Early Humans
They tracked time with the changing seasons and the sun and moon.
What is early humans?
What clock tracks the time with the movement of the sun?
What is a sundial?
The Earth takes one solar year to travel around our sun. How many days rounded to the nearest one are there in a year?
What is 365 days?
Egyptians used this large stone object as a pointer in many of their giant sundials.
What is an obelisk?
Bone or wood objects early humans made marks in to track the days.
What is a calendar stick?
This amazing clock records time by counting the vibrations of atoms in cesium, a natural radioactive chemical.
What is an atomic clock?
India has had at times as many as thirty different calendars. The festival celebrated around the world that originated from India today is a festival of lights.
What is Diwali?
Some clocks told time using this small swinging object.
What is a pendulum?
Humans learned to collect and store berries and nuts before what came each year?
What is winter?
In 325 BC what type of clock appeared in Egypt that did not require the sun?
What is a water clock?
The Chinese lunar calendar has an animal associated with each year. 2026 is the year of the horse. How many animals are there in the lunar calendar?
What is twelve?
Vibrating at a constant frequency, this mineral was incoprated in clocks in the 1900s to improve accuracy.
What is quartz?
Early farmers worshipped this celestial object.
What is the sun?
Using a system of pulleys and ropes or tightly coiled springs, what clock began appearing around the 1300s?
What is a mechanical clock?
The Roman calendar had tenth months until two more January and February were added. Later Julius Caesar renamed the months Quintilis and Sextilis to what?
What is July and August?
Mechanical clocks invented in the 1300s used these to turn the hands of the clocks.
The first recorded evidence of tracking time by humans is thought to be how old?
What is thirty thousand years?
Using sand and glass these clocks are still used today to measure a range of times from seconds to hours.
What is an hourglass or sandtimer?
This civilisation in the Americas was able to calculate a solar year correctly down to a few seconds difference, as well as create one of the first number systems with an understanding of '0'.
What are the Mayans?
Atomic clocks are so precise that they may only have an error of how much in millions of years?
What is one second?