In the late 1800s, which country faced the greatest challenge remaining unified with a large variety of ethnic groups seeking independence within its borders?
O France
o Germany
Britain
O Austria-Hungary
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Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

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.

If the basis of an isosceles trapezoid have lengths of 11 and 26, what is the length of the median?