What term describes unweathered hard rock beneath soil layers?

Which term refers to the long-term average weather conditions?

What is the term for the removal of soluble constituents from soils by percolating water?

What is the term for matter found in or produced by living animals and plants?

What is the process of removing soil from the surface called?

Which term describes the extent of voids or openings in the soil that exist between soil particles?

What is the term for the mineral and organic surface of the earth capable of supporting upland plants?

What is the atmospheric action on rock surfaces that produces decomposition, disintegration, or alteration of rocks?

What is the term for a small, mineral, soil particle ranging in diameter from 0.002-0.5mm?