This resource is great for a an introductory or extension assignment, as well as a sub plan assignment, no outside sources are needed. The worksheet utilizes informative text and illustrations to provide a foundation of knowledge over the following standard: SC.8.E.5.3 Distinguish the hierarchical relationships between planets and other astronomical bodies relative to solar system, galaxy, and universe, including distance, size, and composition. A 10 question assessment is on page 2 of the works