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The Great Plains
Vast grassland between the Mississippi River and the Rocky Mountains which appears flat but is, in fact, sloped.

The Rocky Mountains
A great series of mountain ranges in the western United States and Canada which stretches to the Mexico border

cordillera
a region of parallel mountain chains

timberline
the elevation above which it is too cold for trees to grow

The Sierra Nevada mountains
The mountain range that runs parallel to Pacific coastline, from California to Alaska

Mount Whitney
the highest peak in the contiguous United States

contiguous
joined together inside a common boundary
Colorado Plateau
the raise section of land between the Rocky Mountains and Sierra Nevada Mountains

significant
important
The Great Salt Lake
Largest saltwater lake in North America

Colorado River
River in south west US which starts in the Rocky Mountains and ends in the Gulf of California

Continental Divide
an imaginary line through the Rocky Mountains that separates rivers that flow west from rivers that flow east

Rio Grande River
Large river that forms a border between the US and Mexico

irrigation
the process of collecting water and using it to water crops

chinook
a dry wind that sometimes blows over the Great Plains in winter

Ethanol
a liquid fuel made in part from plants

National Park
a park that has been set aside for the public to enjoy for its great natural beauty

Hydroelectricity
electricity generated by running water

Cascade Range
A mountain range with several active volcanoes in northern California, Oregon, Washington, and southern British Columbia, Canada.

Mesa (geographic feature)
a flat-topped mountain or hill often found on plateaus and near canyons

Canyon
a deep, narrow valley with steep sides that are carved by a river through a plateau

Grand Canyon
largest canyon in the world; Colorado River flows through it

Las Vegas
City that gets most water and some of its power from the Hoover Dam and Colorado River

Pacific Ocean
What ocean is on the West Coast of the United States?

Number of people who obtain water from the Colorado River
40 million

Number of acres of farmland that are irrigated by the Colorado River
4 million

Port of Los Angeles / Port of Long Beach
Nicknamed "America's Port"; Largest container port in the United States and 9th largest in the world; handling roughly 40% of all US imports
