The rotation of earth on its axis creates seasons when it orbits the sun, and daytime and nighttime is caused by the rotation of earth around the sun. When earth rotates around the sun during certain times of the day the earth is facing the sun and so it is day but later in the day the earth spins and the surface is turned away from the sun so it is day.
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Meld into one nation diverse groups who are peaceful within her borders and have a broader loyalty to the country than the group they belong to. In Canada, (where I live) I like to think that the hatred shown between Muslims and Christians, Hindus and both, Jews and Arabs, is an imported emotion. It's not true of course. We're just much quieter about it.