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symbo symbo
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Posts: 1970
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7 years ago
The present structure of the surface of the Earth is

(a)   a series of large slabs or plates which are moving relative to one another.
(b)   two large slabs or plates, the Pacific and the African plates, which are rotating and colliding with each other.
(c)   a solid crust which is occasionally disturbed by earthquakes but otherwise remains as a single unit.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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hyponoticahyponotica
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Posts: 1396
7 years ago Edited: 7 years ago, bio_man
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