Assam Higher Secondary Geology study plan

Define the scope of geology as a science and distinguish it from allied fields such as geophysics, geochemistry and palaeontology, writing your own one-line definition of each.

List the three main rock types (igneous, sedimentary, metamorphic) and state two diagnostic features of each, then classify ten unnamed rock descriptions you write yourself into the correct type.

Explain the internal structure of the Earth (crust, mantle, core) with approximate depths and compositions, and sketch a labelled cross-section from memory.

Describe the rock cycle as a system of processes (melting, crystallisation, weathering, erosion, deposition, lithification, metamorphism) and trace two complete pathways through it.

Identify the common rock-forming minerals (quartz, feldspar, mica, olivine, calcite, gypsum, pyroxene, amphibole) by their physical properties and tabulate hardness, lustre, cleavage and colour for each.

Apply Mohs hardness scale to rank ten household and field materials and explain how hardness testing is used in identification.

Explain the concepts of crystal form, cleavage and fracture, and distinguish cleavage planes from crystal faces in your own words.

Describe the silicate tetrahedron and classify silicate minerals into framework, chain, sheet and isolated structures with one example each.

Classify igneous rocks by texture (phaneritic, aphanitic, porphyritic, glassy, vesicular) and by composition (felsic to ultramafic), and place granite, basalt, gabbro, rhyolite, andesite and obsidian correctly on a simple classification grid.

Explain the difference between intrusive and extrusive igneous activity and relate cooling rate to crystal size with a worked example.

Describe Bowen's reaction series and use it to explain why certain minerals co-occur in the same rock.

Summarise the types of volcanoes, their eruption styles and the landforms they create, with one Indian or well-known world example for each type you can verify.

Describe the processes of weathering, erosion, transport and deposition, and distinguish mechanical from chemical weathering with three examples of each.

Classify sedimentary rocks into clastic, chemical and organic types and give three examples of each with their diagnostic features.

Explain sedimentary structures (bedding, cross-bedding, ripple marks, graded bedding, mud cracks) and state what each tells you about depositional environment.

Outline the stages of lithification and explain how grain size and sorting relate to transport energy.

Interpret a simple stratigraphic sequence you write yourself, naming the likely environment for each layer from its rock type and structures.

Distinguish foliated from non-foliated metamorphic rocks and place slate, schist, gneiss, phyllite, marble, quartzite and hornfels correctly.

Explain contact versus regional metamorphism and match each to its typical setting and rock assemblage.

Describe metamorphic grade and use index minerals to order a prograde sequence from shale to gneiss.

Relate metamorphism and igneous activity to plate tectonic boundaries with at least two worked examples.

Summarise the evidence for plate tectonics (palaeomagnetism, sea-floor spreading, fossil and rock matching, earthquake and volcano distribution) in a structured list.

Explain the causes of earthquakes (elastic rebound, faulting) and define focus, epicentre, seismic waves (P, S, surface), and how each wave behaves.

Describe how seismographs record earthquakes and how the S-P interval is used to locate an epicentre, working through one numerical example.

Explain the Richter and moment magnitude scales and intensity scales, and state why magnitude alone does not describe damage.

Outline volcano and earthquake distribution along plate boundaries and identify the major seismic belts.

Describe the geology of Assam and the Northeast India region in terms of tectonic setting, major faults, the Shillong Plateau and the Assam valley, and explain why the region is seismically active.

Describe the geological time scale (eons, eras, periods, epochs) with approximate boundary ages and the major biological and geological events of each era.

Explain the principles of stratigraphy (superposition, original horizontality, lateral continuity, cross-cutting relationships, faunal succession) and apply them to order a set of events in a diagram you draw.

Distinguish relative from absolute dating and explain radiometric dating principles including half-life, with one worked calculation.

Identify common fossils (ammonite, trilobite, brachiopod, gastropod, coral, plant impressions) and explain their use as index fossils.

Outline the major mass extinctions and their possible causes, keeping claims to those you can verify.

Consolidate the whole syllabus by writing a one-page summary sheet for each major unit (minerals, igneous, sedimentary, metamorphic, structure and tectonics, historical geology).

Attempt a full-length practice paper under timed conditions and mark it against your notes.

Identify your three weakest areas from the practice paper and re-study each with targeted notes.

Explain key economic and applied geology terms relevant to Assam such as coal, petroleum, limestone and groundwater occurrence, keeping to facts you can verify.

Review and correct every earlier deliverable so your notes form a single consistent, exam-ready set.