How are the other planets of our solar system different from Earth? This Concept Comparison Frame helps students contrast the Inner and Outer Planets, with the terrestrial rocky dwarfs of Mercury, Venus, Earth and Mars on the one side, and jovian gas giants of Jupiter, Saturn, Uranus, and Neptune on the other. The Concept Comparison Routine is used help compare and contrast key concepts. Specifically, students use like and unlike characteristics and categories shared and not shared by two or mo