Match the layers of the earth to their proper composition. inner core a) liquid rock
asthenosphere b) solid iron
lithosphere c) liquid iron
outer core d) solid rock

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity