Which one of the following statements is CORRECT about the behavior of your zenith (the vertical direction above your head)over a period of 1 year if you were standing on Earth's equator?
A) The angle between your zenith and Earth's spin axis will vary between +23.5° and -23.5° over this period.
B) Your zenith will always be perpendicular to Earth's spin axis.
C) Your zenith will always remain at a fixed angle of 23.5° to Earth's spin axis.
D) Your zenith will always be parallel to Earth's spin axis.

Question

Quizplus · Accepted Answer

If you are standing on Earth's equator, your zenith will always be perpendicular (i.e., at right angles) to Earth's spin axis. This is because the Earth's equator is on a plane perpendicular to the spin axis, and your zenith is defined as the point directly above your head. Therefore, the angle between your zenith and Earth's spin axis will always be 90 degrees (perpendicular), and it will not vary over the course of a year.

Which One of the Following Statements Is CORRECT About the Behavior