Gross domestic product is used to measure a country’s total a. costs b. welfare c. production d. population

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal

Weathering is an example of an external force of change. question 2 options: true false