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Study rocks, water, weather and evidence about a changing environment.
8 GUIDES · ENGLISH & HINDI
Start with a level that fits what you already know. Each guide includes explanations, practice and answers. About learning levels →
Earth, weather & environment
BeginnerSoil is a developing system of minerals, organic matter, organisms, air and water.
Learning outcome: Read a soil profile, separate texture from structure, calculate equivalent soil loss and design a fair comparison of protective cover.
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IntermediateMountains, ocean ridges and earthquake belts are connected.
Learning outcome: Distinguish compositional and mechanical layers, interpret seismic evidence, compare plate boundaries and calculate a motion rate without pretending it predicts an earthquake.
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IntermediateA stone records processes, but its appearance alone does not reveal a complete history.
Learning outcome: Classify formation processes, reconstruct a sequence, calculate an idealised half-life age and recognise what a geological date actually measures.
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IntermediateWind is moving matter responding to forces.
Learning outcome: Explain pressure changes with height, compare pressure gradients and use a sea-breeze model without assuming every wind flows straight across a map.
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IntermediateThe monsoon is a seasonal circulation system, not a single rain cloud moving across India.
Learning outcome: Explain the circulation beyond a giant sea breeze, distinguish onset from one shower and interpret timing and area-weighted rainfall using explicit denominators.
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IntermediateRain can run off, remain in soil, return to the air or recharge an aquifer.
Learning outcome: Distinguish infiltration, recharge and groundwater flow; calculate a catchment budget and estimate storage change under clearly stated aquifer assumptions.
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IntermediateOne cool afternoon does not settle a climate question, and a smooth graph does not remove uncertainty.
Learning outcome: Calculate temperature anomalies and changes between period means, identify measurement artefacts and distinguish an observed trend from a forecast or causal explanation.
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IntermediateA coast is a meeting place of moving water, sediment and land.
Learning outcome: Explain these mechanisms, calculate tidal range using a common reference, and balance a coastal sediment account while recognising the limits of a short record.
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