The Solar System is very complicated. A classic science project is to create a representation of the Solar System, but it is nearly impossible to create a fully accurate representation. According to this infographic, the sun would be the size of a large bouncy ball, the largest planet, Saturn, would be the size of a marble, and the rest of the planets would be around the size of a grain of sand. On top of that, planets are varying distances apart, and travel at drastically different speeds.
This infographic gives a great, accurate, demonstration on the speed, size, and distance of each planet. There are three options that can be flipped through, that show how different the planets are. Challenge your students to discover the reasons for these differences. With science as advanced as it has become, challenge your students to use research methods to find out why some planets travel at different speeds, and what made different planets different sizes.