Explain how elasticity, ductility and/or brittle nature of various types of rocks and rock layers can be observed.

Relatively steep zone that is compared with the shelf that marks the boundary between continental crust and ocean crust.

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.

Suppose you had to resolve the problems believed to be caused by distance decay in russia. what would you suggest?