Question

A day on Earth is about 24 hours.

What does 24 hours represent?
O A. the time it takes the Moon to orbit Earth once
B. the time it takes Earth to spin once on its axis
O c. the time it takes the Sun to travel once around Earth
D. the time it takes Earth to travel once around the Sun

Answer 1

Answer: C

The Earth and sun are part of the solar system, with the sun at its centre. An Earth day is 24 hours because the Earth spins on its axis once every 24 hours. At any one time half of the Earth's sphere is in sunlight (day) while the other half is in darkness (night).