Because they stretch across 4,500 miles, the Mountains are considered the world’s longest mountain range. A. Appalachian B. Rocky C. Andes D. Sierra Madre

Liquefaction is a. a quicksand-like condition arising in some wet soils during earthquakes. b. flooding caused by tsunamis. c. flooding of coastal areas due to tectonic subsidence. d. flooding caused by dam failure resulting from an earthquake.