Why is each day on Earth 24 hours long?

Question

A.
It takes Earth 24 hours to make a complete rotation on its axis.

B.
It takes the Sun 24 hours to make a complete rotation on its axis.

C.
It takes Earth 24 hours to make a complete revolution around the Sun.

D.
It takes the Sun 24 hours to make a complete revolution around Earth.

Answer 1

A.
It takes Earth 24 hours to make a complete rotation on its axis.