calculations until they are automatic.
6. Practise interpretation and extended response. The application and analysis objectives reward inferring a sequence of events from a cross-section, reconstructing an environment from data, and evaluating evidence. Drill these weekly from the start of Year 13.

Module dot points

For specification-level coverage, each topic has its own focused answer page with worked exam questions and cross-links. Browse the full set at /a-level-eduqas/geology/syllabus. The six modules are:

• Elements, minerals and rocks - atomic structure and bonding, silicate and other minerals, identifying minerals by physical properties, mineral and rock tests, and the rock cycle.
• Earth structure and global tectonics - Earth's interior from seismic evidence, plate tectonic theory and evidence, plate margins, earthquakes, volcanic activity, and the lithosphere, plumes and hotspots.
• Rock-forming processes - igneous classification and textures, magma differentiation and Bowen's reaction series, weathering and transport, sedimentary environments, metamorphism, and igneous intrusions and volcanic forms.
• Rock deformation and geological structures - stress and strain, folds, faults and joints, unconformities, dip, strike and true thickness, and geological maps and cross-sections.
• Time, past life and past climates - relative and radiometric dating, fossils and index fossils, evolution, palaeoclimate proxies, and Quaternary glacial geology.
• Geohazards and economic geology - earthquake, volcanic and landslide hazards, ore deposits, hydrocarbons, and groundwater and hydrogeology.

For the official specification

Eduqas publishes the full specification (A220QS), past papers and mark schemes at eduqas.co.uk. Always revise from the current specification and Eduqas's own past papers, because the question style and the levels-of-response mark schemes are board-specific.