You probably believe that the earth is sherical, but as we look around , certainly appears that the earth is flat. one classmate suggested thats if you call someone on the other side "of tthe world by phone, they can verify thats it is midnight there when it is noon here another student reminds you of picture taken of sherical earth from the moon landing. your tearcher explains the ancient observation that when the sun was directly overhead on one day near the equator, a pole some hundreds of miles away to the north still cast a shadow. what ,then, is the best scientific basis for considering that the earth is sherical? if scientists say it must be correct until they determine otherwise reasoning must be used to arrive at a model that best fits the observations . if it is in a science book it is known to be correct into other observation is agreed upon and published the observation that the earth is flat is the direct in objective while all of the other observations or indirect subjective or based on extrapolated judgment .