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\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________
activity
Objective: To understand timekeeping using the sun’s position.
Materials: A paper plate, a straw or straight stick, a marker, and some modelling clay.
Procedure:
Push the straw through the centre of the paper plate. Use clay to hold it upright.
On a sunny day, place the sundial on a flat ground. At the top of the hour (e.g.,
9:00 AM), mark where the straw’s shadow falls and write the hour.
Repeat every hour. You have now made a simple clock that tells time using shadows.
Knowledge Desk
Greenwich Mean Time or GMT is the clock time at the According to GMT
Royal Observatory in Greenwich, London. Country Difference with GMT
It is an international standard time format. India +5 hours 30 minutes
Italy
+1 hour
The differences between GMT and the corresponding Iraq +3 hours
local time in different countries are shown in the table China +8 hours
given alongside.
Brazil –3 hours
Egypt +2 hours
Life Skills RAilwAy TiME-TAblE
Given below is an extract from a railway timetable. Study the table carefully and
answer the questions given below. State the time in terms of the 12-hour clock.
Here, A stands for Arrival Time (in hours) and D for Departure Time (in hours).
Station Duronto Express Rajdhani Express Poorva Express
A Starts Starts Starts
Delhi
D 1240 1655 1740
A 1735 2138 2255
Kanpur
D 1740 2143 2305
A 0055 0445 0650
Patna
D 0105 0455 0700
A 1035 1240 1700
Howrah
D End End End
1. When does the Rajdhani Express leave Kanpur? _______________
2. At what time does the Duranto Express reach Howrah? _______________
3. At what time does the Rajdhani Express reach Howrah? _______________
4. At what time does the Poorva Express depart from Patna? _______________
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