Page 193 - 9 teachers social book 9 @ 2077 ctp_Neat

Activity

Look at the following figure. N at the centre denotes the North Pole, which is the
point of the earth, when we see from its upper part.

Discuss why we should advance our clocks on if we travel to east and why we
should put back our clock if travel to west.

when travelling from W to E
Clock are advance

DAY 15°E 1300hrs

NIGHT N 15° 0° Noon (12hrs)
Meridian 15° W 1100 hrs

when travelling from E to W

Clocks are put back

Exercise

Answer the following questions:
1. Differentiate between local time and standard time.
2. Why have the countries like USA, Canada, Russia adopted more than one
standard time?
3. What will be the time in Japan located at 135°E longitude when it is 12 noon in
Kathmandu located at 85°E longitude?
4. Local Time within the same country varies from one place to another. Give reason.
5. What is the standard time of Nepal? How is it calculated?

Community Work

Visit a family in your community whose family is living abroad. Find out the time
differences of that country and Nepal. Also ask them at what time they contact their
family member. Prepare details and present it in your class.

193 Dynamic Social Studies - Book IX