![]() ![]() Can you find an orientation in which neither popsicle stick casts a shadow? Explore how the shadows of the two popsicle sticks compare when you tilt the plate to different angles relative to the light source. Step 3 – Have one team member hold the plate vertically in front of the lightbulb or flashlight, while the other team members observe whether there are any shadows cast by the popsicle sticks. You can use tape to secure your popsicle sticks to the plate so that they stay pointed straight out. Step 2 – Make a small hole on each mark and push a popsicle stick into each hole, so that the popsicle sticks are pointing straight out of the plate (that is, perpendicular to the plate). Step 1 – Mark two places directly across from each other on the paper plate, near to the edge, but not too close. ![]() Group Activity How Shadow Comparisons Prove Earth is Roundīreak up into teams of two or three to demonstrate how the length of shadows depends on the curvature of the Earth.
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