What are the different types of
weathering and how do they affect
the earth’s surface?
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constructive
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crust
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erosion
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earthquake
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divergent
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destructive
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mantle
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volcano
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Weathering
What are the different types of weathering and
how do they affect the earth’s surface?
 Weathering is a general term used to describe
processes that break down rocks at or near the
surface of the earth.
Weathering
Biological
Physical
Chemical
Physical Weathering
 Water
 Seeps
inside crack and
pores of rock and freezes
and wedges rocks apart
 Rivers tumble rocks
making them smooth
 Examples
 Potholes,
sidewalk cracks,
smooth river rocks.
Physical Weathering
 Air:

Changes in temperature
from hot to cold, making
rocks expand and
contract, weakens and
cracks them.
 Examples:

Cracks on surfaces of
rocks.
 Wind

Blows sand and small
rocks against large rocks,
chipping them away and
smoothing them (like
sandpaper)
 Examples:

Smooth rocks in the
deserts
What are the different types of weathering and
how do they affect the earth’s surface?
Chemical Weathering
 Water
 Enters cracks and pores
or rock, the chemicals
in the water react with
minerals in rock and
dissolve or change
them.
 Examples:
 Caves, statues, and
buildings dissolving
Chemical Weathering
 Air
 Air contains oxygen which
interacts with minerals such
as iron, aluminum, silicon and
copper
 Examples:
 Iron rusting
 Copper turning green
Biological Weathering
Plants
Animals
People
-tree roots that grow in
cracks of rocks
-burrowing animals dig
and scrape on rocks
-excavating, digging,
mining, construction
Ex.
Ex.
- Lichen grows on rocks
and makes an acid that
dissolves them
Ex.
Weeds in sidewalks, tree
roots cracking side walks
Animal homes or burrows Rock steps worn down
around rocks
from people walking,
mines
With a Partner…
 Do the mini quiz
 You have about 5 minutes to complete this task.
Check!
Cave formation
After a cold winter, more cracks appear in the sidewalk
Scratches on a rock that appear to be from raccoon
The Statue of Liberty was once bronze, but now green.
Shiny rocks made in a rock tumbler
Tree roots that have cracked a sidewalk
What is erosion, and what are the
three main agents of erosion?
WARM UP….DECIDE WHAT EACH FORCE IS,
CONSTRUCTIVE OR DESTRUCTIVE.
Constructive
Earthquakes
Volcanic Eruptions
Weathering
Erosion
Deposition
Floods
Destructive
Let’s take a trip to the GRAND CANYON!
Gravity
Wind
Erosion
Water
Ice
Water Erosion
 Water is the most powerful




agent of erosion.
Rain water picks up soil and
sand as it runs off.
Rivers carry away rocks and
soil.
Over many years, rivers move
enough materials to create
valleys and canyons.
Along the coast, the waves of
the oceans move sand and
rocks.
Wind Erosion
 Wind erosion happens mostly
along the ground surface.
 Wind carries off soil and small
rocks.
Wrap it up.
Elbow partners….
Is erosion a destructive or constructive force? Explain
your thinking.
On Your Own….
Put your notes in the binder.
2. Complete the vocabulary activity (turn it in number
order).
3. Read a science book from the front.
1.
Constructive
Earthquakes
Volcanic Eruptions
Weathering
Erosion
Deposition
Floods
Destructive
What is erosion, and what are
the four main agents of erosion?
MATERIALS….
BINDER
NOTES
PENCIL
Ice Erosion
 Snow and ice can form
glaciers in the mountains
 These glaciers move down
the mountainside acting as
bulldozers, picking up
rocks.
Gravity Erosion
 Gravity is the force that causes object to fall to
Earth.
 Rivers and glaciers flow downhill because of
gravity.
 Landslides and rock falls are a result of gravity.
Wrap it Up…
ODD MAN OUT….
Which one doesn’t belong, and why?
Glaciers
Landslides
Earthquakes
Volcanoes
Wrap it Up…
ODD MAN OUT….
Which one doesn’t belong, and why?
Water
Wind
Fire
Ice
Gravity
On Your Own….
Put your notes in the binder.
2. Complete the text book activity….(Chapter 1,
Lesson 2).
3. Read a science book from the front.
1.
Gravity
Wind
Wind erosion
happens mostly
along
the_______surface.
Wind _______ off
soil and small rocks.
Erosion
Water
Water is the __________
agent of erosion.
Rain water picks up soil and
sand as it _________.
Rivers __________ rocks
and soil.
Over many years, rivers move
enough materials to create
______________
Along the coast, the
________of the oceans move
sand and rocks.
Gravity is the force that
causes object to
______ to Earth.
Rivers and glaciers
______________
because of gravity.
_______________
_________ are a
result of gravity
Ice
Snow and ice can
form _______in
the mountains
These glaciers
move down the
mountainside
acting as
bulldozers,
___________.
What is deposition? How does this
relate to erosion and weathering?
MATERIALS….
BINDER
PENCIL
Erosion
Weathering
Deposition
With your neighbors, take two minutes to come up with a
definition of weathering and erosion.
Erosion
The carrying away of
sediments by
moving water, wind,
moving ice, or
gravity.
Weathering
A destructive force
that breaks down
earth’s surface
mechanically or
chemically.
What do you think Deposition is?
Deposition
What is deposition? What are examples of deposition?
What is deposition? What are examples of deposition?
Mississippi River Delta
What is deposition? What are examples of deposition?
Sand Dunes
Erosion
The carrying away of
sediments by moving
water, wind, moving
ice, or gravity.
Weathering
A destructive force
that breaks down
earth’s surface
mechanically or
chemically.
Deposition
The dropping, or
releasing of
sediments that have
been moved from one
place to another.
How do weathering, erosion, and deposition relate?
Wrap it Up….
Odd Man Out…
Himalayan Mountains
San Andreas Fault
Hawaiian Islands
Delta
On your own…
Complete the Weathering, Erosion, Deposition
Sort.
2. Complete your work from yesterday.
3. Read a science book from the front.
1.