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Transcript 
Soil: More than
just a bunch of
dirt
What is soil made of?
 The
basic components of soil are:
 decayed remains of once living organisms
(organic material)
 rock
 water
 air
Layers of soil
 Humus
 Topsoil
 Subsoil
 Bedrock
Humus
 Living
material
 Plants
 Decaying
 Needles
 Moss
 Thin
layer
 Dark color
leaves
Topsoil
 Mostly
minerals
 Plant roots
 Dark color
 Decaying plants
 Decaying animals
Subsoil
 Silt
 Sand
 Clay
 Not
broken down
all the way
Bedrock
 Lowest
 Solid
layer of soil
rock layer
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