Clocksby: Julio Lopez

11BEBD

Sundial 5000-3500 BC

Merkhet 600 BC

Greek Water Clock 400 BC

Candle clocks 1940

Hourglass 1300s

Mechanical Clocks 1300s

Pendulum 1656

Atomic clock (FOCS) 1949

Clock 1990s

Watches 1990s

Sorces

• http://www.time-for-time.com/timeline.htm• http://dsc.discovery.com/tv-shows/curiosity/t

opics/10-methods-measuring-time.htm• http://www.clockparts.com/clock-parts/pendu

lum-clock-movements/