AK.D1. Concepts of Earth Science (SD1, SD2, SD3, SD4)
 SD1.1. The student demonstrates an understanding of geochemical cycles by observing a model of the rock cycle showing that smaller rocks come from the breaking and weathering of larger rocks and that smaller rocks (e.g., sediments and sands) may combine with plant materials to form soils. (L)
 SD2.1. The student demonstrates an understanding of the forces that shape Earth by describing how wind and water tear down and build up the Earth's surface resulting in new land formations (i.e., deltas, moraines, and canyons).