Geography Series-3

Hey Guys, What’s up? Good to see you are finding this series beneficial. In the last article, we have learnt about Latitude and Longitude.

Today we will have a quick overview of Time and Date.

Ø  Local Time: Earth makes one complete revolution of 360^o in one day or 24 hours, it passes through 15^o in one hour or 1^o in 4 minutes.

o   Earth rotates from west to east, so as we move 1^o towards east, local time is advanced by 15 minutes and vice versa for westward movement.

o   Local time of areas lying east of Prime Meridian is ahead of Greenwich Mean Time (GMT) and those lying westward are behind of GMT.

o   World -divided into 24 Standard Time Zones- each differs 15^o (in longitude)/1 hr (in time) from each other.

o   Indian Govt has accepted 82.5^o E for the standard time which is (82.5^o X 4 minutes = 5 hrs 30 minutes ahead of GMT).

o   US has 6 time zones, Russia has 9 time zones the highest.

International Date Line

 Ø  Imaginary line at 180^o East longitude, demarcating the change of one calendar day to the next. It lies on the opposite side of Prime Meridian

Ø  It is zigzagged to avoid splitting apart countries (such as eastern Russia and Alaska’s Aleutian Islands) into two days.

Ø  When you cross the date line, you become a time traveler of sorts! Cross to the west and it’s one day later; cross back and you’ve “gone back in time."

Question from 1999 Paper

Q1) If it is 10.00 am IST, then what would be the local time at Shillong on 92 degree East longitude?

a) 9.38 am

b) 10.38 am

c) 10.22 am

d) 9.22 am

> This was about Time and Date. With this we are done with the basic information and in the next article we will study interior of earth.

> Please keep telling us how you are finding the series. Your suggestions and reviews are important to us. Help us help you better.

Ciao !