Building a Tin Clock
Is it a clock or a timer?
Goal:
Goal:
The Greeks and Romans used a tin clock.
Tin Clock
Materials:
4 tin cans (soup cans)NailLadderWater
1. Using a nail, punch a small hole in each tin can except the last one.
2. Place the tin cans on a three-rung ladder.
3. Fill the top can with water. Position the other cans on the rungs below so the water flowing out of the hole fills the can below.
4. Time is up when the last can is full. You can adjust the holes or the water level for more or less time. How long do you think it will take?