Final answer:
The huge pieces of the Earth's crust are called the continental crust and the oceanic crust. The continental crust is primarily composed of granite and covers 45% of Earth's surface, while the oceanic crust is composed of basalt and covers 55% of Earth's surface.
Step-by-step explanation:
The huge pieces of the Earth's crust are called the continental crust and the oceanic crust.
The continental crust covers 45% of the Earth's surface and is typically 20 to 70 kilometers thick. It is primarily composed of a volcanic rock called granite.
The oceanic crust covers 55% of the Earth's surface and is typically about 6 kilometers thick. It is composed of volcanic rocks called basalt.