Summary of Yorktown
Must be a brief summary with at least 4 -6 sentences

What is found within a ranger tower overlooking a drained lake

The layers of earth are based on what two sets of characteristics?

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.