- Prologue
- G1/P1: longitudes, latitudes, Timezones and Dateline
- G1/P2: Earth’s Interior, S & P waves, Rock-Cycle, Geological Time-eras
- G1/P3: Continental Drift Theory
- G1/P4: Sea Floor Spreading Theory
Prologue
- 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.
G1/P1: longitudes, latitudes, Timezones and Dateline
Language: Hindi, Topics Covered:
- Longitudes and Latitudes: definitions and concepts.
- Why is there heat deficit and heat surplus regions on earth?
- Reason for season on earth, Day and night time variation, from season to season
- What are Solstice and equinox? UPSC-CSAT-2013 question on day-night time variation
- Daylight saving in temperate regions
- Longitude – prime meridian, International dateline (IDL)
- 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
- Standard time: Indian standard time, Chaibaagan time zone issue
- Exercises – calculation regarding standard time of a place
- Solved UPSC CSAT Prelim Question 1999, 2006, 2008
- 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
- Origin of the earth, Nebular theory of Laplace
- Speculation about earth’s interior: Heaviest elements are placed at the core and lighter elements are at the surface.
- Interior of the earth: Density study, Temperature study, Direct and indirect evidences
- SIAL and SIMA concepts- Edward Suess
- Seismic wave studies: Propagation of S-Waves and P-Waves
- Layers of earth’s interior: Lithosphere, asthenosphere, mantle, outer core, inner core.
- Composition of interior of the earth and the crust.
- Rocks of the continental crust
- Rock-cycle (Igneous rock, sedimentary, metamorphous)
- Properties of Igneous rocks
- Properties of sedimentary rocks
- Properties of metamorphous rocks
- Prev. years question on rocks
- Geological history of the earth: Super continent –Rodinia, Breaking up of Rodinia
- Formation and breaking of Pangaea
- What are Panthalasa
- Laurasia, Gondwana and Tethys sea
- Breaking up of Gondwana
- Movement of Indian plate
Youtube Link: http://youtu.be/DzAH67tsmh8
G1/P3: Continental Drift Theory
- Alfred Wegener and his theory.
- Evidences and Limitations of Continental drift theory
- UPSC 2013 Mains question on this topic
- Drawing maps for India and world in minutes.
- Arthur Holmes: convection current theory
- Driving force behind the continental drift
Youtube Link: http://youtu.be/IxpPoVc7y3U
G1/P4: Sea Floor Spreading Theory
- Beginning of Sea-floor spreading theory
- Mapping of Sea-floor in 1950s
- 3 questions raised after sea-floor mapping
- Henry Hass and Dietz – theory
- Mid- oceanic ridge – Mechanism and distribution in the world oceans,
- Trenches – distribution in the world oceans, Mechanism of trenches, the Mariana trench – deepest trench of the world
- UPSC Prelim 2006 q. on trench
- Concept of Palaeo-magnetism, geomagnetism, Vine and Mattheus
Youtube Link: http://youtu.be/BlBg5GVhZ5k
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thanks a lot sir
can u pls share how r they preparing for comprehension in SPIPA?
Thanks sir….
are you from odisha?
Thanks a lot sir…
Keep it up .. :)
thanks sir waiting 4 ur economy lecture.
Thanx a ton sir …..
please keep on uploading the videos not only in economy…..but from all the static subjects please it is helping a lot….
geography is well appreciated …..please put history n culture too…with ECONOMY AND GEOGRAPHY….
I THINK THE TIME IS NEAR WHEN ONLY YOUR SITE WOULD BE SUFFICIENT TO CRACK UPSC RATHER THAN PEEPING INSIDE THE BOOKS
I too felt so
Thank You Very Much Sir For Doing this Great Work
Sir if possible arrange lectures for polity and world history…
Ma’m…
In today’s lecture you showed that …. Beacuase of earth’s rotation “missile” goes clockwise in N.hemisphere & anticlockwise in S. Hemisphere” …. Why so?
Plz Explain. Thanks.
Hi,
I am not sure, but it should be due to Corrolis effect..
Thanks
Hmmm…but can’t understand the concept…. :-/ OK. Thanks.
Corriolis effect…its easy to explain…you must have played on a spinning platform…suppose you and one of your friends are sitting diagonally opposite to each other and the platform on which both of you are sitting is rotating and then you pick up a ball and throw it towards your friend so that he catches it down..instead of moving in a straight line,the ball moves in a curvilinear path/projectile…the direction of the curvilinear path certainly depends upon the direction of rotation of the spinning platform…and its in the right path for the ball incase of a counter clockwise rotation and left incase of a clockwise direction..
Winds blow across the Earth from high-pressure systems to low-pressure systems. However, winds don’t travel in a straight line. The actual paths of winds—and of ocean currents, which are pushed by wind—are partly a result of the Coriolis effect.
your answer is in the explanation of corriolis effect.
senario 1- you are at equator (20 degree E latitude a) and your friend is at 60 degree N latitude (20 degree E longitude.)
You threw a rocket towards him if earth was stationary it would have gone straight towards him but earth is rotating so you and your friend and the rocket that is lying with you.both of you are moving to east direction with different speed higher at equator and lower at higher latitude.now you throw the rocket towards him. The rocket will have velocity in both direction that is north (because you threw it to north) and in east ( because you were moving towards east with earth so the rocket while it was launched) now the vector sum of these velocity would be in north east direction.it will seem to you that rocket is drifting towards right instead of going straight.in southern hemisphere situation will just reverse.
senario 2- you are at 60 degree latitude and your friend is at equator and you throw a rocket.since your eastward speed is slower than your friend your rocket will also have slower eastward speed than your friend and when rocket will reach the equator your friend will have moved ahead.from your point of view it again drifted right.
senario 3- you and your friend are at 60 degree N latitude.your and your friend’s speed is same as you are at same latitude but again rocket will be deflecting to right.the explain tigon of this senario is little complex and requires little physics also.
Hi T,
Becoz of earth’s rotational motion and missile’s translation motion it gets an acceleration known as coriolis acceleration.
And the direction is given by rotating the direction of translation motion by 90 degrees in the direction of rotational motion.(If rotation is clockwise towards right & if anticlockwise towards left)
In case of missile fired from earth(North pole or N Hemisphere) it goes upwards(translation motion) but due to earths rotational motion in clockwise direction it gets deflected towards right(here clockwise) & vice versa in case of S hemisphere.
You may have one confusion here about rotational motion of earth. I m clarifying it also if we observe from N pole it rotates in clockwise direction & if we observe from S pole it looks as anticlockwise rotation. I hope u can understand it now. If u still hv any confusion plz do mail me becoz here I can’t upload pictures & Animations related to it.
Thanks!!
Very helpful… Thanks… But if you have the animations than plz give me your email id. I will contact you if require.
sandeep.pacheria1992@gmail.com
I do hv an Animation but it is related to Engineering field & still u can understand. Any doubt feel free to ask.
Thanks
Are you from PDPU coaching?
It looks like I can’t share my email id here. Reply gets moderated. You just search http://www.youtube.com/watch?v=aMpbntC4zqU
I m not from PDPU.
Sir,pls mail me this corrolis concept images
By the way to understand the earth rotation=missile concept let us make an assumption. Assume you are as tall as a tallest tower in the world and you are standing in the equator facing north. From the equator you start walking towards North pole and since the earth rotates from left to right (clockwise) you are also moving (left to right) clockwise . Now come back to the equator and walk towards south pole, now for you the earth will rotate from right to left (anti-clockwise) and hence you are also moving anti-clockwise. The same is applicable to rockets too.
Even to make it much more simple, if you hang upside down by keeping your foot in the roof the clock will seem to you like running in anti-clockwise direction.
sir chalse.. aapde Hindi j joiye..
English mate to bav badhu content che…
Hindi walon ko bhi thoda proud feel hona chahiye..
thanks a lot sir..
Thanks Mrunal Bro for the Geography effort !!
thanks mrunal bro fot the effort to minimise the bharat versus india distance.
great job sir, please provide this types of facilities till the last breathe.
i will pray happy and long life for you and the associated person with you
Mrunal sir how to download this. Videos the videos are not download by tube mate …… Please provide suggestion
copy youtube url and go to http://en.savefrom.net/ and paste the link and download videos in any format you prefer.
Thanks a lot…bhai
@James bond return : download “freemake youtube downloader” it’s awesome and works perfect.
Brother, download vediodownloader from Play store n open YouTube ….
Sorry Bro. Tube vedio downloader ….. go on
friends.. u can download directly from youtube.. just put “ss” before video url you need to download..
for Eg:- https://www.youtube.com/watch?v=OiG7IoTFmUQ this link simply put “ss” before youtube.. so that it becomes
https://www.ssyoutube.com/watch?v=OiG7IoTFmUQ.. upon entering you can download in any format you needed staring from 3gp.. so no
need for any free s/w or constant updates etc.. try it..
Mam
good explanation
pls try to provide medium of instruction – english
thank you sir and please post more lectures for geography esp physical geography in coming time….
your web, giving lot of inspiration to all of as……………thanks lot for above video……………and your effort
Sir we are all in your debt , mere jaise working logon ko preparation asaan karne ke liye bahut bahut shukriya , seeing this effort makes me work even more hard !!!!!! hats off to you SIR JHI !!!! plz keep inspiring us like this , geography mai bahut weak huu aur time na milne se i cannot afford coaching , THANKYOU MILLION TIMES MRUNAL AND TEAM !!!! GOD BLESS
There is problem for downloading geography slides via mediafire..
Anyone downloaded please comment..
i download 7MB slide just 433kb nd stopped..
former download option , link via secure server was batter…
SIR AND MAM, I AM SPEECHLESS I DONT KNOW HOW TO EXPRESS MY GRATITUDE FOR YOU BOTH.
thanks mam for this article hoping for new video
Please also post PDF of video lectures
mrunal sir will these be usefull for ssc cgl?
Thanks a lot . God bless you .
thank u so much its very helpful
Thanks mrunal sir …….pls try to provide polity and world history lectures too :)
Thanx sir
I am self preparing, and it is possible only because of u
Please upload all session if u can
Regards
Thank u sir,
I m self preparing so pls guide me how I do preparation .I dnt knw where to start ..
sir thanku for videos
sir aur bhi teacher ke lecture daal do plzz
baki sub ke
A minor error in the 5th slide ..
Geo graphy means (etymologically) = writing about earth
graphy means writing/to write …
In the 15 th slide was the answer correct ?
Isn’t it the tilted axis responsible for varied day , night and seasons ?
i think ur right also she is forgetting kepler laws of planetary motion ,when she says at two points earth be farthest at one point it should be nearest at other point it shud b farthest .
plz anyone clarify on this
yes. as only that tilt cause day night time variations in different seasons. and upsc answer is D titled axis.
thank u soo much
Thanx sir . Awesom . Also cover geography . It is going to a fabulous work sir . Plz add total geography videos also :)