At 20:49.. It is the heavier plate that subsides not the lighter plate.. (Note: Oceanic plate is made of basalt and is heavier than the Continental plate which is made of Granite) In convergent plate tectonics, we have 3 cases : Case 1. Ocean Plate- Continent plate convergence : Here the Oceanic plate being heavier subsides beneath the continental plate. The subducted part of the oceanic plate goes into the asthenosphere and due to high heat in the asthenosphere, the oceanic plate melts and its volume increases( density decreases), thereby due to high volume and low density, the magma comes out of the earth's crust from fissures forming island arcs. Trenches are also formed at the point(all along the oceanic and continential plate convergence) where oceanic plate subsides beneath the continental plate. Eg: The Nazca (and, to a lesser extent, Antarctic) plate subducting under the South American Plate, meanwhile, uplifted the Andes and peppered that towering range with volcanoes. Case 2. Oceanic plate- Oceanic plate convergence : Both plates being heavier ( made of basalt) will push each other, but the heaviest plate will subside forming island arcs and trenches as explained above. An example of an oceanic/oceanic convergent boundary is that between the Pacific and Mariana plates, which includes the Mariana Islands arc and a subduction zone encompassing the Mariana Trench, the deepest part of the World Ocean. Case 3: Continental plate- Continental plate convergence: As both plates being lighter( made of granite), none will subside. Both will push against each other, and as none subsides, they will result into fold mountains. ( Jab koi plate niche ni ja skti ek dusre ke against push karke, to common sense kehta hai wo upar ko fold hojayengi) eg: The classic example of a continental/continental convergent boundary is the rumpled overlap where the Indian Plate drives into the Eurasian Plate, a tectonic collision that has thrown up the greatest mountains in the world - the Himalayas - as well as the vast, high Tibetan Plateau. To the west, the Alps grew in similar fashion via the collision of the African and Eurasian plates. Mujhe clear ni hua tha amit bhai ka video dekh k ye topic so I had researched a lot and wrote all this so that i can help someone.. Do thank me 😛

Sir your lectures r free time lectures for me..whenever i get d little bit time during duty hours..your lectures starts ...🙏🙏🙏🙏

You're Teaching Is Better Than Unacademy 😂❤❤

Kids-- Unacademy Men-- Mrunal Geography Legends- Geography By Amit Sengupta Sir😍😌

Sir, the amount of thought and effort you put into these videos shine through in the quality of your content and the clarity it brings to your viewers. I felt geography was never my strong suit and after watching your videos, I feel confident in my grasping the concepts. Please accept my heartfelt gratitude and hope that you will keep the videos coming. :) Raashmi.

I used to get panic attacks always when I have to study geography and you made it a cake walk for me. Thank you so damn much Sir. Thanks alot 🤩

I never thought learning Goegraphy could be this interesting. I always been hated Geography because I couldn't understand even a single topic during my elementary days. But now through your video I'm learning Geography with joy. Amazing speaking skill with illustration! Won't be able to thank you enough for your effort into every video you make. God bless you Sir and keep doing it!

First of all a great thanks to you, for making geography such a easy subject to understand. Sir you are doing a commendable work and reducing the reliance on Coaching centers. God bless you sir. commm

While explaining earthquake and volcano you did not mention even once that it's called Ring of Fire....which is a very important point you missed

You made a commerce graduate understand these difficult aspects of physical geography. Thank you for your incomparable efforts. P.S. You have an amazing voice

Tremendous work really in love with your lecture that is making a complex study soo easy .very unique teaching thanku so much❤❤❤❤❤❤❤❤❤❤

You are a master in explaining complex concepts in the most fluent manner. ( Huge admirer of your spoken English skills)

This is best playlist for ncert geography on you tube.

Wow! After one year of reading Geography from here And there.. Here comes a one stop solution to all the doubts faced by the students:) Thanks a lot sir for making such a brief and easy to understand video☺ Nd your Clear voice makes it more interesting!:)

very impressive video,,amazing,,,i'm following you since 2 month with geo and polity for IAS,,,,speechless video ,,thank u sir

Quality +actual content +concept Cristal clear...🙏🏻☺️thank you so much sir

Amit sir you have done a remarkable job...one of the best ever explainations with illustrations...with due respect...but one mistake is there in Oceanic Trenches...deep Ocean trenches are are formed due to convergent boundaries..not by divergent plates.....basically..when two plates converge out of which heavier plate subduct into the lighter one...and when this happens Trenches forms. Thank you. UPSC 2019 mains qualified. Personality Test awaiting..

I am sure that this helps me because I have a test on two lessons tomorrow I am sure this one will give me hope

U can take on every unacademy or any elite coaching institutes single-handedly man! Thanks for the amazing videos

The explanation was amazing, beyong amazing actually. You make a difficult and a rather dull subject like Geography come alive ! Thank you sir :)

Sir i don't Know how to express my gratitude for u for this geography lessons. Was facing problem in this book. Ppl suggested to watch Mrunal vedios but i found the language of mixing Hindi n English quite problematic as im from NE India who is preparing from hometown n nvr been to Delhi. But trust me i found this vedio today itself n since afternoon I'm listening to u n it feels like geography has nvr been so easy. I'm so thankful. Will be revising Ur vedios till 2020 UPSC exam ends. I wish u all blessings of the world. You have no idea what a great contribution u r doing.

no words sir.... I haven't seen anyone explaining geography in such a lucid manner.. great work..pls do many more videos

Great video Sir. But @6:43 I would like to mention that the trenches are formed when plates move towards each other and not apart! When they move apart, they make mid oceanic ridge. And thank you for the beautiful lecture, sir!

You are such an amazing teacher. I fall short of words to appreciate your teaching skills . Thank you so much !

Awesome class sir. Being a science student I found it so so boring and difficult to understand this chapter. You made it so simple. And also you speak like a foreigner 🙂. Thank you sir

I was studying the chapter just a day before the examination, but still, after I started to watch the video all my queries were solved in no time. And also ended up scoring the highest in geography in all of the eleventh standards. Thank you😊

You teaching like story which we used to hear in our childhood. How fast and easy explanation !❤️

20:49 In all types of convergence, the denser plate subducts, and the less dense plate is either up thrust or folded or both (upthrust and folded). 6:47 Trenches are formed in Convergent Boundaries/subduction zone.

I love these kind of lectures...koi faltu bakwas nhi😉..they really respect our time

Thankful to the person who explained and made very beautiful and nice explanation. There is no disturbance in between no other talks like other materials available on u tube. This is best way of teaching, it makes me continue concentration and nicest to understand.

Love Wegner....if it wasn't for thinking outside the box we would never go to next steps of theories. It explains the old kingdom's being buried. The man did his best before sonar. Now hopefully younger generations will explore

best playlist of geography on youtube.. Thankiewww you very much for making such wonderful vidoes with best explantion sir... God bless You....

Thank you sir. Your way of teaching is incredible sir. Easy to grasp and remember..

sir i am very greatful to u for such a interactive lecture .This video is not less than a lifeline for my soon upcoming exams.once again thank u very much . please keep it up such nice initiative.

Thank you so much for making geography the most interesting subject by excellent lecture, l am proud that I choose geography.😃

Your lectures are blessings for us as of you🎉🎉

Sir, I just liked the way you explain and your voice so clear.. Though I just recently started watching your videos on geography... Iam too glad to see a such good explainer.. Keep going sir.. I have my exam tomorrow and iam absolutely sure that i'll achieve good marks.. Thank you so much sir 😇💙

Beautifully explained....cleared my concepts....thank a ton :)

Dear Sir Your video has everything which a student can ask for. The vast amount of knowledge you have is supreme. The only thing is which i want you to consider is that in some topics give a detailed explanation even if the video goes long because as a non geography student it is very difficult to understand these topics

👍Respected sir, U R A TRUE SAVANT...the efforts that u put in explaining each and every topic is praiseworthy💐💐💐😊..literally sir u just don't read the lines of the book but explains it in remarkable way . I am extremely grateful to you sir for adding pictures and animation as well for our better grasping power. 🙇🙇🙇

I am a student of geology this video help me to clear my doubts thank for this video

best explanation THE BEST EXPLANATION WONDERFUL ..... words fall short for your dedication and hardwork .... you are like a blessing to all UPSC ASPIRANTS.....

obviously i have no words to praise you...this is the video im looking for longtime..clearly explained all hypothesis..thank you so much amit...im expecting your video about silk route and economic corridor of china..

Thank You very much sir for uploading the video today was my exam and a question came about describing the continental drift theory proposed by Alfred Wegner.In the morning today at around 2 o clock I saw your video and it helped me a lot.Once again Thank You very much.I will keep attending your classes from the next session.

Amazing lectures u applied huge efforts and it is now easy to understand for me!!!I recommend your video to all my friends thank uhhh sir!!!!

sir you are doing a very great job..please keep up your work you are helping a large number of students with your videos. god bless you sir! RISE AND SHINE

Good explanation....never thought geography would be so easy....Thank you and subscribed.

One doubt During the rate of plate movement u said there is a arrangement of wires with some tension and when the plate moves it increases But my doubt is that set up is on one plate itself and when plate is moving there won't be any movement between the two points of the same plate isn't ??? Plz clarify

You are a great teacher ❤️. Ur Amazing content shows your hard work . keep going.☺️

Thank you so much for this lecture sir but I have one concern that you taught( 6:46) the ocean trench are formed due to two continental plates move away from each other, But sir I have studied that ocean trenches are formed due plate convergent (subduction zone) . I request to you please give clarification about the concert.

Very understandable video sir bcz u uses some pictures,map this technique really helpful for knowing sub in detail

A brilliant effort to simplify some very complex concepts of geography that too in a very short time. Keep up the good work ! Throughly enjoyed the tutorials sir :)

Thank you so much for such a wonderful explanation!! Please continue posting more such videos!!

Y we were not taught all these things in school ( state boards till tenth class) our education system state board ap/now Telangana is weak compared to ncert ..we were not even taught miniscule of geography .felt like boring in studying geo ...Amit sengupta man of heaven .

6:47 trenches usually occur when two continental plates moves apart....that's wrong...trenches occur when two continental plates meet or collide

23:04 it is the soft mantle and the circular flow of heated material inside the earth which is the ............ force behind the plate movement. Can anyone fill the gap by watching the video at the time mentioned here.

Sir you said trenches formed due to divergence , I was little confused in it,then I checked on google and found the article of national geography that trenches are formed due to convergence of currents or plates

thank you sir for making such a wonderful video its worth watching

Sea floor spreading missing ,You ate intrusive volcanic landforms in previous chapter

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Heard a lot about you but didn't listen to you till now I was so confused after reading ncert this video made me to understand better thanks

i feeling so good that i am able to understand geography very well through your videos you aresuch a great teacher i really want to thank you for making such great videos for us which made me feel confident that geography is easy just because of your easy explanation

Sir u teach in such a good manner. It helps us alot. Just one correction is needed in this video, Trench formed when two place collide with each other not move apart. One plate subducted and another moves upwars there Trench is formed. It is also known as Expression of subduction. Source. Plate tectonic book of Condie. Rest video is 👌

Amazing work sir

clear and specific to the point explanation. Thanks!

The explanation is beyond amazing actually. You make a difficult and a rather dull subject like Geography come alive!

The explanation that starts at 20:45 for convergent boundary is completely wrong. It is always the heavier plate which subducts due to its own huge weight. When Ocean-Continent plate collide, it is always the Ocean plate which sub-ducts and Volcanic Mountains are formed, when Ocean-Ocean plate collides the plate which is larger in length/size will subduct, and Island Arc will be formed. However when a Continental -Continental plate converges, there is no subduction rather they climb over each other and Fold mountains are formed, since there is no subduction occurring here, there will be no Volcanism phenomena in this area. Example Himalayas. Please note that TRENCHES are formed on CONVERGENT boundary(falling/down limb of Convection Current) only, that too only in the two cases of Ocean-Ocean and Ocean-Continent plates, because subduction occurs for only these two cases. RIDGES are formed when the DIVERGENT boundary(rising limb of Convection Current) is under Ocean plate. RIFT is formed when the DIVERGENT boundary(rising limb of Convection Current) is under Continental Crust. This RIFT then transform into NASCENT SEA and finally transformed into OCEAN.

sir, a trench is a kind of feature that is not formed by 1 divergent plate, rather it is formed when 2 plates preferably 1 oceanic plate and 1 continental plate converge and the oceanic plate subducts under the other... 8:58

Sir, i became a fan of your teaching!! Thank you sooo much sir!!

awsome. sir I really appreciate you effort. please do continue with the course

awesome video you made this lesson so easy to learn .I am so thankful to you and i you have got a great accent too.Please keep uploading...:)

Great job ! .. impressive nd easy to understand

thankyou so much sir..these video helps a lot..and thanks for doin so much of hard work..

Sir,According To Plate Tectonics The Lithosphere Is Divided Into Plates i.e. 7 Major Plates And 9 Minor Plates i.e. Cocos,Nazca,Arabian, Philippine,Caroline, Caribbean,Juan De Fuca, Bismarck Or Fuji,And Scotia Plate. But U Have Mentioned 7Major &Minor Plates Only..

you explain very briefly and concise ...........if you explain in detailed manner it will more appreciating

JUST WOW !!! REALLY ENJOYING WHILE WATCHING UR VIDEOS. IT GIVES ME CONCEPTUAL CLARITY JST BCZ OF OF PRESENTATION STYLE ( EXPLANATION + PICTORIAL PRESENTATION)

Thank you so much sir..kudos to your efforts..:)

Thanks for the amazing series. A small amendment at 6:45 trenches are formed when plate boundaries converge, let me know if I got it wrong.

thnx sir......plz upload videos for all chapters of that ncert.......thnx alot

Amit sengupta thankyou so much for your lectures

sir the concept of plate tectonics is the part of post drift studies?

Wow super even south indian stdnts also easily can understand.tnk so much sir

ty sir...😊 was waiting for it

thanks a ton sir for the efforts you are making to make everything crystal clear to students like me...

Sir is very nyc...bot accha padhtae hai..🙏🏻🙏🏻🙏🏻🙏🏻

Thank you so much sir. Your videos really helps understanding the difficult topics in geography with ease...

Sir your videos are just awesome.......and the simplicity and easiness. I just love it

at 6:45 They (Trenches) usually occur when one plate (usually oceanic, denser) subducts under another lighter plate (usually continental)

plate having high density will subduct under low density plate if I am right. that's why trenches formed when high density oceanic plate subducts under low dense continental plate. and when two continental plate collides fold mountains will rise. you mentioned small plate will subduct. . correct me if i am wrong

Sir u r brilliant teacher thanks a lot sir

Thank you sir....I got a new ray of confidence by your videos

sir yesterday was my exam and this video helped me alot thank you for uploading this video

Sir, thanks for the videos. Just a point - continental drift theory and the post drift theories are not two entirely different theries right? Post drift theories also prove that continents move from each other because of the convection currents under the earth while at the time of drift they focused on other aspects to prove rather than give reasons.

Thank you sir, you have made me fall in love with the subject I used to fear from.

Thank you so much sir.. am really feeling blessed that i have found this playlist 🙏😇

Thankyou so much sir 🤗.You really teach osm..😊😊❤️

sir please complete whole book as soon as possible.It is very useful for us.

1)what is meant by flank zone in mid oceanic ridge ?? 2) If deposition is taking place in abyssal plain ,then what is the difference between continental rise and abyssal plain??

Excuse me sir, could you elaborate on Transform Boundaries and the mention of rotation of earth in the section. Especially the last two lines of the paragraph of Transform Boundaries. Thank you.

There is nothing in this video.. except your beautiful voice and good picture quality