NCERT Geo 6 Ch 3 | Motions of the Earth | Rotation, Revolution & Seasonal Cycles |

Welcome to Simplified UPSC by पठति पठत: पठन्ति! In this comprehensive discussion, we'll dive deep into the fundamental geographical concepts covered in Chapter 3 of NCERT Class 6 Geography, "The Earth: Our Habitat." This episode specifically explores the crucial mechanisms that govern day-night cycles and seasonal variations—the Motions of the Earth.

Our hosts dissect the core topics necessary for a strong UPSC/SSC foundation:

🌍 *Rotation (Ghurnan):* Learn how the daily motion of the Earth determines day and night, the concept of the Earth Day, and the significance of the Circle of Illumination.

🔄 *Revolution (Parikraman):* Understand Earth's annual journey around the Sun and how this motion, combined with the 66.5° axial tilt, drives the change of seasons. We clarify the formation of the Leap Year.

☀️ *Solstices & Equinoxes:* Master the four critical dates (June 21st, December 22nd, March 21st, September 23rd) and their impact on day length across the Northern and Southern Hemispheres.

We also solve a previous year's UPSC Prelims question directly linked to seasonal changes and axial tilt. Finally, we briefly touch upon advanced concepts like Milankovitch Cycles, illustrating the long-term changes in Earth's climate.

This "SimplifiedConvo" format ensures clarity on both the factual 'what' and the conceptual 'why.'

---

✅ Join our Community for notes & practice questions: https://t.me/simplifiedupscbyppp

👍 Like, Share, and Subscribe to Simplified UPSC by PPP and hit the bell icon to never miss a chapter!

📝 SUMMARY 📝
This video, derived from NCERT Class 6 Geography (Chapter 6, focusing on Motions of the Earth), details the two primary movements of the planet: Rotation (causing day and night, defined by the 24-hour Earth Day) and Revolution (causing seasonal changes over 365.25 days, leading to the Leap Year). The discussion emphasizes the 66.5-degree axial tilt as the key factor influencing seasonal variation. Key astronomical events—Summer Solstice (June 21), Winter Solstice (December 22), and the two Equinoxes (March 21, September 23)—are explained with their precise impact on day/night length and hemisphere seasons. It connects these fundamental concepts directly to UPSC Preliminary questions and briefly introduces Milankovitch cycles as a deeper climatic linkage.

⏰ TIMESTAMPS ⏰
00:00:00 - Introduction and UPSC Relevance (PYQ 2013)
00:01:13 - Earth's First Motion: Rotation (Ghurnan)
00:02:04 - Earth Day and the Circle of Illumination (Pradipti Vratt)
00:02:47 - The Significance of Earth's Axial Tilt (66.5°)
00:04:10 - Earth's Second Motion: Revolution (Parikraman)
00:05:48 - The Annual Cycle and the Concept of Leap Year
00:06:38 - How Revolution and Tilt Cause Seasonal Change
00:07:45 - Key Astronomical Dates: Solstices and Equinoxes
00:08:10 - Summer Solstice (Greeshm Ayanant) - June 21st
00:08:56 - Winter Solstice (Sheet Ayanant) - December 22nd
00:09:50 - Equinoxes (Vishuv) - Equal Day and Night
00:11:09 - UPSC Mains Linkage: Climatic Relevance and Milankovitch Cycles

#NCERTGeography #Class6Geography #TheEarthOurHabitat #GeographyForUPSC #UPSCFoundation #SSCGeography #CBSEClass6 #GeographyNCERT #SimplifiedUPSC #NCERTSummary #UPSCPlaylist #EarthRotation #EarthRevolution #Solstices #Equinoxes #AxialTilt #SeasonalChange #LeapYear #CircleOfIllumination #June21 #December22 #March21 #September23 #GS1Geography #PhysicalGeography #UPSC2024 #UPSC2025 #NCERT_Simplified #CompetitiveExams #PrelimsPreparation #MainsPreparation #DailyMotion #AnnualMotion #TropicOfCancer #TropicOfCapricorn #Equator #SummerSeason #WinterSeason #SpringEquinox #AutumnEquinox #Milankovitch #ClimateScience #EarthScience #SolarEnergy #Insolation #DrishtiIAS #Unacademy #StudyIQ #GSGeography #HindiEnglish