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

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Mrunal's Economy Course
  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

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

  1. thank sir/mam for this kind & great effort. I want to say please provide us more video lecture of History, Art & culture.
    I am a fresher & i am not doing coaching. so please sir/mam help us. me & my friends are highly obliged to you.

    Ankit singh

  2. not able to open the power point….in word and adobe reader
    pls suggest

  3. madam the answer you have taught as correct for 2013 gs paper is wrong. day night time variation is due to tilting of axis. its not my view and upsc has given this answer in its official key. so please check it and please don’t give your own theory instead check some references before telling some concept. if u tell people wrong concepts then u r wasting their 1 year and 1 chance…
    nyway thank u for ur lecture …

  4. Geography lecture 1(G1/P1) video—

    Variations in the length of daytime and night time from season to season are due to

    a.the earth’s rotation on its axis
    b.the earth’s revolution round the sun in an elliptical manner
    c.latitudinal position of the place
    d.revolution of the earth on a tilted axis
    answer given for this question in UPSC answer key is also d.(revolution of the earth on a tilted axis) and madam in this video explaining b is correct.
    Mrunal sir also gave answer d as correct.

  5. Answer d is correct

  6. Thanks sir & madam to do this philosophical work.

  7. Thanks sir & madam to do this philanthropical work,especially lecture in hindi

  8. how to draw maps of india and world?
    although written in prologue but nowhere mentioned in lecture

  9. can you provide notes in topic wise like economy subject, so that we can study all thing in one place . there is only available only slide of powerpoint and video ,

  10. Are these lectures for GS Mains or Geography optional?

  11. Sir. I prepare for cgl.. ur video lecture would have help in cgl preparation?

  12. is this enough for gs1 and gs3 part of geo…………….please i need advise..badly…….can anyone reply my email id rashsahay4@gmail.com……………..i posted earlier as well ………

  13. Hats off to Rajtanil Mam. You are such a wonderful teacher, awesome lectures. With lots of respect and prayers from the bottom of my heart I wish you all the best for your Interview Mam. And I believe and know that you are going to clear it with ease mam, the whole process, and will make in to the final list. Ab aapko nahi milega tho fir kisko milega Mam..

  14. is anyone able to download the content from download section? pls respond

  15. The powerpoint presentation for this lecture is not available on download section (at least I couldn’t find it).Please help.

  16. in composition of the interior of the earth need updation in part of crust property you are mentioned potassium is lowest in earth’s crust , in ncert page no. 42 (xi geography ) magnesium (2.09) is lowest in earth’s crust.

    please update it.

    thank you

  17. Hi Sir/Madam,

    All the slides which are in lecture are not available in slides(downloaded ppt).Some key slides and connecting slides are missing.Can you pls look into it.


  18. I can’t find it’s ppt link. Plz help me

  19. helping me with latest updated information regarding ias

  20. Thanks a ton! Much helpful!

  21. Plz update on new things that will help me for UPSC preparation

  22. Thanks a lot and it’s very useful.Keep it up.
    Thanks again

  23. can any body tell me that how to download power point lecture pdf

  24. thanks for all this very expensive for poor economical student thanxxxxxxxx

  25. how i can download all those slide explained in the lecture?
    please let me know. thanku

  26. Got those ppt in download section

  27. I am a new player in field of preparation…just started my upsc oriented preparation 3_4 months ago…if anyone is interested in combined preparation pls leave me a mail on SHUBHAMYADAV@YMAIL.COM

  28. Hii I am new here plzz share urr note with me

  29. i am fresher please suggest me how to prepare for upsc preliminary examination please.

  30. which books to refer for art and culture?

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