Final answer:
The crust is the thinnest layer of Earth's interior and has an average density of 2.7 grams per cubic centimeter.
Step-by-step explanation:
The thinnest layer of Earth's interior is the crust.
The crust is the outermost layer of the Earth's surface. It is composed of solid rocks and is relatively thin compared to the other layers. The average density of the crust is around 2.7 grams per cubic centimeter.
Learn more about Earth's interior