Solar System Scale and Size is a two-part activity that explores relative distances and sizes of objects in our Solar System using the 5E Instructional Model. In Activity 1, students are tasked with calculating relative distances to the Sun for the planets, Asteroid Belt and Pluto using information provided in a student handout. Once the calculations are complete, students use this information to produce a relative distance model of the Solar System with string and beads. In Activity 2, students use food items to assign relative sizes to each planet (including dwarf planet, Pluto). Shared by the National Science Teachers Association.