[Geography Lecture1] Longitude, Latitude, Timezones, Earth Interior, Rock types, Continental Drift

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Mrunal New Economy Course for UPSC
  1. Prologue
  2. G1/P1:  longitudes, latitudes, Timezones and Dateline
  3. G1/P2: Earth’s Interior, S & P waves, Rock-Cycle, Geological Time-eras
  4. G1/P3: Continental Drift Theory
  5. G1/P4: Sea Floor Spreading Theory


  • These geography lectures are conducted by Ms. Rajtanil at Sardar Patel institute of Public Administration (SPIPA), Ahmedabad.
  • First session began on 2st February 2015, and uploaded on youtube. Total ~2:30 hours but I’ve split it into four parts.
  • PowerPoint of the lecture, available at Mrunal.org/Download
  • Medium of instruction- Hindi.
  • English version not possible for the moment, because faculties are required to teach at this batch, in Hindi/Gujarati only. Besides, same content is available in English in the powerpoints.

Geography Lecture UPSC

G1/P1:  longitudes, latitudes, Timezones and Dateline

Language: Hindi, Topics Covered:

  1. Longitudes and Latitudes: definitions and concepts.
  2. Why is there heat deficit and heat surplus regions on earth?
  3. Reason for season on earth, Day and night time variation, from season to season
  4. What are Solstice and equinox? UPSC-CSAT-2013 question on day-night time variation
  5. Daylight saving in temperate regions
  6. Longitude – prime meridian, International dateline (IDL)
  7. How moving to west to IDL one day is lost and how moving to east of IDL one day is gained? Example of Russia and Alaska
  8. Standard time: Indian standard time, Chaibaagan time zone issue
  9. Exercises – calculation regarding standard time of a place
  10. Solved UPSC CSAT Prelim Question 1999, 2006, 2008
  11. Map explanations for Malacca strait, Strait of Florida, Strait of Gibraltar

Youtube Link: http://youtu.be/SMPO60DOTKQ

G1/P2: Earth’s Interior, S & P waves, Rock-Cycle, Geological Time-eras

  1. Origin of the earth, Nebular theory of Laplace
  2. Speculation about earth’s interior: Heaviest elements are placed at the core and lighter elements are at the surface.
  3. Interior of the earth: Density study, Temperature study, Direct and indirect evidences
  4. SIAL and SIMA concepts- Edward Suess
  5. Seismic wave studies: Propagation of S-Waves and P-Waves
  6. Layers of earth’s interior: Lithosphere, asthenosphere, mantle, outer core, inner core.
  7. Composition of interior of the earth and the crust.
  8. Rocks of the continental crust
  9. Rock-cycle (Igneous rock, sedimentary, metamorphous)
  10. Properties of Igneous rocks
  11. Properties of sedimentary rocks
  12. Properties of metamorphous rocks
  13. Prev. years question on rocks
  14. Geological history of the earth: Super continent –Rodinia, Breaking up of Rodinia
  15. Formation and breaking of Pangaea
  16. What are Panthalasa
  17. Laurasia, Gondwana and Tethys sea
  18. Breaking up of Gondwana
  19. Movement of Indian plate

Youtube Link: http://youtu.be/DzAH67tsmh8

G1/P3: Continental Drift Theory

  1. Alfred Wegener and his theory.
  2. Evidences and Limitations of Continental drift theory
  3. UPSC 2013 Mains question on this topic
  4. Drawing maps for India and world in minutes.
  5. Arthur Holmes: convection current theory
  6. Driving force behind the continental drift

Youtube Link: http://youtu.be/IxpPoVc7y3U

G1/P4: Sea Floor Spreading Theory

  1. Beginning of Sea-floor spreading theory
  2. Mapping of Sea-floor in 1950s
  3. 3 questions raised after sea-floor mapping
  4. Henry Hass and Dietz – theory
  5. Mid- oceanic ridge – Mechanism and distribution in the world oceans,
  6. Trenches – distribution in the world oceans,  Mechanism of trenches, the Mariana trench – deepest trench of the world
  7. UPSC Prelim 2006 q. on trench
  8. Concept of Palaeo-magnetism, geomagnetism, Vine and Mattheus

Youtube Link: http://youtu.be/BlBg5GVhZ5k

Indian History Freedom Struggle Pratik Nayak

155 Comments on “[Geography Lecture1] Longitude, Latitude, Timezones, Earth Interior, Rock types, Continental Drift”

  1. please upload the file into mrunal online storage…all contents are empty..indian geography…

    1. right bro i am also not able to download

  2. Sir are these videos are alone sufficient for preparation

  3. hello guys this is arun here new one in prep of upsc i need proper guideline from u are .
    and need a partner to study combine

  4. are these lectures sufficient for main…optional..
    or else what need to be covered before..
    any one from chandigarh…???
    guys it would be a great help if you suggest me..

  5. anyone here from virar or mumbai here, preparing for 2018 pre. i need some people for group discussions or studies.
    contact me at jaysinghrathod101@gmail.com. Thank You.

      1. 7709483110 please suggest study room near ghatkopar

    1. Hi I m from Kurla
      Preparing for Upsc 2022

      Are u preparing or cleared ? Ias

  6. hey anybody interesting in making group for pre’18

    1. Do you still need a group?

  7. How to prepare ias pre &mains in Hindi medium

  8. Tell me sir best kannada language website please…

  9. Will any1 help me in getting ENGLISH notes of mrunal sirs videos??? plzZz

  10. Did you got the link for mrunal sirs videos in English? ?

  11. How to download PPTs of lectures

  12. ….

  13. no able to download ppt . plz. provide otherwise youtube geograhy lectures are hard to

  14. I am unable to download PDFs or PPTs of the lectures, can anybody help?

  15. Is anyone able to download the PPTs? Please help.

  16. sir links are invalid

  17. sir , i am unable to download the PPTs / PDFs can you fix this issue for us that will be a great help

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