Understanding Sundials and Their Functions

Matthew from the Chattanooga Public Library explains how to make a sundial using common household items. He discusses the history of sundials, their evolution, and how they work based on the Earth's orbit and the Sun's position. The video provides a step-by-step guide to creating and calibrating a sundial, along with creative ideas for making unique sundials using various materials.

What is the primary function of a sundial?

• To navigate directions

• To predict weather

• To tell time using the sun's position

• To measure temperature

Which ancient civilization was the first to use sundials?

• Greeks

• Egyptians

• Chinese

• Romans

What shape is Earth's orbit around the Sun?

• Elliptical

• Triangular

• Circular

• Rectangular

During which season is Earth closest to the Sun?

• Winter

• Spring

• Summer

• Fall

What is the purpose of the gnomon in a sundial?

• To measure the sundial's diameter

• To decorate the sundial

• To cast a shadow for time-telling

• To hold the sundial in place

What is the first step in constructing a sundial?

• Finding the center of the plate

• Calibrating the sundial

• Marking the numbers

• Attaching the gnomon

Which tool is used to ensure the sundial's numbers are aligned?

• Protractor

• Compass

• Ruler

• Level

How can you find the correct north direction for the sundial?

• Using a watch or phone

• Using a map

• Using a thermometer

• Using a compass

What should you do if the sundial's shadow does not match the current time?

• Change the gnomon

• Move the sundial to a different location

• Add more numbers to the sundial

• Rotate the sundial until the shadow aligns

What is a creative way to make sundial numbers?

• Using rocks

• Using stickers

• Using paint

• Using chalk