Grade 12 Study Guides T. Holomisa, E. M. J. C schaller, D. J. Brown, B. de Klerk

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Gr12-Tourism-Study-Guide LR

1.6 Seasons

Seasons are the four divisions of the year spring, summer, autumn and winter. The four seasons are the result of Earth’s changing position with the sun.
1.7 Standard time

The local time at the standard meridian of a country is called standard time. Standard time is the same for all places in that particular country and is calculated from Greenwich.
1.8 Local time

Local time is the specific time at any given place. is the time everyone in an area agrees upon as the local time.
1.9 The International Date Line (IDL)

The International Date Line (IDL) is an imaginary line on the Earth’s surface at 180° longitude.
1.10 The hour clock

The hour clock is a convention of timekeeping in which the day runs from midnight to midnight and is divided into 24 hours, indicated by the hours passed since midnight, from 0 to 23. This system is the most commonly used time notation in the world today.
1.11 Latitude and longitude

A geographic coordinate system is a coordinate system that enables every location on the Earth to be specified by a set of numbers. They lie east and west of the Greenwich Meridian and divide the world into 24 time zones.
2. Introduction to a world timezone map
The map shows the different time zones around the world.

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3. Daylight saving time (DST)

DST is away of making better use of daylight by setting the clock ahead during summer months thus losing one hour) when DST starts, and setting it back again one hour in the winter months (thus gaining one hour) when DST ends. Reasons for implementing daylight saving time are

• Some countries feel they can make better use of the extra daylight in the evenings.
• Some countries are of the opinion that fewer road accidents and injuries occur because of better visibility.
• The extra hour of daylight in the evening can give children more time for social activities.
• The extra hour of daylight in the evening may boost the tourism industry as it creates an opportunity to increase participation in outdoor activities.
• It can help to save energy and reduce artificial lighting during the evening hours.

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