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"Scientists today think that when the earth cooled the surface cracked to become about twenty huge rafts of rock, called tectonic plates." This resource describes how these plates continue too move and affect the earth's surface.
https://web.archive.org/web/20170917175743/http://www.world-builders.org/lessons/less/les2/tectonic.html
About this resource
ليکندرو
خور تهندرو
چُاپ تهيلُا حق
CC BY / CC BY-SA
