L26 Isostasy & Earth’s Balance || Airy, Pratt & Hayford–Bowie Models for UPSC IAS Geography Lectures

In this video, we explain the Theory of Isostasy in the most simple and exam-oriented way. Isostasy is one of the most important concepts in UPSC Geography, UGC NET/JRF, and State PSC exams. 🔹 What you will learn: Meaning of Isostasy = “in equilibrium” and how Earth’s crust maintains balance. Why mountains have deep roots, while plains and oceans have shallow bases. How the lithosphere floats on the asthenosphere with the classic iceberg analogy. The discovery of Isostasy: Pierre Bouguer, Great Trigonometrical Survey of India & Clarence Dutton. Models of Airy, Pratt, and Hayford–Bowie simplified for UPSC Prelims, Mains (GS1 Geography), Essay, and Optional. ✨ Why this video is important: This topic is repeatedly asked in UPSC IAS, UGC NET, SSC, and State PCS Geography exams. A clear understanding of isostatic balance improves your conceptual clarity and helps you write high-scoring answers in UPSC Mains. 📢 Watch till the end for a clear, easy, and exam-oriented explanation that will strengthen your geography preparation and boost your confidence for competitive exams. If you found this helpful, don’t forget to LIKE 👍, SHARE 🔄, and SUBSCRIBE 🔔 for more UPSC IAS Geography lectures and current affairs updates. #UPSC #UPSCGeography #GeographyForUPSC #UPSC2025 #IAS #CivilServices #GeographyOptional #Geography #PhysicalGeography #EarthScience #UPSCExam #UPSCMains #UPSCPrelims #UGCNET #ExamPreparation #gsdhillon #brainrootsias #CurrentAffairs #Education