which of the earth's layers is broken into several large tectonic plates?
The portion of the Earth that is broken into tectonic plates is the? The portion of the Earth that is broken into tectonic plates is the Lithosphere. It's not one solid sheet but broken into slabs called plates. They are in motion and â¦ drift over the asthenosphere. It's a lot like a slab of ice drifting over the surface of a lake.