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Major Landforms
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This lesson has descriptions of different process like weathering, erosion and deposition. It also contains details about work of a river, work of sea waves, work of ice and work of wind.

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
The elevator algorithm (also SCAN) is a diskscheduling algorithm to determine the motion of the disk's arm and head in servicing read and write requests. This algorithm is named after the behavior of a building elevator, where the elevator continues to travel in its current direction (up or down) until empty, stopping only to let individuals off or to pick up new individuals heading in the same direction. From an implementation perspective, the drive maintains a buffer of pending read/write requests, along with the associated cylinder number of the request. (Lower cylinder numbers generally indicate that the cylinder is closer to the spindle, and higher numbers indicate the cylinder is farther away.) Why elevator algorithm? Small office buildings or apartment blocks, which typically don't need to squeeze every bit of efficiency out of their elevators, tend to use this simple approach. ... If each of them follows the elevator algorithm, then under heavy traffic the elevators start leapfrogging each other a few floors at a time.
Sweta Kumari
2 years ago
Wow amazing explanation . keep it up STUDENT:)
mam, Amit here. so my question is regarding sea arches.they have only their roof intact, but after erosion it is converted into walls called stacks.so how come the roof is eroded, when waves only hit the bottom of rocks, roof is higher than the base, so how does water teaches the roof
Mitali M
2 years ago
let me take the liberty to convince you. when the sea cave is formed then sea hollow arch. this arch rest on two sides. the arch may erode by tides or rain. as you can understand it has no base. it is weak portion. it can break even due to tectonic activity. it breaks and erode a bit when sea is rough gradually to form stack. break > erosion to contribute to formation of stalk. hope it helps :-)
Mitali M
2 years ago
stacks
ma'am water hits down side of rocks than how stack can be created from sea arch
Prashant kohli
2 years ago
it forms caves that changes into sea arch
Prashant kohli
2 years ago
then as the arch becomes larger the roof falls and the stack is created
Mitali M
2 years ago
arch is weak resting upon 2 pillar like. weak arch breaks due to rain, tide rough sea, tectonic activity etc. it breaks.
thank u so much , you made things so easy, simplifier of complexity .. thanks a ton
What is the difference between sea cliff and sea arch? Both processes seem to be same.. Can u please explain that?
Ashutosh Singh
2 years ago
sea cliff is left out part after one part is broken out but sea arc is hollow passing through rock
Sea cliff is still intact but it differs from a normal rock as it is in a pointed shape while the sea arch is more of an India Gate like structure where there is some hollow space in between two walls at side and covered by a roof over it. The cliff has no such structure like a roof.
this chapter has loads of technical terms . can you please explain it from the scratch. didn't understood at all .
Mitesh Gajnanda
3 years ago
It would be cleared in Class XI Geography
  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 MAJOR LANDFORMS


  4. MAJOR LANDFORMS s deposition


  5. WORK OF A RIVER wey hased ide, dt ke soas eke


  6. Hard rock fter rock undercut by the power of the water


  7. Mu anda us, those au e the dauge deops tuests and tuem as thiy enteu plains Erasion esrasion LAKE



  8. FLOOD PLAINS Levees Meander


  9. fleadplaime alang its banks


  10. gaa) hie ie S hs coulee tion et sediments tuom au.the men lns touw catlectim ol sediments


  11. WORK OF SEA WAVES and dep ans Condi amol asaeu and wide liki Soa.




  12. WORK 0F ICE erosion and dapasition and and igt dapoitd e dapasits