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DO NOW
Weathering and Erosion
Hill
Science 6
Earth Processes
DO NOW
• 1. Weathering is….
• 2. Principle of
Uniformity
• 3. Lithosphere
• A. the solid part of the
Earth – crust and upper
mantle
• B. breaking down of the
lithosphere by the
action of wind, water,
ice, plants, animals, and
chemical changes.
• C. processes that
changed the world in
the past are still acting
on the Earth now.
DO NOW
• 1. Weathering is….
–B
• 2. Principle of
Uniformity
–C
• 3. Lithosphere
–A
• A. the solid part of the
Earth – crust and upper
mantle
• B. breaking down of the
lithosphere by the
action of wind, water,
ice, plants, animals, and
chemical changes.
• C. processes that
changed the world in
the past are still acting
on the Earth now.
DO NOW
• 1. Erosion
• 2. Two types of
weathering
• 3. Mechanical
weathering
• 4. Chemical weathering
• 5. deposition
• A. Mechanical and
chemical
• B. laying weathered
material down in a new
location
• C. carrying away or
transporting weathered
material
• D. breaking down rock
into smaller pieces
• E. altering the mineral
composition (chemical
makeup) of the rock
DO NOW
• 1. Erosion
–C
• 2. Two types of
weathering
–A
• 3. Mechanical
weathering
–D
• 4. Chemical weathering
–E
• 5. deposition
–B
• A. Mechanical and
chemical
• B. laying weathered
material down in a new
location
• C. carrying away or
transporting weathered
material
• D. breaking down rock
into smaller pieces
• E. altering the mineral
composition (chemical
makeup) of the rock
DO NOW
•
•
•
•
•
•
1. exfoliation
2. ice wedging
3. root pry
4. abrasion
5. gravity
6. frost heaving
• A. the peeling of the outer
layers of rock due to
pressure or temperature
changes
• B. growth of roots
expanding a crack in a rock
• C. rubbing and wearing
away material by wind or
water
• D. landslides
• E. water freezing in a crack
in a rock expanding and
widening the crack
• F. water freezing under a
paved surface pushing the
surface up
DO NOW
• 1. exfoliation
– A
• 2. ice wedging
– E
• 3. root pry
– B
• 4. abrasion
– C
• 5. gravity
– D
• 6. frost heaving
– F
• A. the peeling of the
outer layers of rock due
to pressure or
temperature changes
• B. growth of roots
expanding a crack in a
rock
• C. rubbing and wearing
away material by wind or
water
• D. landslides
• E. water freezing in a
crack in a rock expanding
and widening the crack
DO NOW
•
•
•
•
1. oxidation
2. carbonation
3. humic acids
4. what affects rate of
weathering
• A. CO2 combines with
rain creating an acid
that changes the
chemical composition
of the rock.
• B. oxygen combining
with another substance
– ex. Rust
• C. type and condition of
the rock, pollution,
climate
• D. plants produce acids
that break down rock.
DO NOW
• 1. oxidation
–B
• 2. carbonation
–A
• 3. humic acids
–D
• 4. what affects rate of
weathering
–C
• A. CO2 combines with
rain creating an acid
that changes the
chemical composition
of the rock.
• B. oxygen combining
with another substance
– ex. Rust
• C. type and condition of
the rock, pollution,
climate
• D. plants produce acids
that break down rock.
DO NOW
• 1. What type of
weathering is shown in
the photos to the right?
Lichens on the rocks
DO NOW
• 1. What type of
weathering is shown in
the photos to the right?
– Chemical weathering –
specifically humic acids
DO NOW
• 1. Differential
weathering
• 2. Desert climate
• 3. Tropical climate
• 4. Size of rock
• 5. Elevation
• 6. Type of rock
• 7. Calcium carbonate
• 8. Carbon dioxide
• A. rock weathers more slowly due
to lack of water
• B. smaller pieces of rock weather
more quickly than larger – WHY?
• C. hardness, chemical
composition, and condition of
rock affect weathering – WHY?
• D. CO2
• E. softer rock wears away more
quickly leaving harder rock
behind
• F. rock wears more quickly due to
ample moisture
• G. rock wears more quickly on
mountain top because subject to
more wind, rain, and ice – WHY?
• H. CaCO3
DO NOW
• 1. Differential
weathering - E
• 2. Desert climate- A
• 3. Tropical climate - F
• 4. Size of rock- B
• 5. Elevation - G
• 6. Type of rock- C
• 7. Calcium carbonate - H
• 8. Carbon dioxide-D
• A. rock weathers more slowly die
to lack of water
• B. smaller pieces of rock weather
more quickly than larger – WHY?
• C. hardness, chemical
composition, and condition of
rock affect weathering – WHY?
• D. CO2
• E. softer rock wears away more
quickly leaving harder rock
behind
• F. rock wears more quickly due to
ample moisture
• G. rock wears more quickly on
mountain top because subject to
more wind, rain, and ice – WHY?
• H. CaCO3
Question
• Think about a
landslide.
• What types of
weathering are
involved in a
landslide?
• Does anything else
we have discussed
happen during a
landslide?