Answer :
the mantle is thickest, about 2900 km, crust is thinnest . ranging from about 6-70 km deep. 2. What are Earth's core and mantle made of? Explain how we know.
the mantle is thickest, about 2900 km, crust is thinnest . ranging from about 6-70 km deep. 2. What are Earth's core and mantle made of? Explain how we know.