What causes day and night?
Make sure you give a full, detailed answer, not just one sentence.

The earth's rotation, earth is rotating, so one side of earth will be hit by the sun, and the other wont be hit, making it dark, but since earth rotates, it causes it to turn, making one side have daylight, and the other, darkness, which the light you see is from the sun's reflection on the moon

Hope this helps

the increase of protons   hope this