Sundials (or Shadow Clocks) are perhaps the oldest scientific instruments. They are thought to have been developed by the ancient civilisations of Babylonia, Egypt, Greece and Rome. They were used by Viking and Medieval navigators and are still in use today.
One of the most common types of sundial is a Horizontal Sundial and a fully working model can be constructed using Stripwood Technology materials and techniques. Sundials are based on the apparent movement of the Sun across the sky. Making a model can lead to an understanding of our Solar System and terms such as Latitude.
Sundials have two basic parts: there is a sloping rod (or edge of a plate) which casts the shadow and plate, or 'dial', on which the shadow falls to indicate the time. The sloping rod is known as a Gnomon. The Gnomon should always point North (in the northern hemisphere) and be set at an angle which is equal to the Latitude of the Sundial's location.
Note: To check your Hour Lines, DT Online Design Tools are available HERE which calculate each hour line for any given Latitude which is input and optionally print-out a Template of the resulting 'Dial Plate'.
It is possible also to make a 'Pop-up' Card Sundial by cutting and folding a design which has been printed on a single sheet of thin card - or even paper!
Safety Point! Take great care with hot glue guns and all hot-melt glues. The melted glue can stick to the skin and cause severe burns.
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