Answer: Since the Earth orbits the sun, when it rotates, one side of the Earth has light shining on it and the other doesn't. A day is one rotation of the Earth and it constantly rotates.
Step-by-step explanation:
I hope that was explanation enough!
Answer:
The sun stays in its position at the center of our solar system. It doesn't rise and set. But it appears to rise and set because of the Earth's rotation on its axis. It makes one complete turn every 24 hours.
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