Back to lesson The First Great Lesson 0% Complete 0/0 Steps Prep Planning & Materials Discussion Video Lesson The First Great Lesson Experiments and Activities Force of Attraction Settling Layers According to Density Make Your Own Volcano Nomenclature - Beginning of the Universe Research - Beginning of the Universe Answers Answer Key: The First Great Lesson The First Great Lesson The First Great Lesson Section 3 of 9 In Progress ← Previous Next→ The First Great Lesson