Does the Sun "Rise" and "Set"?
Exploring the Earth's Daily Cycle
animation shows how sunlight changes as the Earth rotates on its axis.
Each of the 4 frames is one hour later. Look closely at the lines separating
daylight and darkness. Then answer the questions below.
of Living Earth
* The time
is shown as "GMT," or Greenwich Mean Time. This is also known
as "UT," or Universal Time. It is the same moment everywhere
on Earth when times are given as UT or GMT.