Sundials and Their Functions

The video introduces sundials, ancient timekeeping devices used before clocks and watches. It explains their historical significance, development, and standardization of time. A specific sundial example is discussed, highlighting its design and accuracy. Various types of sundials are presented, including portable ones. The video concludes with an invitation to visit the Canada Science and Technology Museum for more information.

Where is the Canada Science and Technology Museum located?

• Montreal, Quebec

• Ottawa, Ontario

• Vancouver, British Columbia

• Toronto, Ontario

How long ago were sundials first used in Egypt?

• 2,000 years ago

• 3,500 years ago

• 4,000 years ago

• 1,000 years ago

What was the purpose of the tall stone obelisks in early sundials?

• To indicate the direction of the wind

• To act as a center stick or gnomon

• To mark the equinoxes

• To serve as a decorative element

When the length of a day was standardized to 12 hours, how were sundial faces divided?

• Into 12 equal parts

• Into 6 equal parts

• Into 10 equal parts

• Into 24 equal parts

Who was the sundial made for that was designed by Otto Klotz?

• A member of parliament, W. Patterson

• A famous scientist

• A school teacher

• A local farmer

What is the accuracy of the sundial made by Pritchard and Andrews?

• 10 minutes

• 1 minute

• 5 minutes

• 15 minutes

What is the purpose of the gnomon in a sundial?

• To cast a shadow

• To reflect sunlight

• To measure temperature

• To indicate wind direction

What is the north celestial pole in relation to a sundial?

• The point directly above the Earth's south pole

• The point directly above the Earth's north pole

• A compass direction

• A star used for navigation

What is a unique feature of the tiny ring dial sundial?

• It has a digital display

• It can be used underwater

• It is made of gold

• It is portable and can be held vertically

How does sunlight interact with the tiny ring dial to indicate time?

• It is magnified by a lens

• It is absorbed by a solar panel

• It reflects off a mirror

• It passes through a tiny hole