Time Keeping Devices

Watch the slideshow below. Early time measuring devices

-Look through the slide show.

The sundial Make sundial.	Make a Sand Timer Make a sandtimer for a set amount of time. Can we use it to measure different amounts of time? Minutes and hours? Seconds?
Water clock- Method 1. Plastic cup, and plastic bottle to sit in it. Lots of ways to do this- get ideas… How could we use a water clock to set an alarm?	Candle Clock  Wait, WHAT? How could we set time without drawing up a candle each time?
What other ideas do you have about how time could be measured accurately and precisely?	Time reading https://nrich.maths.org/6070