GY 101 - GY 101—Dixon Day 2. Required Reading: Units 2, 3...

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Unformatted text preview: GY 101—Dixon Day 2. Required Reading: Units 2, 3 (esp. pp 20-35) Earth Sun Relationships---review of basic components of the earth. - Land covers about 29% of Earth’s total surface area p21- Disproportionate of land surface are in the northern hemisphere- “land hemisphere” =/ Northern Hemisphere. (p 24) The “Continents”- Continent= large continuous landmass- Early Greeks saw the world as encompassing 3 land areas- Europe, Asia, and Africa—and recognized that they were physically conjoined but chose to view them as separate entities. 3 Continent Model - Recognizes Africa-Eurasia as the world’s largest landmass- Africa-Eurasia, Americas, Antarctica 7 Continent Model- Model generally taught in US schools and Western Europe- Europe, Asia, Africa, North America, South America, Antarctica, Australia 6 continent model utilized by your text (know this one)- influenced by tectonic plates- Eurasia, Africa, North America, South America, Antarctica, and Australia Ranked by Aerial Size 1. Eurasia 37% of Earths’s land surface area 2. Africa 20% N. America* 16% S. America 12% Antarctica 9% Austrailia <6% *N.A. includes Greenland, Canada, Mexico, Central America, and USA Mercator projection of the world- Developed in 1569 for navigational purposes.- Shapes Correct, but a rectangular map o Polar regions are severely stretched o Areas increasing distorted poleward. 1 Earth’s Surface Waters- Water makes up about 71% of the erath’s total surface area- Much of this contained within the so-called “7 seas”- Pacific Ocean, Indian Ocean, N. Atlantic Ocean, S. Atlantic Ocean, Southern Ocean, Artic Ocean, Mediterranean Sea. - Disproportionate share of water surface in the southern hemisphere (when compared to N. H.)- Water Hemisphere =/ Southern Hemisphere. Oceans according to Wikipedia ( know ) 1. Pacific 2. Indian 3. Atlantic 4. Southern 5. Arctic? Pacific Ocean:- Worlds largest Body of Water o Nearly ½ water surface area on earth o About 1/3 total surface area on earth o About 3 times larger than Eurasia. Robinson Projection. ---kinda rounded out. Seems more accurate Atlantic “Oceans”:- Your text views Atlantic as two distinct ocean bodies due to: o S. Shape o Different circulation systems Indian Ocean- Probably the ocean least familiar to students in the US. Southern Ocean:- Encircles Antarctica- Defined but the Antarctic Circumpolar Ocean Current- Name chosen in 2000, not universally adopted. Arctic Ocean:- Smallest and Shallowest “ocean”- A “Mediterranean Sea” ---a mostly enclosed water body with limited exchange of deep ocean water. Shape of the Earth- Generally labeled an oblate spheroid (p. 59) 2 o “Spheroid”= resembles a sphere o “oblateness” = polar flattening (and equatorial bulge)- Sometimes described as an oblate ellipsoid....
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This note was uploaded on 04/15/2008 for the course GY 101 taught by Professor Dixon during the Summer '07 term at Alabama.

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GY 101 - GY 101—Dixon Day 2. Required Reading: Units 2, 3...

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