| Because a hot spot, like Hawaii, is a constant flow of magma under the earth's crust and as the magma is forced up it creates volcanos then island, but as the plate moves the flow of amgma stays the same so thus creating another island and so and so on, so to really answer ur question plate motion is important because w/o a plate to move u would have just a HUGE island w/ one volcano w/ a constant flow of magma creating it. |