[header] How to prove the earth is round [title] Stick 2 toothpicks into the side of an orange. [step] Place the toothpicks about 1 inch (2.5 cm) away from each other. In this experiment, the orange will represent the earth, and the toothpicks will represent objects located in 2 different countries on earth. 
[title] Turn off all the lights and shine a flashlight on the toothpicks. [step] The flashlight will represent the sun in this experiment.