Geologists can use waves to learn about Earth’s interior. P waves travel faster than S waves. S waves travel through solids only, which tells geologists that the core is liquid. Geologists call the outer, solid area of Earth the crust; the next layer is the . Finally, at the very center, is the core.

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

i would say it is the roman empire europe after the norman conquest.