Скачать или смотреть NCERT CLASS 11TH GEOGRAPHY CH 3 | UPSC | PCS | MUST WATCH | SIMPLIFIED AND EASY | UPSC 2026 |

📘 NCERT Class 11 Geography – Chapter 3: Interior of the Earth | UPSC 2026 / PCS / Foundation Series

Welcome back future officers! 🚀
In this lecture, we’ll dive deep inside our planet 🌍 —
understanding the structure, composition, and layers of the Earth’s interior,
based on NCERT Class 11 Geography (Fundamentals of Physical Geography).

This chapter is one of the most important for UPSC Prelims, Mains GS Paper-1, and Geography Optional,
as it forms the conceptual base for topics like earthquakes, volcanoes, plate tectonics, and continental drift.

🧭 What You’ll Learn in This Lecture

NCERT Chapter 3 line-by-line simplified explanation

How we know about Earth’s interior – Direct & Indirect Sources

Earthquake Waves (P & S Waves) and what they reveal

Layers of the Earth – Crust, Mantle, Core (composition & properties)

Lithosphere, Asthenosphere, Mesosphere concepts

Shadow zones & structure of Earth’s core

Important diagrams & UPSC tricks to remember values

📘 Topics Covered

✅ Direct sources – mines, volcanic eruptions
✅ Indirect sources – meteorites, gravity, magnetic field, seismic waves
✅ Earthquake waves (P-waves, S-waves, L-waves) – properties & behavior
✅ Structure & composition of Earth’s interior
✅ Mohorovičić Discontinuity, Gutenberg, and Lehmann Discontinuities
✅ Density and temperature variations inside Earth

💡 Why Watch This Lecture?

🔹 Builds strong conceptual clarity for UPSC GS Paper-1
🔹 Explains the link between earthquakes, volcanoes & plate tectonics
🔹 Includes all important NCERT diagrams & keywords
🔹 Easy Hinglish explanation — perfect for beginners
🔹 Helps in both Prelims MCQs & Mains descriptive answers

📚 Best For:

UPSC CSE | State PCS | Geography Optional | CUET | Foundation Students | Earth Science Enthusiasts

🧠 Bonus (Covered in Lecture):

Remembering Earth’s layers trick

Real-life examples of earthquakes

How shadow zones prove liquid outer core

Mains answer writing angle for “Structure of the Earth”

🔔 Don’t Forget

👉 Like, Share, & Subscribe for the full NCERT-to-UPSC Geography series
👉 Comment your doubts — I’ll answer them in the next session
👉 Join Telegram / Instagram for notes, MCQs & map practice!

🏷️ Tags / Keywords (for YouTube SEO)

#UPSC2026 #NCERTGeography #InteriorOfTheEarth #Class11Geography #UPSCFoundation #GeographyLecture #EarthquakeWaves #UPSCPreparation #PCSExam #NCERTtoUPSC #IASGeography #UPSCStrategy #EarthLayers #MohorovicicDiscontinuity