(a) (i) With the aid of a diagram, identify the main lines of latitudes.
(ii) Calculate the distance between Addis Ababa in Ethiopia (latitude 10º N) and
Maseru in Lesotho (latitude 30º S).
(b) (i) Define revolution of the earth.
(ii) Describe how revolution of the earth affects the length of day and night in
the Northern Hemisphere.