Distribution of Oceans And Continents

  • Question 1
    CBSEENGE11010344

    What was Pangaea according to Wegener?

    Solution
    According to Wegener, all the continents formed a single continental mass, a mega ocean surrounded by the same. The super-continent was named Pangaea, which meant all earth.
    Question 2
    CBSEENGE11010345

    Who first propounded the theory of continental drift and when?

    Solution
    Alfred Wegener in 1912 first of all propounded the theory of continental drift.
    Question 3
    CBSEENGE11010346

    Mention the major plates of the earth.

    Solution

    The major plates are as follows :
    (i) Antarctica and the surrounding oceanic plate
    (ii) North American (with western Atlantic floor separated from the South American plate along the Caribbean islands) plate
    (iii) South American (with western Atlantic floor separated from the North American plate along the Caribbean islands) plate
    (iv) Pacific plate
    (v) India-Australia-New Zealand plate
    (vi) Africa with the eastern Atlantic floor plate
    (vii) Eurasia and the adjacent oceanic plate.

    Question 4
    CBSEENGE11010347

    Which plates are composed of mainly oceanic crust ?

    Solution
    Zone of divergence are boundaries along which plate is composed of mainly oceanic crust.

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