→ Formation Of Soil 12/4/15 → Start Learning / Flashcards Téléchargement MP3

question		réponse
a mixture of sand, silt, soil, clay, rock and humus (plant and animal remains) commencer à apprendre		soil
when forces on Earth breaks rocks apart or wear rock away commencer à apprendre		weathering
the uppermost 5 to 20 cm of soil with a high concentration of organic matter and microorganisms where almost all of the biological activity in soil takes place commencer à apprendre		topsoil
easily broken down by biological activity, especially bacteria in the soil commencer à apprendre		biodegradable
to break down into smaller, more basic parts commencer à apprendre		decompose

Formation of Soil 12/4/15