The Mississippi drains most of the area
between the Rocky Mountains and the
Appalachian Mountains. It runs through
two states — Minnesota and Louisiana
— and was used to define the borders of
eight states (the river has since shifted)
— Wisconsin, Iowa, Illinois, Missouri,
Kentucky, Arkansas, Tennessee, and
Mississippi — before emptying into the
Gulf of Mexico about 100 miles (160 km)
downstream from New Orleans.
• North America has a very large river system in the
• The Missouri and Ohio rivers flow into the
Mississippi, thus making them tributaries of the
Commonly defined to
stretch from the Liard
River in British
Columbia, down to
the Rio Grande in
New Mexico. The
mountains can also
be considered to run
to Alaska or Mexico,
but usually those
considered to be part
of the entire American
cordillera, rather than
part of the Rockies.
• The Rockies are young scamps that haven’t faced the
extra 320 million years of erosion that the Appalachians
have suffered and so are much taller.
The broad expanse of
prairie which lies east
of the Rocky
Mountains in the
United States of
America and Canada.
In the Prairies ecozone,
rivers and streams are slow
moving, usually with muddy
bottoms. There are few
lakes, but many marshes
and small shallow ponds.
The Great Plains cover the center
of the continent.
The prairie biome is a
dominated by grasses
and non-grassy herbs
with some woody shrubs
and occasional trees.
Great Plains grasslands
Mid-grass prairie near Manhattan, Kansas
Temperate grasslands are characterized by hot
summers and cold winters. Evaporation rate is high,
so little rain makes it into the rich soil.
Oklahoma City, OK
San Antonio, TX
El Paso, TX
Santa Fe, NM
St Paul, MN
Des Moines, IA
Kansas City, MO