Zip file of the complete Unit III Astronomy "The Earth/Moon System." Includes an assessment folder with answer keys; student worksheets, activities and reviews in both Word and PDF format. Assessments in this unit have been converted and can now (also) be given online and auto-graded through Easel. Graphics were added in Easel with each assessment to help with student understanding. Files also include three comprehensive PowerPoint lessons with up-to-date information and instructor slide sorter