Reveal patterns in length of day and night Practice Test

Why is half of the Earth dark and the other half white in this diagram?

Source of diagram: The Victoria State Education and Training department

Antwon researched the lengths of day and night in different parts of the world on the same day. He created a data table to display the number of daylight hours a specific latitude received on the same day (November 8th). What pattern(s) does the data table reveal about the length of day and night?