Draw a well labelled diagram showing the different heat zones of the world.

Give a geographical reason for each of the following:
(i) Lines of longitude are called meridians of longitude.
(ii) Lines of longitude are of same length.
(iii) Diametrically opposite lines of longitude and the Equator are called Great Circles.

Draw a well labelled diagram to show that places on the same longitude have the same time.

Describe the lines of longitude.