The global occurrence of earthquakes reveals that a. they prove that Earth is splitting apart (rifting) at all plate boundaries. b. they usually occur at the center of plates. c. they usually occur on the boundaries of plates or at hot spots. d. their locations are randomly scattered.

Fertility and mortality rates are higher in more developed nations.

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

Acountry’s gdp is the total dollar value of all final goods and services produced within a country’s borders in a given year. it also determines how countries are classified. which of the following is not a classification based on gdp? a. developed b. developing c. least-developed d. potentially developing