PENNSVALLEY
8
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Lesson 4: (cont.)
HowDoWe Use Lines of Latitude and Longitude?
Aren’t you having the time of your life? Speaking of time, the 180° meridian has a special name.
It is called the
International Date Line (IDL)
. It is at this point that the calendar day changes. If you
are headedwest from thePrimeMeridian, and travel 180° across the International Date Line, the day
changes. A new day begins at the International Date Line. For example, if you leave Tuesday, from
Philadelphia on a plane, it is alreadyWednesday in Sydney, Australia.You would set your calendar
ahead one day goingwest. If you are traveling east from theEasternHemisphere, youwould set your
calendar back one day once you cross the International Date Line.
Lesson 5:
Is It Latitude or Longitude?
ACTIVITY:
Classify each phrase as towhether it deals with latitude or longitude.Use the abbreviations lat. or
long. for your answers.Check the information in the reading on pages 5–8 if needed.
1.
imaginary lines that run
west and east on the globe
2.
imaginary lines that measure
distances north and south of
theEquator
3.
imaginary lines that run
north and south on the globe
4.
imaginary lines that measure
distances east andwest of the
PrimeMeridian
5.
International Date Line
6.
180 degreeswest
7.
imaginary lines equal
distance from each other
8.
imaginary lines that meet
at the geographic poles
9.
90 degrees south
10.
imaginary lines that
never touch each other
11.
imaginary lines that are
related to time zones
12.
Equator
13.
Eastern andWestern
Hemispheres
14.
Northern andSouthern
Hemispheres
15.
ArcticCircle
16.
Tropic of Capricorn
17.
10 degrees east
18.
Tropic of Cancer
19.
Antarctic Circle
20.
PrimeMeridian
Geography Skills
