AP Environmental Science

Answer: B - Sedimentary rock covers most of the Earth’s land surface.

Key Takeaway: Sedimentary rocks when sediment that has been broken down through erosion and weathering is compacted and cemented together. Over time, this sedimentary rock is buried and, underground, is subjected to a lot of heat and pressure. Sedimentary rock covers most of the Earth’s surface and if subjected to certain conditions, can change into either igneous or metamorphic rock.