How are the Earth's mantle and crust similar?

Actually the only similarity between the crust and the mantle is that both of them are rock material. The crust is made up of tectonic plates which float over the asthenosphere [molten rock/a liar of the mantle]. There is great variation is the characteristics of crust and mantle. The crust is way too cooler that the mantle. read more

The interior of Earth, similar to the other terrestrial planets, is divided into layers of different composition. The mantle is a layer between the crust and the outer core. Earth's mantle is a silicate rocky shell with an average thickness of 2,886 kilometres (1,793 mi). The mantle makes up about 84% of Earth's volume. read more