Weathering And Erosion
Weathering
• Weathering
• The process that
breaks down rock and
other substances on
Earth’s Surface.
•
Weathering. clip.asf
Two Types of Weathering
• Mechanical
Weathering
• Examples:
• A type of weathering in
which rocks are
physically broken into
smaller pieces. A physical
change includes change
in size and shape.
• Freezing and thawing,
animal actions, abrasion.
•
What is mechanical weather video clip.
Release of Pressure
Abrasion
Freezing and Thawing.
• Chemical
Weathering
• Chemical change
caused by a chemical
reaction. One
substance changes
into another.
• Example:
• Iron + Water +
oxygen = Rust
Chemical Weathering Clip
Chemical_Weathering.video
Water
• Water weathers rock by dissolving it.
Oxygen
• Water + Oxygen
+Iron = RUST
• When water and
oxygen mix with
Iron it creates
rust. This is
called oxidation.
• Rust video
Carbon Dioxide
• Carbon dioxide
dissolves in rain
water and produces
Carbonic acid.
• This
Carbonic
acid easily
weathers
marble and
Limestone.
•
Cave_formation
video clip
Living Organisms
• Some plants
and animals
can produce
weak acids
that
chemically
weather the
rock.
Acid Rain
• Pictures of weathering
• When pollution
from the air
contaminates
the rain, it
causes rapid
chemical
weathering.
Acid rain video clip
Erosion
• Erosion
• The movement of
rock and particles by
wind, water, ice or
gravity.
•
•
What_Is_Erosion video clip
Erosion video clip
• Difference
between
weathering and
erosion
• Weathering
breaks earth
down and
erosion moves
the broken
pieces around.
1 min video segment on
weathering and erosion
• Sediment
• Is the material moved by
erosion .
• Deposition
• Occurs where the agents
of erosion lay down the
sediment. (drop it off)
• Gravity
• The force that moves rock
and other sediment
downhill. Gravity causes
mass movement of
sediment.
• Weathering, Erosion, and Deposition act together in
a cycle that wears down and builds up Earth’s
surface.
Erosion
Weathering
Deposition
mass movement animation
Weathering breaks it.
Erosion moves it.
Deposition drops it.
What is it? Sediment!
Please sing aloud to the tune of Row Row Row
Your Boat
Ero ro ro sion
Moves sediment down the
stream
Gravity, wind, water, and ice
Deposition is what is seen
Warm-up #1
1. What is the difference between
weather and weathering?
2. List the five types of Mechanical
weathering.
3. Describe two of the five types of
mechanical weathering.
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Warm-up #2
When Carbon Dioxide mixes with water what
does it form?
It forms carbonic acid which weathers limestone
and marble
What type of weathering breaks down rock
through chemical changes?
Chemical weathering
What causes a bike to rust? What does this
have to do with the weathering of rock?
When the metal mixes with water and oxygen it
changes to rust. The metal in rocks can rust
causing the rock to break down.
Warm-Up # 3
1. What is the difference between
chemical and mechanical
weathering?
2. What type of weathering is freezing
and thawing?
3. What are 3 factors that can effect the
rate of weathering?
4. What did you learn from the Chalk it
up to Weathering lab?
Warm up #4
1. What is the difference between
weathering, erosion and deposition
2. Most chemical weathering is caused by
what?
3. What factors effect the rate of
weathering?
4. What is the difference between
Mechanical and Chemical weathering?
Warm-up # 5
1. What are the forces that cause
erosion?
2. What is the dominant process that
causes erosion?
3. The steeper the slope of the mountain
the __________ erosion occurs.
4. What weathers limestone and marble?
5. What causes metal to oxidize?
6. What is sediment?
Warm-up # 6
• What is a contour interval?
• The space between contour lines.
• When Carbon Dioxide mixes with water what
does it form?
• Carbonic Acid and it weathers limestone and
marble.
• What is mass movement of rock? What causes
it?
• When large amounts of rock fall or move due to
the force of gravity.
• What are small, solid particles of rock or
organisms called?
• Sediment
Weathering and Erosion
Types of Chemical Weathering
Effects of Weathering and Erosion
Agents of Weathering and Erosion
Types of Mechanical Weathering