What name is commonly applied to the Norden countries? A. Land of midnight sun B. Land of fire and ice C. Land of the vikings D. Frozen north

These factors threaten north americas ecosystems

Scientists believe that differences in cause hot, plastic-like rock in the asthenosphere to rise toward earth's surface. a. density c. weight b. magnetism d. composition c. conduction. d. density.

The magnitude of an earthquake is typically calculated according to the scale.           a. mercalli   b. fujita   c. richter   d. saffir-simpson