5.1 landforms and resources
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Transcript of 5.1 landforms and resources
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Landforms and Resources:
North America
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North America. It’s here:
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Right now, we’re just concerned with the United States and Canada
• These are the Anglo American parts and have a similar culture as later we’ll discuss Mexico.
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Varied landforms
• North America has a wide variety of landforms. It has mountains, plains, deserts, tundra, etc. Let’s look at a few.
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The Eastern Lowlands
• Flat level land by the eastern and Gulf coastal areas.
The brown area along the coast is lowlands.
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Appalachian Highlands
• Mountain chain that runs along the eastern U.S.
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• The Appalachians are relatively old.
• Because they’ve been around for a long while, they’ve worn down and aren’t all that tall: they average 3,000 feet and the tallest peak, Mt. Mitchell in North Carolina is just 6,684 feet tall.
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The interior lowlands
• Covers most of North America
• Relatively level
• May have been hilly at one point, but glaciers leveled it out during the last ice age
• Also carved out rolling hills and lakes
• Includes the Great Plains
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• Also includes the Canadian Shield in Canada
• Huge area around Hudson Bay
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Rocky Mountains
• Large western mountain chain.
• 78 peaks of 12,000 feet or more above sea level
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• The Rockies are young and haven’t faced the extra 320 million years of erosion that the Appalachians have suffered, so they are much taller.
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• The rain runoff and annual snowmelt from the Rockies also supply nearly ¼ of the U.S. with fresh water.
Winter
Summer
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• Cold reflective mountain reservoirs. Makes you want to go there, doesn’t it?
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Continental Divide
• All rivers flow either east or west. The continental divide is the line at which they go one way or the other.
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Islands
• Canada has a nice assortment to the north in the Arctic Ocean.
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• There’s also the Aleutian Islands tailing off of Alaska
• Did you know that during WWII, two small Aleutian islands at the tail end were captured and held by the Japanese?
• It was the last time a U.S. enemy invaded and held American soil.
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• There are also the Hawaiian islands, but while they are part of the United States, they are not part of North America.
• All the same, they’re beautiful and I will use this excuse to put up some beautiful pictures of the islands.
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Jurassic Park falls
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Back to facts…
Resources
• North America is blessed with lots of natural resources. Among them:
• Water
• It’s got oceans or seas on four sides (Arctic, Atlantic, the Gulf, and Pacific) which is good for fishing and trade
• It’s got plenty of lakes including the…
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• Great Lakes
• On a trivia item, note that Lake Michigan is the only great Lake that’s entirely within U.S. boundaries. The rest are shared with Canada.
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• Nearly 20% of the earth’s fresh surface water is in the Great Lakes.
• It’s about 6 quadrillion gallons. That’s 6,000,000,000,000,000.
• It’s enough to cover the lower 48 states with 9.5 feet of water.
• That’s a lot of water.
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And they look pretty from space.
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• Rivers
• North America has a very large river system in the Mississippi-Missouri-Ohio
• The Missouri and Ohio rivers flow into the Mississippi, thus making them tributaries of the Mississippi
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• North America also has lots of forests for timbers, lots of minerals, oil, natural gas, and a ridiculous amount of coal.
• The oil sands of Alberta are estimated to hold up to 180 billion barrels of oil, second only to Saudi Arabia’s 259 billion barrels.
• The trick is profitably getting the oil out of the sands.
• As for coal, the U.S. has so much that it’s estimated that even with increased demand, there’s enough to last us another 300-400 years.
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