14
Look at Figure 4. Can you see
theverticlelines?
These lines are called lines of
longitude.
Lines of longitude are drawn
East and West of a vertical line
that passes through a place
called Greenwich in London
(United Kingdom).
This line is numbered 0º
and is called the Greenwich
Meridian.
The Equator divides the Earth into two hemispheres, the Northern Hemisphere and the
Southern Hemisphere. Mauritius and Rodrigues are found in the southern hemisphere.
Inwhichhemispherearethefollowingcountriesfound:Madagascar,IndiaandAustralia?
Lines of latitude are numbered
(i) 0º to 90º North from the Equator to the North pole, and
(ii) 0º to 90º South from the Equator to the South Pole.
In Figure 3 on page 13, observe the dotted lines showing lines of latitude 23 ½º North and
23 ½º South of the Equator.Whatarethenamesgiventothesetwolinesoflatitude?
Name the two other lines of latitude 66½º N and 66½º S shown in Figure 3.
The other lines of longitude are numbered
(i) 0º to 180º East of the Greenwich Meridian
(ii) 0º to 180º West of the Greenwich Meridian
EastWest
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London
fig. 4 globe with lines of LONGITUDES
1.5 What are Lines of Longitude ?
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