Catalonia PAU Geology & Env Sci Practice Questions - Catalonia PAU Geology And Environmental Sciences (Geologia I Ciències Ambientals - PAU Catalunya 2026) Exam

The lithosphere is composed of liquid iron, while the asthenosphere consists of solid mantle rock. The lithosphere is rigid and brittle, comprising the crust and uppermost mantle, while the asthenosphere is ductile upper mantle. The lithosphere extends from the lower mantle to the outer core, while the asthenosphere forms the continental crust. The lithosphere is non-tectonic, while the asthenosphere forms Earth's magnetic core.