My presentation about (time)

1. Time
Presentation about time

2. Outline
Time Introduction -
History of Time Measurement Device -
World Time -
Time Zone -
Greenwich Mean Time -
Time Management -

3. Time Introduction
Time is a part of measuring system used to
sequence events , to compare the durations
of events and intervals between them , and
to quantify rates of change such as the
. motions of objects

4. Time Introduction
Time is one of the seven fundamental physical
quantities in the International System of Units
, it also used to define other quantities - such
as velocity - so defining time in terms of such
quantities would result in circularity of
.definition

5. History of time measurement
devices
” : “Horizontal sundial
An Egyptian device dating to 1500 BC, similar
in shape to a bent T-square , measured the
passage of time from the shadow cast by its
.crossbar on a nonlinear rule

6. History of time measurement
devices
: The Hourglasses
The Hourglasses uses to flow of sand to
. measure the flow of time

7. History of time measurement
devices
A pocket watch is a watch that is made to be
.carried in a pocket
They were the most common type of watch
from their development in the 16th century
. until wristwatches became popular

8. History of time measurement
devices
A watch is a small timepiece, typically worn
. either on the wrist or attached on a chain
They evolved in the 17th century from spring
powered clocks, which appeared in the 15th
.century

9. World Time
Time keeping is so critical to the functioning of
modern societies that it is coordinated at an
international level. The basis for scientific
time is a continuous count of seconds based
on atomic clocks around the world, known as
. the International Atomic Time

10. Time Zone
A time zone is a region on Earth that has a
uniform standard time for legal, commercial,
and social purposes.
In order for the same clock time to always
correspond to the same portion of the day as
the Earth rotates )for example, the sun being
. )at its highest point every day around noon

11. Greenwich Mean Time
Greenwich Mean Time is a term originally
referring to mean solar time at the Royal
.Observatory in Greenwich, London
it‘s especially used by bodies connected with
the United Kingdom, such as the BBC World
Service, the Royal Navy, the Met Office and
.others

12. Time Management
Time management is the act or process of
exercising conscious control over the amount
of time spent on specific activities, especially
to increase efficiency or productivity.
it may be aided by a range of skills, tools,
. and techniques used to manage time