PSNB+6.1

toc =6.1 Exploring Earth's Surface(pg. 172)=

Outline
Elevation Relief
 * Topography**
 * Lewis/Clark traveled across n. america
 * 5.000 Kilometers
 * Topography determined by three factors
 * Elevation, relief, and location
 * Lewis/Clark travelled to St. Lewis
 * 140 meters above sea level
 * Expedition-rocky mountains-changed relief
 * mountains-high, flat land-low