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Soil
Is it Dirt or Soil???
1
Vocab
•
•
•
•
Dirt
Soil
Residual Soil
Transported soil
2
How does soil form?
• Rocks  smaller particles  tiny
particles(Dirt)  Weathering and organic
remains make Soil.
• Dirt is tiny particles of rock that has been
weathered.
• Soil is dirt with
organics in it.
3
Soil Info
• The longer the rocks are exposed the
more soil is made...
• It takes hundreds of years to make
fertile soil.
• Rock is broken down and made into
soil, sometimes it does transport into a
new area and make new soil there.
(River delta)
4
Residual or Transported
• Residual soils have formed in place
and not been moved far from where it
has been broken down and weathered.
• Transported has been moved from one
area to another.
5
Protecting our soil
• In order to protect our soil we need to
understand how it is made.
• More plants means more soil. The
water will carry away the soil.
• Save the trees!
6
WHY?
Not?
7
Soil or Dirt
•
•
•
•
Dirt
Lighter in color
Lacking minerals
Small un-weather
rocks
Fresh or recent
dead things in it.
•
•
•
•
Soil
Dark colored
Rich in minerals
No rocks
Dead and decaying
things in it.
Soil
Dirt
8
Questions
•
How is soil created from rock?
A. Physical Weathering without chemical
weathering
B. Chemical weathering without physical
weathering
C. Erosion without weathering
D. Weathering without erosion
– D
WHY???
9
Question
•
The composition of soil that has
formed in place is mostly by the local
A.
B.
C.
D.
Agent of erosion
Age of the bedrock
Slope of the land
Bedrock composition
– D
WHY?
10