Transcript Weathering, Erosion & Deposition

Created by:
Mildred
Final Jeopardy
Weathering
Erosion
Deposition
Left Overs
Left Unders
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The kind of
weathering
shown in the
diagram is
known as
Frost action or Ice
wedging
Why does the
powdered
limestone react
with the acid at a
greater rate than
the larger rock?
It has a greater surface area
in contact with the acid
After several minutes of shaking mineral B
has lost mass and become rounded while
mineral A is unaffected. Explain why.
Mineral A is harder (more resistant to
abrasion) than mineral B
Which of the following minerals would be
altered most by contact with acid?
A) KAl3Si3O10(OH)2
B) (Fe,Mg)2SiO4
C) Fe3Al2Si3O12
D) CaCO3
C) CaCO3 (carbonate minerals
react with acid while silicate
minerals do not)
The following minerals were placed in a
container of water and shaken for 30
minutes. At the end of that time which
mineral showed the least evidence of
weathering and WHY?
A) KAl3Si3O10(OH)2
B) (Fe,Mg)2SiO4
C) Fe3Al2Si3O12
D) CaCO3
Fe3Al2Si3O12 because it is the
hardest (most resistant) mineral.
(see page 16 reference tables)
At which
location in
the diagram
is the
stream
velocity
lowest?
Velocity is lowest at location D (the
inside of a curve)
A rock, found in the desert, has a pitted
surface. Which agent of erosion is most
likely responsible for the rocks
appearance?
The rock has been pitted
by sand moved by the
WIND
Explain why the
rocks have
eroded
unevenly.
Differences in hardness (resistance).
The softer rocks have eroded more
than the harder ones.
DAILY
DOUBLE
At which
location (A
through D) is
the water
velocity
greatest and
explain why
Velocity is greatest at B because it
is farthest from the bottom and
sides (less friction)
According to the data, at which location
was the gradient of the stream greatest?
At location C - the water velocity
is greatest.
Which agent of
erosion is
responsible for the
deposition of the
cross section of
sediment seen in
the diagram?
Running Water
Which agent of
erosion is
responsible for
the deposition
of the sediment
seen in the
diagram?
Ice (glaciers)
At which
location would
the smallest
particles
probably be
deposited?
Location D
If the velocity of a stream
decreased from 400 cm/sec to
50 cm/sec which particle(s)
would remain in suspension?
Sand, Silt, and Clay
(must name all to get money)
What kind of
particles would
most likely be
deposited in the
lake beyond the
location of the
clay deposits?
Colloids
In what kind of climate does
chemical weathering proceed at
the fastest rate?
Warm (hot) and Wet
Some rocks such as limestone
are weathered by contact with
acid. This kind of chemical
weathering is known as.......
Carbonation
Name the 4 methods by which
sediments are transported by
running water.
Floatation, Suspension,
Rolling (saltation) and in
Solution.
What is the force that drives all
erosion?
Gravity
Name 3 stream characteristics
that can affect the rate of
erosion.
Slope (gradient), Rate of
discharge, Shape of the
stream channel.
Sharp and angular rock
fragments are found at the base
of a vertical cliff. By what
method of erosion were they
transported there?
Gravity
Scratched and polished rock
was probably eroded by
Glaciers
What term
describes the
granite rocks
depicted in the
diagram?
Erratics
Name 3 factors that can affect
the settling rate of particles in
still water.
Size, Density, and Shape
Name any 5 characteristics of
regions shaped by glacial
erosion and deposition.
1) Parallel grooves in rocks
2) U-shaped valleys
3) Scratched and polished rock
4) Erratics
5) Deep parallel lakes
6) Usorted, unconsolidated sediment
FINAL
JEOPARDY
Forgetaboudit!
?
Raoul drops many
balls into a column of
water all at the same
time. They settle to the
bottom as shown in the
diagram. Explain why
this unexpected result
occurred.
The smallest balls are the most
dense and the largest balls are the
least dense.