The history of timekeeping devices

Sundials are the simplest timekeeping devices.

• True

• False

Subdials used from 3550 BCE

• True

• False

They consisted of a flat disc made from wood and stone.

• True

• False

The shadow cast by the stick in the light of the sun could tell observers what part of the day it was.

• True

• False

Obelisks is like Sundials

• True

• False

The practice of Obelisks dates back to Ancient Greece

• True

• False

Clepsydras is another name of water clocks

• True

• False

Water clocks have been in existence since at least 1500 BCE.

• True

• False

They use the flow of water to measure the passing of speed.

• True

• False

Water clocks were used by Egyptians and Babylonians.

• True

• False