5th Grade Exploring Science book

1. Water Clock
•Objectives
1. To make learners understand
functioning of water clock
Water Clock
Grade 5– Spring 2020
The City School
Raffia
Lecture –Water Clock
Jun-10-20

2. The Water Clock or
Clepsydra

3. What are
they?
The waterclocks or clepsydras
are a type of mechanism for
measuring time by the regulated
flow of liquid to or from a
graduated container.

4. Water Clock

5. How were
they?
• The first water clocks consisted
of a ceramic vessel containing
water to a certain level, with a
hole at the base of an adequate
size to ensure the liquid outlet at
a given speed and, therefore, in a
predetermined time.

6. How did they
work?
• The container available within
several brands so that the water
level indicating the different
periods, day and night.

8. homework
• What are candle clocks and how they
measured time?