2. TIME
 Identifies a measurable period during
which an action, process, or condition
exists or continues to exist.
 It is described in terms of periods of
time (e.g. age, epoch, era, years) or in
precise dates

3. Time (Before you begin to moan, you only have to write what is in bold on this slide.)
 Is an abstract human concept
 Can mean all of the past, present, and future taken together, or
it can refer to only part of that span
 Refers to a measurable period in which people, actions or
conditions exist
 Is divided by humans to organize and coordinate our activities
 Has lead to man inventing tools to measure it (clocks,
calendars, etc.)
 Can be used to describe an occasion
 Is a valuable tool or device used by man
 Is the fourth dimension in which objects exist (length, width,
depth)
 In summary, the concept of time is used to organize
people’s lives and create a context in which humans exist.

4. Absolute Time
 Is a precise
measurement.
 Can refer to specific
events, dates or
moments.
 Uses numbers and is
exact.

5. Examples
 Mrs. G was born on May 11, 1978.
 The power went out at 5:23 and 6
seconds.
 The bank opens at 9:30.

6. Relative Time
Is time
measured in
relation to other
things

7. Examples
 Mrs. G was born during the era of big
hair
 The power went out during Seinfeld
 The bank opens at the same time as the
mall

8. Man and Measuring Time
Throughout history, man
has devised many ways
of keeping time
Examples:
 Sundial: A device for
telling time of day by the
shadow which sunlight
produces on the
instrument.

9.  Ropes: When burned, knots tied at
regular intervals would measure time.
 Candles: The candles would have
grooves carved into them and, when
burned, each groove represented a
specific amount of time.

10.  Hourglass: It tells time by
means of sand trickling
through a narrow opening.
 Water Clock: It measures
time by allowing water to
drip from one marked
container into another.

11. Mechanical
Clocks: They
were invented
in 1656.

12. Cyclical Time and Linear
Time
Cyclical Time
 Based on the cycles of nature.
 Repeats over and over in a cycle.
 Is a measurement of natural cycles and
is an attempt by humans to live in
harmony with the cycles of nature.

13. Cyclical Time cont’d
 Days – are based on the rising and
setting of the sun.
 Months – are based on the cycles of the
moon.
 Years – are based on the Earth’s cycle
around the sun.

14. Three
examples of
cyclical time
measurement:
1. Stonehenge:
Is located on the
Salisbury
Plain in
southern
England.
Allowed for some
measurement
of cyclical
time.

15. 2. Medicine Wheels:
 Are found on the
prairies of North
America.
 Were built by the Plains
Indians.
 Were mostly used as
calendars.

16. 3. Calendars:
 Were designed to measure time and
organize society.
 The first calendar used in the western world
was the Julian calendar which was
introduced by Julius Caesar.
 In 1582, Pope Gregory XIII developed the
Gregorian calendar, which replaced the
Julian calendar.

17. Linear Time:
 Is a measurement invented to use in
long range planning.
 Can be plotted on a timeline.
 Always has a beginning and an end.

18. Three examples of linear
time measurement:
1. Personal Time:
 Is time reflected by the life span of an
individual person.
 Includes events such as birth,
graduation, and marriage.
 Is measured in days, months, and years.

19. 2. Historical Time:
 Is time since people began keeping records
of historical events.
 Includes important political, social, and
economic events.
 Is measured in years, decades, centuries.
 Remember: B.C. means “Before Christ”
and A.D. means “Anno Domini” (In the Year
of Our Lord).

20. 3. Geological Time:
 Is time reflected by the age of the Earth.
 Includes periods in the Earth’s
geological development and the
development of life on Earth.
 Is measured in epochs, periods, and
eras.