3rd Grade - Earth Science Bundle  Each Unit includes: PowerPoint presentation, Interactive Notes, Study Guide, and an assessments with key.   1.	Rocks and Minerals: mass, volume, texture, mineral, rock.  2.	Weathering: weathering by water, by ice, and by wind.  3.	Soil: soil, particle, humus, nutrient, sand, silt, clay, and loam.  4.