Assertion: mantle | /r/MadeOf | rock
Facets:
Source sentences:
text: Mantles are made of rock or ices, and are generally the largest and most massive layer of the planetary body.
text: Because the mantle and crust are made of rock, the transfer of heat is through convection.
text: Scientists know that the mantle is made of rock based on evidence from seismic waves, heat flow, and meteorites.