Sundials and Shadows

At what time does a vertical stick cast the shortest shadow? Choose from:

• local noon

• 12:00 noon GMT

• 10:00 am GMT

Which part of a sundial casts a shadow on to a graduated scale?

• A dial

• B gnomon

• C motto

• D nodus

In the UK at local noon, the Sun

• A has its smallest altitude

• B is due south

• C is directly overhead

• D has an azimuth of 90°

In which of the following directions should the gnomon of a sundial in the northern hemisphere point? Choose from:

• to magnetic north

• to Polaris

• to the North Celestial Pole

In which of the following directions should the gnomon of a sundial in the southern hemisphere point? Choose from:

• to magnetic south

• to the star alpha Crux

• to the South Celestial Pole

Which of the following is correct?

• When using a sundial in summer, add 1 hour to the reading to give the approximate British Summer Time

• When using a sundial in summer, subtract 1 hour from the reading to give approximate British Summer Time