ENVIRONMENTS THROUGH     MAPS (PART 1)
What is an Atlas?• An atlas is a book of maps and usuallycontains  small-scale maps of countries in the world• The world m...
• The bodies of water of the Earth are dividedinto 5 oceans:• the Atlantic, Pacific, Indian, Arctic andSouthern Oceans• Th...
Oceans and                                ARCTICcontinents                                OCEAN        66.5°              ...
Locating Places and Features in an Atlas:                 Latitudes• Latitudes areimaginaryhorizontal linesrunning in anea...
Locating Places and Features in an Atlas:               Latitudes                       • The upper half from             ...
Locating Places and Features in an Atlas:                 Latitudes• Latitudes are measured in degrees from theEquator• Th...
Locating Places and Features in an Atlas:               Longitudes• Longitudesare imaginarylines that runin a north-southd...
Locating Places and Features in an Atlas:               Longitudes• Longitudes are measured in degrees east or            ...
Locating Places and Features in an Atlas: Using Latitudes and                 Longitudes to locate Places• Latitudes and l...
Locating Places and Features in an Atlas:         The International Date Line (IDL)• The International Date Line (IDL) is ...
Time Zone Variations• Places on different parts of the Earthexperience day and night at different timesdue to the rotation...
Time Zone Variations• The nearesttime zone westof Greenwichexperiences 1hour earlierthan Greenwichwhile thenearest timezon...
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Maps part 1 blog

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Maps part 1 blog

  1. 1. ENVIRONMENTS THROUGH MAPS (PART 1)
  2. 2. What is an Atlas?• An atlas is a book of maps and usuallycontains small-scale maps of countries in the world• The world map is a common map found in an atlas which shows the locations of oceansand
  3. 3. • The bodies of water of the Earth are dividedinto 5 oceans:• the Atlantic, Pacific, Indian, Arctic andSouthern Oceans• The rest of the Earth’s surface is made up oflarge masses of land called continents (7 intotal):• Asia, Australia, Europe, North America,South America, Africa and Antarctica Textbook last page
  4. 4. Oceans and ARCTICcontinents OCEAN 66.5° 66.5° NORTH ASIA AMERICA EUROPE23.5° ATLANTIC 23.5° OCEAN AFRICA PACIFIC OCEAN INDIAN OCEAN SOUTH AMERICA AUSTRALIA 23.5° 23.5° SOUTHERN 66.5° OCEAN 66.5° ANTARCTICA
  5. 5. Locating Places and Features in an Atlas: Latitudes• Latitudes areimaginaryhorizontal linesrunning in aneast-westdirection roundthe Earth• The Equatoris longest lineof latitudewhich dividesthe Earth into 2equal halves
  6. 6. Locating Places and Features in an Atlas: Latitudes • The upper half from the Equator to the North Pole is called the Northern Hemisphere • The lower half from the Equator to the South Pole is called the Southern Hemisphere
  7. 7. Locating Places and Features in an Atlas: Latitudes• Latitudes are measured in degrees from theEquator• They increase in value as we move from the Equator to the North and South Poles• The important latitudes are: o (a) Equator (0 ) o (b) Tropic of Cancer (23.5 N) o (c) Tropic of Capricorn (23.5 S) o (d) Arctic Circle (66.5 N) o (e) Antarctic Circle (66.5 S) o (f) North Pole (90 N) Text pg 31 o (g) South Pole (90 S)
  8. 8. Locating Places and Features in an Atlas: Longitudes• Longitudesare imaginarylines that runin a north-southdirection fromthe North Poleto the SouthPole on theEarth’ssurface
  9. 9. Locating Places and Features in an Atlas: Longitudes• Longitudes are measured in degrees east or owest from the 0 longitude which is called thePrime Meridian or the Greenwich Meridian• Longitudes west of the Greenwich Meridian oare measured from 0 at the Greenwich oMeridian to 180 W• Longitudes east of the Greenwich Meridian oare measured from 0 at the Greenwich oMeridian to 180 E• Both 180 W and 180 E lie on the same o olongitude
  10. 10. Locating Places and Features in an Atlas: Using Latitudes and Longitudes to locate Places• Latitudes and longitudes cross each other toform a network of lines or a grid• This grid makes it possible to state theexact location of any place on the Earth’ssurface• To describe the location of a place on amap, we state the latitude first, followed bythe longitude• eg Singapore (position 1.18 oN 103.50 oE) o o: 1.18 north of the Equator and 103.50east of the Greenwich Meridian
  11. 11. Locating Places and Features in an Atlas: The International Date Line (IDL)• The International Date Line (IDL) is the 180 olongitude that lies directly opposite theGreenwich Meridian• our date moves back by one day when wetravel east across the IDL• however our date moves forward by one daywhen we travel west across the IDL• IDL is not a straight line and bends at certain places to allow these land areas to have the same calendar date
  12. 12. Time Zone Variations• Places on different parts of the Earthexperience day and night at different timesdue to the rotation of the Earth• The world is divided into 24 standard timezones:• each time zone represents 15 longitude, or othe distance the Earth rotates in 1 hour• the Greenwich Mean o Time (GMT) at 0 longitude, is the base time zone
  13. 13. Time Zone Variations• The nearesttime zone westof Greenwichexperiences 1hour earlierthan Greenwichwhile thenearest timezone east ofGreenwichexperiences 1hour later

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