Answer:
Cultural Characteristics : Human features of the land
Headwaters : The source of a river
Hydroelectric: Electricity that is produced by water
Physical Characteristics: Natural features of the land/natural to the environment
Spatial Pattern: Places that share common features
Temperate : Mild (Climate)
Tributary : Snow melting into streams, into larger streams, into rivers
Commerce: Trade and travel
Lowlands : A dry streambed
Pacific Rim: An economic region where all countries border the pacific ocean
Plateau : High, Flat land
Region : The location and arrangement of natural and human features of the land.
Coulee : Plains and valleys (of the Puget Sound)
Dormant: Inactive
Fault : Fracture in the Earth's crust
Lahar: Large mudflows with boulders and uprooted trees
Loess : Mix of volcanic ash and dust carried by wind
Molten: Liquid
Subterranean : Underground
Tectonic : Forces within earth that cause movements in the crust
Fossil fuels: Underground deposits of coal that can be burnt.