Ancient Methods and Tools
What did ancient people burn to measure intervals of time?
incense
candles
What does Earth do during one day?
It completes one full rotation.
How does a simple water clock work?
Water flows from one container into another.
What is a pendulum?
A weight that swings back and forth from a pivot at a regular rate.
What device did ancient people use to measure time with shadows from the Sun?
The sundial
What does Earth complete doing during one year?
On orbit around the Sun.
Why were water clocks better than burning incense?
They don't smell.
Water can be used over and over again.
How many times will the pendulum in most pendulum clocks swing per minute?
60
What were the disadvantages (bad things) about using a sundial?
They don't work at night or when it is cloudy.
How many hours are in 1 day?
24
What happens to the flow of water from a container as the water level gets lower.
It gets slower
Does the mass (wight) of a pendulum affect how many times it swings per minute?
No
How did ancient people measure time using gravity to make something flow?
Water clocks and hour glasses.
How many minutes are in one hour, and how many seconds are in one minute?
60
Why does the flow of water from a container slow down as the water level gets lower?
There is less pressure from the water above.
What happens to a pendulum if it gets longer?
It swings slower.
Why did ancient people want to measure time?
So they would know when to do something or how long they should do it.
Other examples may be acceptable.
Why did ancient people decide on 60 minutes in one hour and 60 seconds in 1 minute?
60 divides into whole numbers by many smaller numbers.
How can you make a water clock measure time accurately as the water level drops.
Various answers
What is the name for a back and forth movement that repeats at a regular speed?
oscillation