During the 1970s, the population of the south increased greatly because of -- a. the discovery of oil in eastern texas. b. increased farm productivity. c. job opportunities in industries that had moved south. d. the migration of many europeans to the region.

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.

As water is cooled from 4 c to 0 c its density

Explain how the movement of tectonic plates causes the development of different landforms and naturak disasters