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Water: Source and Ocean Circulations
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This lesson contains the details about water cycle,sources of water , it's distribution, ocean circulations like waves,tides and ocean currents.

Arpita Prakash
NCERTs series initiator at Unacademy 'Educator of the Month' for Feb'19 CBSE 0.1% Merit Certificate holder in Mathematics

U
Unacademy user
Thank you Sir. Very good course. Now I am able to attempt questions on algebra with confidence to arrive at answer. Thank you so much.
First of thanks for such a great course Arpita ma'am......but I have a doubt, if Earth is in between the moon and the sun, the gravitational pull should be minimum because both of gravitational pulls are opposite to each other? Let me know if I am wrong.
Ashutosh Kumar
2 years ago
yes i have exactly the same doubt...
Abhay Maurya
a year ago
same doubt
yes . gravitational pull will be minimum when earth is in between moon and sun. But in spring moon will be more closer to earth (due to earth shape) on new and full moon and hence in spring season high tide occurs on new and full moon
Shaurya Garg
a month ago
Same doubt bro.
Hello Mam, How important is the numerical data given in various NCERTs?? Should we consider it while making personal notes?? Example: Amount of water used by an urban Indian per day etc. Thank You
Arpita Prakash
2 years ago
Not all the data given in books needs to be learnt. If you solve previous years questions, it will give you an idea regarding the imp factual areas. However there might be some data which is not imp as a direct question but that might help in analysing stuffs for mains
Gandhar Gavankar
2 years ago
Right Madam, Earleir even I used to ignore the numerical Data bu I sawt there was a question in prelims regarding the exact percentage availability of fresh water .. So now I am a bit confused whether to mug up the exact figures or not
Gandhar Gavankar
2 years ago
Also Madam will you pls tell me whether we can include this data in our mains answers or not ?? Is the data latest and updated ?? Thank you
Arpita Prakash
2 years ago
No NCERTs data are not updated.These are old edition books. So if you find any data imp, look for the current update from internet.
Gandhar Gavankar
2 years ago
Okay thank you .. One more thing Mam, Are we allowed to carry stensils in the exam hall to draw maps in mains??
Arpita Prakash
2 years ago
I haven't given mains, so Don't know that. But I don't think that one gets this much time to use stensils due to time paucity. There is hardly 6-7 minute per ans on an average, so time is the major factor there.
Gandhar Gavankar
2 years ago
Okay Madam .. Thanks a lot for your guidance and replies !!
Arpita Prakash
2 years ago
Pleasure :)
A
Aakash
2 years ago
How to cover geography for other countries
mam awesome but if earth is in between the moon and sun ,the gravitational pull should be minimum because both of gravitational pulls are opposite to each other ?please mam clear my confusion
Swapnil Meena
a year ago
See the gravitational force on any object is proportional to the mass of attracting object, the mass of sun is 27000000 times that of moon. the force therefore doesn't cancel out and hence we experience pull towards the Sun.
mam at full moon tides it seems sun and moon counteracts each other ,it should be lower than neap tides because in neap tides counteractin force at 90 degree but full moon rise counteractin force at 180 pls explain
  1. COURSE: NCERT SUMMARY GEOGRAPHY CLASS VII PRESENTED BY ARPITA PRAKASH


  2. ABOUT ME: . ARPITA PRAKASH B.A HONS HISTORY FROM IP COLLEGE,DU B.ED FROM JAMIA MILLIA ISLAMIA . M.A HISTORY FROM IGNOU CREATIVE ART WORKS, READING AND TEACHING RATE, REVIEW AND RECOMMEND AND SHARE ollow meat https://unacademy.com/user/arpitaprakashz


  3. LESSON WATER Cool subsurface flow


  4. WATER WATER CYCLE change uutuu tuom me tasum to the othu


  5. Condensation Precipitation Run off Evaporation Fig. 5.1: Water Cycle


  6. SOURCES OF WATER dissolund gaLt) 1000 guarns


  7. 97.3 Saline Water 02.0 Oceans Ice-caps Ground water Fresh water lakes Inland seas and salt lakes Atmosphere Rivers 0.68 0.009 Fresh Water 0.009 0.0019 0.0001 100.00


  8. OCEAN CIRCULATION a) wauues b) sias and bau et untas vise and -on the on tha susase at ocuams aut traugh


  9. ans T SUNAMI pasciadieat seise anmd onee au tuiss a day kaw dade whon watou Jalis do du Lotnut


  10. puiu exeuted ty the sum and maon on the sauth's aer maom om tance toure that acts to ide - tuee a month tuu Ahigh tiduu


  11. to highex the utasdd Leas arona Japan and eastaun ceast a Nasuth Amasiica