2. 1.1 Using Timelines
O Historians: People who study events that
occurred in the past.
O Timeline: A line that s marked off with a
series of events and dates.
O Chronology: A list of events in the order in
which they occurred.
O A timeline is flexible it can cover a day, a
year, a decade, a century, a millennium.
3. 1.1 Using Timelines
O Period: Is length of time singled out
because of a specific event or
development that happened during that
time.
4. 1.1 Organizing Time
O The past is divided into two parts:
prehistory and history.
O Prehistory: is the time before humans
invented writing.
O History: is the time when humans invented
writing.
O BC: Before Christ
AD: anno Domint
(before)
(now)
5. 1.1 Organizing Time
O BCE: Before Common Era
CE:
Common era
O Early calendars are based on religion.
Jewish calendar count the years since the
creation of the world according to Jewish
tradition.
Islamic calendar is dated from the year
Prophet Muhammad moved to the city
Medina.
6. 1.1 Organizing Time
Gregorian calendar has 365—366 day year.
It is based o the movement of the earth
towards the sun.
The Jewish year is based on both sun and
moon, varies from 353---285 days to adjust
to the solar year.
The Islamic calendar is based on the cycles
of the moon and lasts about 354 days.
