a thin layer of the Earth, located in the upper mantle on which the Earth's plates rest and move

theory that the continents are able to move and drift freely on the surface of the Earth

{Alfred Wegener's Theory}

innermost part of Earth; is made up of the inner and outer core

composed of iron and nickel, this liquid surrounds the solid inner core

the outermost layer of Earth's surface, it is broken into large pieces called plates

[range from 5 km to 75 km thick]

strong outer layer of Earth, made up of the crust and upper mantle.

This layer is divided into 12 major plates and many smaller ones

name of a supercontinent that is believed to have existed before the continents drifted apart

[proposed by Wegener as part of the continental drift theory]

theory that the crust of the Earth is broken into large pieces called plates that are being pushed and moved through convection currents in the Earth's mantle

molten rock at or above the Earth's surface

molten rock below the Earth's surface

part of a crustal plate that tends to be thicker and less dense than the oceanic crust

 a tectonic plate that tends to be thinner yet more dense than  continental crust

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