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During the lunar eclipse, the Earth casts a round shadow on the moon is one of the Aristotle provided the following physical and observational arguments supporting the idea of a spherical Earth. Let us prove the argument of Aristotle using two identical round opaque plates or any two identical balls, and a light source such as a flashlight or the flashlight from a cellphone. The flashlight will serve as the Sun, while the plates or balls will serve as the moon and Earth. Procedure: 1. Align the flashlight and the plates or balls horizontally. Like the arrangement of the Sun, Earth, and Moon during the Lunar eclipse. 2. Illuminate, one of the plates or ball with the flashlight and observe the shadow it casts on the plate or ball behind it. Be sure that you will perform this activity in a dark place. Guide Questions: 1. What can say about the shape of the shadow cast on the moon (plate B or ball B) by the Earth (plate A or ball A)? 2. Does the experiment prove the argument of Aristotle?