The countries of the arab spring are mainly located on which two continents?

7. according to the theory of isostasy, which statement must be true? a. the asthenosphere is denser than the lithosphere. b. the asthenosphere has the same density as the lithosphere. c. the lithosphere has the same density as the core. d. the lithosphere is denser than the asthenosphere.

In russia which of these challenges affects the transportation of both petroleum products and other goods?

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer