Ocean ridges form as a result of a. slab pull b. the upwelling of magma from the asthenosphere sediment being deposited from the ocean d. all of the above

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

The english language is part of which language family? a. alatic b. dravidan c. indo-european d. khoisan

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust