Basic Info
How long can it take for one inch of soil to form?
1000 years
Sand has what type of texture?
Rough/gritty
This type of soil is a mix of 3 others.
Loam
How many layers make up a soil profile?
5 layers
The layer that is composed of solid rock.
Bedrock
How is soil formed?
Weathering of rocks
Largest
Smallest
Name the layers of a soil profile from top to bottom.
Humus, Topsoil, Subsoil, Parent Material and Bedrock
When we combine all the layers of soil together in a picture we refer to that as a?
Soil Profile
What are the 4 types of soil we talked about?
Sand, Silt, Clay and Loam
This type of soil retains water longer and drains poorly.
Silt
Which type of soil is best for growing things?
Loam
This layer is also known as the organic layer.
Humus
The Humus layer is made up of what?
Decomposed materials such as leaves, plants, and bugs.
Earthworms do two things to help soil. What are those two things.
Turn plant and animal material into nutrients and dig through to loosen up the soil
This type of soil is the medium soil particle.
Silt
This type of soil is sticky when wet but smooth when dry.
Clay
This soil layer is made up of clay, iron and organic matter.
Subsoil
In which layer of soil are plant roots not found.
Parent Material and Bedrock
Soil consists of? (6 items)
Rocks, sand, clay, dead plants, animal remains and fungi
This type of soil doesn't contain many nutrients but is good for providing drainage.
Sand
A scientist who studies soil is called a?
Pedologist
How thick (depth) is the topsoil layer?
5-10 inches
This is the primary layer where plants and organisms live.
Topsoil