Have them adjust the model sun diameter and re- calculate or think of another way of adapting their model until they have a size that will fit. Models should not simply fold back and forth across the area or the sense of great distances will be lost. When their model sun diameter is set, they should complete the rest of the chart. Have each team draw and cut out a model sun of their chosen size from poster board. Have them prepare their model planets.
Teams measure off distances and set up models.
If possible, mark off 10 meter intervals ahead of time to speed up model setup. The visible part of the sun is 1,390,000 kilometers across. Because the class is spread out so far it helps to arrange for assistance from a second adult. If models are set up near streets, emphasize traffic safety and supervise carefully. Have the team stand by Earth and see how hard it is to see the outer planets.