1. Soil: More than just a bunch of dirt

2. What is soil made of? The basic components of soil are:
decayed remains of once living organisms (organic material)
rock
water
air

3. Layers of soil
Humus
Topsoil
Subsoil
Bedrock

4. Humus Living material Plants Decaying leaves Needles Moss Thin layer
Dark color

5. Topsoil Mostly minerals Plant roots Dark color Decaying plants
Decaying animals

6. Subsoil
Silt
Sand
Clay
Not broken down
all the way

7. Bedrock
Lowest layer of soil
Solid rock layer