Chapter 7: NORTH AMERICA
continent has Rocky mountain ranges to western side and
Appalachian mountains to the eastern coast. In between the
ranges the Great plains are present called Prairies “Granaries
of the World”.
lie in USA and 3 states of Canada. They are temperate grasslands
with nutritious grass known for wheat cultivation and animal
continent has the largest coastline.
1: North America landforms
gas reserves are found in huge proportions in the US.
US has overtaken Russia as the largest gas producer and Saudi
as the largest oil producer. This led to low imports for US
and boosted manufacturing there.
Fig 3: Oil and natural gas reserves
Fig 4: Shale gas reserves
pattern from east to west is cotton and tobacco, followed by
corn and soybean belt and then wheat belt in prairies.
mountains are old fold mountains which are a source of coal –
continent collision led to ocean plate Farallon subdued under
north American plate. This led to extensive volcanism and
formation of rockies. Colorado plateau is also seen.
Andreas fault was formed due to transverse plate movement i.e.
the north American plate moving south west and pacific plate
moving north west.
of USA are Mississippi river, Colorado, Hudson, Rio Grande and
Columbia river. The Rio Grande is at the border of USA and
Mexico. Mississippi is the most important river system in USA.
It is the second largest river after Missouri and empties into
the Atlantic ocean.
lakes are at the boundary of USA and Canada. Lakes are superior,
Michigan, Hudson, Ontario and Erie. It is a largest, freshwater
glacial system. Together holds almost 1/5th of the earths fresh
Michigan is the largest lake fully within a country.
has 4 deserts, 3 on the west coast and 1 along Mexican border.
It has 50 states and 9 time zones.
has a flourishing paper and lumber industry. This is due to
temperate forests, hydroelectricity from rivers and labor. It
also has a large uranium reserve [22% of the world].
Climate is tundra and taiga type.
Fig 5: North American climate zones
- Mexico city is the largest city in North America.
- Only continent that has all types of climate and all types
of biomes i.e. grassland, marine, desert etc
- 24 countries are in it.
- Mount McKinley, Alaska is the tallest mountain.
- Death valley, California is the lowest point on it.
- US second largest coal producer after China. India is 4th
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