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Describe how the following cause earth movements:
(i) Isostatic adjustment
(ii) Magma movement in the crust
(iii) Convectional currents in the mantle

Answer Text:
i) This disrupts the balance between the sial and sima causing movement of continental masses
ii) -When magma moves with force pushing crustal rocks horizontally or vertically. -When magma moves from reservoir and leaves empty spaces onto which crustal rocks are pulled inwards
iii) These cause frictional drug/pull on the crustal rocks causing their movement