Passage of Time

Egyptains used obelisk

3000 BCE

an obelisk is a vertical structure with four sides and is placed in the sun to cast shadows.

Greeks & Egyptians Water Clock

325 BCE

also called a clepsydra

Babylonia Sundial

300 BCE

Ancient China burning ropes

520

After candles were invented they started to make notches in candles to track the passage of time.

The Hourglass

1001

used in Europe by the 11th century first timekeeper invented that did not rely on the sun

Mechanical Clock

1300

used physics principals to mark increments of time over a 12-hour period.

Analog Clock

1401

round clock face, short hour hand and long minute hand

first watches

1401

time pieces that people could wear. measured time through a system of coiled springs.

European inventors create the pendulum

1600

the pendulum increased a clocks accuracy and preciseness

Quartz Crystal

1950

Quartz Crystal was first placed in watches instead of coils and springs usually show the time digitally.