Soil is a mix of
weathered rocks
Humas
layer of rotting plant
and animal matter
Top Soil
Rich in humus
and minerals
Good for
growing crops
Subsoil
Rich in minerals
Little humus
Weathered rock
Brocken into chunks
Benrock
Soil parent rock
The breakdown of materials
of earths crust into smaller
pieces
Physical
When water gets into a crack
and freezes making the crack
bigger then happens again
and again until the rock falls off
Chemical
Acidic rain reacts with rock
Biological
When roots get into rock
and break it apart
The process by which water,
ice, wind or gravity moves
fragments of rock of soil