Sundials
What did sundials need to work?
Sunlight and a shadow from the stick.
How were obelisks used to tell the time?
By looking at the shadow they made.
What were water clocks also called?
Clepsydras
What materials were used to make the sundial disc?
It was made from stone or wood
Which ancient country first used obelisks as timekeeping devices?
Ancient Egypt
What did water clocks measure?
The passing of time using the flow of water.
Why were sundials important for ancient civilizations?
They helped people measure time for farming, religious rituals, and daily activities.
Why are obelisks considered the ancestors of modern sundials?
Because they used the same shadow principle but on a larger scale.
Why were water clocks more useful than sundials?
They worked at night and in cloudy weather when the sun wasn’t visible.