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In which layer of soil is most humus (organic material) found?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
Oxidation is a type of chemical weathering caused by oxygen. What is another name for oxidation?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
If you made a drawing of the soil horizons (layers) which layer would be least weathered and which would be the most weathered?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
What is the name for sediment that is eroded down a slope due to gravity?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
What deposition environment is created when river water slows down and drops its load?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
Acid precipitation, animals, plants, and water are all agents of what?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
What part of the soil is created from decayed organisms and helps add nutrients to the soil?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
Which is the best definition of soil?
Chemical weathering
weather rocks and minerals mixed with water and air
rust
delta
mass movement
humus
Least = bedrock; most = topsoil
topsoil (top layer)
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