time how do we measure time? when was 3,000,000 years ago? what is a timeline?
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Time
Units of Measurement
UNIT SIZE
Second
Minute 60 seconds
Hour 60 minutes
Day 24 hours
Week 7 days
Fortnight 14 days, 2 weeks
Month Between 28 and 31 days
Quarter 3 months
UNIT SIZE
Year 12 months
Olympiad 4 years
Lustrum 5 years
Decade 10 years
Indict 15 years
Generation 25 years
Century 100 years
Millennium 1000 years
Epoch, Period, Era, Eon
TimeGeological Time
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Tertiary
Cultural Time
Pre-history
Old Stone Age
New Stone Age
Ancient
Classical
Middle Ages
Modern
Industrial
Time
Paleolithic
Mesolithic
Neolithic
Copper
Bronze
Iron
Steel
Computer
2,000,000 years ago
10,000 years ago
8,000 years ago
7,000 years ago
5,500 years ago
3,200 years ago
200 years ago
60 years ago
Technological Time
TimeCalendar Date
Gregorian January 1, 2000
Babylonian Year 2749
Buddhist Year 2544
Chinese Cycle 78, year 16 (Ji-Mao), month 11 (Wu-Yin), day 25 (Wu-Wu)
Egyptian Year 6236
Ethiopian 23 Takhsas 1993
French Décade II, Duodi de Nivôse de l'Année 208 de la Révolution
Greek 22 Kiyahk 1716
Hebrew 23 Teveth 5760
Islamic 24 Ramadan 1420
Julian 19 December 1999
Mayan Long count = 12.19.6.15.0; tzolkin = 9 Ahau; haab = 8 Kankin
Persian 11 Dey 1378
Time
Why????Calendar Dating point
Hebrew Creation of world
Islamic Year of the hijira
French Date of French Revolution
North Korea Birth of Kim Il-Sung
Buddhist Birth of Sidhartha
Western culture ??????????
Time
Dionysius Exiguus “Dennis the Little (Humble)” 470-544•Future dates on which Easter would fall
•"the consulship of Probus Junior [Flavius Probus]“
•"since the incarnation [conception] of our Lord Jesus Christ“
•25 March 1 AD
•'Anno Domini Nostri Iesu Christi' ('In the Year of Our Lord Jesus Christ')
TimeAnno Domini
“In the Year of our Lord” A. D.
Before Christ B. C.
Before the Common Era B. C. E.
The Common Era C. E.
B. C. = B. C. E. A. D. = C. E.
Time
Timeline•A representation or exhibit
•key events
•within a particular historical period,
•often consisting of illustrative visual material
•accompanied by written commentary,
•arranged chronologically.
Time10,000 BC Neolithic Revolution
3100 BC Upper and Lower Egypt United
2670 BC First Dynasty of Ur
2500 BC Mohenjo-Daro
1500 BC Shang Dynasty
2000 BC Minoans and Myceneans
753 BC Founding of Rome
476 AD Fall of the Roman Empire
1066 AD Norman Invasion of England
1215 AD Signing of the Magna Carta
11,000 BC
1300 AD
1000 AD
500 AD
0
1000 BC
5000 BC
TimeRule for aligning dates to the correct century
Add 1 to the 100’s number
160
+1
2
2nd century
280
+1
3
3rd century
2007
+1
21
21 century
1492
+1
15
15th century
Time
0100 100200 200300 300
BC/BCE AD
3rd century BC
Which years BC?
1st2nd3rd
3rd century BC = Years 201 - 300 BC
TimeRule for aligning centuries with
the correct date
Subtract 1 from the 100’s and add the years 01 through 00
TimeThe Roman Empire fell in the fifth century AD.
The Magna Carta was signed in the thirteenth century AD.
501
-1
4
401 to 500 years
1301
-1
12
1201 to 1300 years