1. which of the layers below are defined as a layer by its physical properties? a. crust b. mantle c. outer core d. core
2. earth’s magnetic field is generated by the convection of the: a. lithosphere b. asthenosphere c. mesosphere d. outer core e. inner core
3. when hiking down most shield volcanoes, which rock composition(s) will you see from its base to its summit? a. felsic at the bottom, intermediate in the middle, and mafic at the top b. mafic at the bottom, intermediate in the middle, and felsic at the top c. intermediate from bottom to top d. mafic from bottom to top