Question

large piece of earth crust?

Answer 1

The tectonic plates are made up of Earth's crust and the upper part of the mantle layer underneath. Together the crust and upper mantle are called the lithosphere and they extend about 80 km deep. The lithosphere is broken into giant plates that fit around the globe like puzzlepieces

Answer 2

the crust and upper mantle are called the lithosphere and they extend about 80 km deep.