Info 1
The process that occurs when physical forces break rock
into smaller pieces without changing the rock’s chemical
composition is called
mechanical waethering
Chemical weathering is highest in areas that are
very warm and wet
what is the main source of organic matter in soil
Plants
The process called involves physical forces that break rock into smaller pieces.
mechanical weathering
During the process of soil formation,
decompose dead plant and animals, increasing the amount of
organic matter.
microorganisms
Which of the following weathering processes involves the constant freezing and thawing of water?
Frost wedging
Rock features such as the sculpted pinnacles seen in Bryce Canyon National Park are the result of
Differential weathering
In what area will soil formation be greatest?
a flat area in a warm, wet climate
One cause of chemical weathering is the
that dissolves in water and then reacts with many common minerals, forming oxides.
Carbonic acid
On a steep slope, erosion is accelerated because there is not enough moisture to sustain sufficient
plant growth
The inscriptions on marble gravestones become harder and harder to read over time. This is caused by
Chemical weathering
Name one of the major components of soil
Humus, mineral matter, air
Pedalfer soils would most likely be found
Eastern half of the U.S.
weathering happens when different parts of
a rock mass weather at different rates.
Differential
is a dense impenetrable layer found in the
B horizon of a soil profile.
hardpan
When a rock is exposed to chemical weathering, it what?
changes into one or more compounds
What is the largest component of bog soil?
organic matter
Oversteepened slopes often lead to mass movements
because
the angle of their slope is greater than 40 degrees.
The air component in soil provides plants with the
needed for photosynthesis.
carbon dioxide
In a soil profile, the layers contain parent material that is hardly weathered at all.
deepest
What is a factor that affects the rate of weathering in rocks?
mineral composition, climate, amount of exposure
Soil that forms on unconsolidated deposits is called
Transported soil
A mass movement that involves the sudden movement of a block of material is called a
Slide
this soil is made of equal parts of clay, silt,
and sand.
loamy
A stream valley is the most common result of
mass movement