This Earth Systems Learning Resource, which is a 22-page module, is divided into two lessons, namely: Lesson 1 – Characteristics of the Earth Learners will describe the characteristics of Earth that are necessary to support life. Lesson 2 – The Four Subsystems of the Earth Learners will explain that the Earth consists of four subsystems, across whose boundaries matter and energy flow . It includes pre-test and post-test, varied activities for each lesson, content reading, performance task, activity rubric, additional activities, and answer key.