Sundials

A student puts a stick vertically in the ground.

1. Describe how the shadow produced by the stick will change during a day in mid-summer from sunrise to sunset.

2. How will the shadow be different during a day in mid-winter?

3. What should the student do to the stick so that the length of the shadow is about the same during a day?

4. What is the thing which makes the shadow on a sundial called?

5. What does "local solar time" mean?

6. The difference between standard time (GMT) and local solar time depends on what day of the year it is. What else does it depend on?

7. What is an equatorial sundial? Why are they so simple to make?

8. What is an armillary sphere?

9. Make either an equatorial sundial or an armillary sundial out of cardboard.