Where more than one answer is acceptable, the additional correct answers are in blue . Rocks that form from the cooling and solidification of molten magma are called igneous rocks. A soil series consists of soils that have similar horizons in their profile and is the most detailed category in U.S. Soil Taxonomy. A soil survey is the systematic examination, description, classification and mapping of the soils in an area. The wearing away of soils and rocks at the land surface by water, wind, ice, and gravity is called erosion .
Parent material is the unconsolidated, weathered mineral or organic material from which soils form.
The disintegration or decomposition of rocks or minerals under the influence of organisms is called biological weathering . Interstellar dust or interstellar soil is made up of small particles that come from exploding stars and float around the universe. The Important Farmlands System identifies prime farmlands and statewide important farmlands based on specific soil and climatic criteria.