L-5 The Realms of the Earth(Part-2) Class 6th D.A.V
This video is about major landforms . There are three major landforms . Mountains , plateaus and plains .
Landforms - the differences in the height and slope of the land surface is known as relief for landforms .
Mountains - A mountain aur Hill is an uplifted portion of the land .
Peak - uppermost portion of a mountain or hill forms peak .
Range - most of the mountains are arranged in a line called range which has a series of peaks a n d valleys .
Old mountains - those mountains which have worn by the forces of nature and do not have sharp peaks .
Aravalli range in India
Ural mountain in Russia
Appalachians in USA
Young mountain - this mountain have very high and sharp peaks covered with snow recently formed near about 2 5 million years a g o .
e g - The Himalayas in Asia , The Alps in Europe , Andes in South America and Rockies in North America .
Plateaus
A plateau is an applied with rugged surface .
( a ) the average height of a plateau is about 600 metres from the sea level .
( b ) nearly 40 % of total land surface of the Earth is plateau .
(i) Plateau of Tibet is called roof of the world height is about 5,000 metres above the sea level .
(ii) the Deccan Plateau in India
(iii) the Arabian plateau
(iv) the Brazil plateau
Plains : - It is a relative leelo lying flat land.
(a) the average height of a plane is between 100 to 200 metres above the sea level.
(b ) Plains are densely populated
(c) fertile soil
(d) ideal climate
Formation of plains : -
Most of the plains in the world have been formed by river . The rivers carry away large amount of silt and sediments from the mountains and deposits in the low lying areas to form plains .
e . g ( a ) Northern Plains of India have been formed by the Ganga river.
(b) China plane have been formed by yellow river.
(c) Egyptian plain - Nile river
(d) Iraq plain - Tigris
Importance
1 . Lithosphere is the basic source of minerals essential for the needs of human being . Minerals like various metals ; oil etc are extracted from lithosphere.
2 . Lithosphere has the soil cover on which the crops are grown which give us food and oxygen .
3 . Lithosphere being the land mass support all these structures like Building , roads , rail etc .
4 . Lithosphere support the plant and animal life which help to main ecosystem in nature .
1. Test of L-10
https://docs.google.com/forms/d/e/1FAIpQLSdyJz3PTFwmsjyhjFFl5L3G77SlP-7UniRDfDEWq4gJi8yTDw/viewform?usp=sf_link
2. test of L-12
https://docs.google.com/forms/d/e/1FAIpQLScXpOy3KJLWo_v0wirMIo23RXCnQ4vuL8PKJ7FQN1gPgeJS5w/viewform?usp=sf_link
3. Test of L-21
https://docs.google.com/forms/d/e/1FAIpQLSdZvJkMHY7Oz1FROEIQpzi-8BDLdc_llZc9aRm1dbe8voAaXA/viewform?usp=sf_link
4. Test of L-3
https://docs.google.com/forms/d/e/1FAIpQLSfgPrxREg6eRnO2mga4rdT_fW_eJ5XUKwf_iNm6TFFHmocBgA/viewform?usp=sf_link
5. Test of Representation of the Earth
https://docs.google.com/forms/d/e/1FAIpQLSfMmzb9tCoxTnbjIfJ6Rdb1sMeKoxpyN25N7p4g3cIrao9foQ/viewform?usp=sf_link
6. Test of Chapter-1
https://docs.google.com/forms/d/e/1FAIpQLSdn9bvMvzRktAItRlZhIJjv2X4qX4QM3MVw_7G5NU-Bt6YdJA/viewform?usp=sf_link
7. Test of L-10(Different from 1.)
https://docs.google.com/forms/d/e/1FAIpQLSdvHkbMc_Wuclp58I3_PWc8rn39iLRAhGabXtcjQg_iTAXftA/viewform?usp=sf_link
8. Test of L-11
https://docs.google.com/forms/d/e/1FAIpQLSdvHkbMc_Wuclp58I3_PWc8rn39iLRAhGabXtcjQg_iTAXftA/viewform?usp=sf_link
9. Test of L-4
https://docs.google.com/forms/d/e/1FAIpQLScJijmBH3mNfHAT2TEWNIk1wHbt8rlsjJasCxLoMFoV_3G0cQ/viewform?usp=sf_link
10. Test of L-8
https://docs.google.com/forms/d/e/1FAIpQLSewY-OslIFMuy4MO5amP0-m1PP_Sw2s_PjEQCZaO-SJtlmbQQ/viewform?usp=sf_link