Tues. 12/21/10
BLUE Day
Do NOW: RB #97 # 1-5 on answer sheet
Lab due by Wed: #26- Weathering Sugar Cubes
HW due today: place in folder
HW due by Wed: Participation Summary
MIDTERM Review Packet- due by Wed. 1/5, 5 pt
bonus if completed by this Thurs. –MUST BE ON
SCAN-TRON!!
*** Weathering & Soil QUIZ on Wed ***
Part 2: Erosion & Deposition
AIM: Describe the processes that cause erosion
& deposition
when weathered rock
and soil particles
(sediment) are moved
from one place to
another
Grand Canyon
2. What does an erosional system
require?
a. An agent of
erosion
b. Sediment being
moved
c. Driving Force
(Gravity)
Running Water
process by which
sediments drop out
of the water, wind, or
ice carrying it
Into large bodies of
water
When the velocity (speed) of an agent
of erosion decreases or stops.
Velocity
As a stream slows down, deposition
increases
Rate of deposition
Rate of Deposition
Size- The larger the particle, the
greater the rate of deposition
Size of sediment
Rate of Deposition
Shape- The rounder the particle, the
greater the rate of deposition
Roundness of sediment
Rate of Deposition
Density- The more dense, the greater
the rate of deposition (settling rate)
Density of sediment
Wed. 12/22/10
BLUE Day
Do NOW: RB #97 # 6-10 on answer sheet
Lab due by Wed: #26- Weathering Sugar Cubes
HW due today-place in folder:
Participation Summary
MIDTERM Review Packet- due by Wed. 1/5, 5 pt
bonus if completed by this Thurs. –MUST BE ON
SCAN-TRON!!
*** Weathering & Soil QUIZ TODAY ***
Thurs. 12/23/10
BLUE Day
Do NOW: RB #98 # 11-17 on answer sheet
MIDTERM Review Packet- due by Wed. 1/5,
5 pt bonus if completed by today. –MUST BE ON
SCAN-TRON!!
Test Corrections!
Have an awesome break!!! 
9. How does the degree of saturation affect
the rate of deposition?
Start
wed
The more saturated the water is with
per 3
minerals (e.g., salt), the more minerals will be
deposited, or settle out.
Sediments that are similar in size,
shape or density
Sediments that are mixed in size,
shape or density
12. How does a gradual change in speed
of wind or water affect how sediment
is deposited?
When the velocity gradually decreases (a
stream flows from a steep area to a flatter area)
the larger, rounder and more dense sediments
settle out first.
Horizontal layers form
Horizontal Sorting
13. How does a rapid change in speed of
running water affect how sediment is
deposited?
When a mixture of sediments settles rapidly, it
settles in vertical layers.
The largest, roundest and most dense particles
settle on the bottom and the smallest, flattest
and least dense on top.
Vertical Sorting
Mon. 1/3/11
GOLD Day
Do NOW: RB #100 # 18-24 on answer sheet
Extra Help: Tues/Wed
Labs due by Fri: #28: Temp & Chem Weathering
#29: Deposition of Sediments
HW due by Fri : 1. Vocab packet #2
2. Textbook w/s (attached to vocab)
3. Stream w/s (TBA)
4. Study Guide: # 1-24
MIDTERM Review Packet- due by Wed.–MUST BE ON
SCAN-TRON!!
** Gravity & Running Water & Vocab QUIZ on Thurs **
Part 3: Gravity & Running Water
AIM: Describe how gravity and running water
cause erosion & deposition
downhill movement of
sediments caused by gravity
leaning trees
2. How does
gravity deposit
sediment?
running water has great energy of motion
it is the most common agent of erosion
running water loses energy at bottom of
slope  sediments are deposited
water flowing through a channel
a smaller stream that flows into a larger stream
The area of land drained by any one stream
or river
• Solution: dissolved minerals
• Suspension: carried within the stream
• Rolling: bouncing along the bottom (stream
abrasion)
• V- shaped valleys
• Slope
The greater the slope the greater the
velocity
• Volume (discharge)
The greater the volume of water in a stream
the greater the velocity
• Channel Shape
The rounder the stream channel, the
greater the velocity due to less friction
• In the center, just below the surface where
there is less friction
• On the outside of the bend, just below the
surface where there is less friction
Elbow =
Erosion
Dent =
Deposition
• The greater the velocity, the larger the
sediment a river/stream can carry
ESRT
pg. 6!
•Streams deposit SORTED sediment in the
slowest sections
New
channel
deposition
of
sediments
Oxbow
Lake
•A thin, flat region on the sides of a stream
subject to flooding and deposition
Floodplain
Floodplain
Delta - large amount of
sediments deposited at the
mouth of a large river that flows
into a lake or ocean
Mississippi Delta
Gulf of Mexico
Bird’s Foot
river water is
no longer flowing
downhill; water
slows down and
deposits
sediments
•Youthful stream (early stages):
steep slopes, high energy, down
cutting, erosion is dominant
• Mature stream: grows larger,
more tributaries, begins to
meander
• Old age: slow moving, many
meanders, oxbow lakes, wide
valleys, deposition is dominant
17. How do potential and kinetic energy change
from the source of a stream to its final
destination (mouth)?
•At the source, the stream has the maximum potential energy
• As it flows toward the mouth, the P.E. is converted to K.E.
• Kinetic energy is lost to friction. At the mouth, K.E. equals zero
Red River
Part 4: Wind and Waves
AIM: Describe how wind and waves cause
erosion & deposition
1a. What type of sediment can be blown
by wind?
loose sediment the
size of sand or smaller
Deflation – wind blows away loose
sediments lowering the level of the land
Sand Blasting – wind blows sand
against other rocks, forming small pits,
called ‘frosted’
Sand Dunes – a large deposit (mound) of
wind-blown sand
The gentle side faces the direction the
wind is coming from
2a. How do waves cause erosion?
Breaking waves
pound against the
shoreline
2b. What is a longshore current?
waves arrive at
an angle to the
shore
A longshore
current flows
parallel to the
shore
2c. What type of sediment do waves
deposit?
•Rounded, Sorted sediments (it’s water!)
2d. What are some features of wave
deposition?
•Beach
•Narrow portion of the shore formed
from deposited sediments
2d. What are some features of wave
deposition?
•Sandbar
•A pile of sand just above water level
deposited by waves
2d. What are some features of wave
deposition?
•Barrier Island
•Long, narrow island parallel to the
shore
•Built by sand deposited by waves
and wind
•Important feature that protects the
mainland from storms
4/7/1981 Aerial Photo
2008 Google Earth Image
Part 5: Glaciers
AIM: Describe how glaciers cause erosion &
deposition
Snow builds up year after year and
compacts
Form naturally in areas where more snow
falls than melts
Continental Ice Sheets
In high, mountain valleys
Alpine (valley) glaciers
Bottom of glacier turns into ice
Gravity pulls Alpine glaciers downhill
Continental Ice Sheets move from the
North towards the South across continents
snow keeps adding on when it doesn’t
completely melt in the summer
3a. What are some
features of glacial
erosion?
Striations
Parallel scratches
or grooves glaciers
leave on rocks
3a. What are some features of glacial
erosion?
Kettle Lakes
A lake formed
when a large block
of ice buried in
glacial sediments
melts, leaving
behind an oval
depression filled
with water
Horn –a sharp
peak
Cirque – bowlshaped wall of rock
Arete – sharp
ridge separating
two cirques
2b. What shaped valleys do glaciers
carve out?
U- Shaped valleys
ice at the front of a glacier begins to melt,
depositing unsorted sediments called till.
Creates a variety of depositional features
Moraine – ridge
of till left behind by
a retreating glacier
Outwash Plain sediments
deposited by
rivers of glacial
meltwater in front
of a terminal
moraine
Drumlin – ridge of till left behind by a
retreating glacier
Glacial Erratic- large rock fragments
transported by a glacier and deposited in a
new location