Spaceship Earth Mystery #2 - Who Set the First Clock

Why do we set our time in 24-hour periods?

• Because the Ancient Egyptians liked the number 12.

• Because the Ancient Romans thought 24 was a good number.

• Because the Ancient Assyrians had 24 celebrations, one for each hour of the day.

• Because of the way the Ancient Mayans set up their calendar.

If they Ancient Egyptians liked the number 12, why are there 24 hours in a day?

• Because the Ancient Egyptians weren't very good at math.

• Because the Ancient Egyptians loved 24 too!

• Because the Ancient Egyptians and Ben Franklin agreed that 24 hours was a good number.

• Because the Ancient Egyptian separated the day and night into two twelve-hour periods.

How did the Ancient Egyptians break up the two twelve-hour periods?

• Into Saturday and Sunday

• Into Day and Night

• Into weeks

• Into Summer and Winter

How many finger sections do you have on each hand, if you are counting with your thumb like an Ancient Egyptian?

• 4

• 8

• 12

• 24

How many hours are there in every day and night?

• 12

• 22

• 24

• 72

What do sundials do?

• Tell the time by using the sun's shadow.

• Tell the time by using clouds.

• Tell the time by using the moon's gravity.

• Tell time by using complex gears and quartz power sources.