Soil Flashcards
1
Q
Soil composition
A
Mineral particles of sand silt + clay
Water- binds the soil together + dissolves minerals + nutrients into the soil
Air - found in the pores between the soil particles
Organic matter- worms + plants
2
Q
How soil is formed
A
rocks are weathered + eroded to form mineral particles
Organisms change plant litter into hummus
Water mixes with the mineral particles + hummus
3
Q
topsoil
A
Topsoil, most fertile, darkest
4
Q
Subsoil
A
Under the topsoil less hummus, some rocks
5
Q
A
