Cycles Learn360 The Water Cycle (Grades K-12) The Sun’s Role in the Water Cycle (Grades 3-5) Water Courses The Rock Cycle (Grades 6-8) Stars: From Birth to Death Part 1 (Grades 6-12) Stars: From Birth to Death Part 2 (Grades 6-12) The Sun (Grades 3-5) Geocycles (Grades 6-12) Plants: An Overview (Grades 6-12)