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Social Studies
Lesson 1 Earth’s Landforms
Write a paragraph using the
words below. You may not use
your book.
landforms
plate tectonics
continental drift
fault
weathering
erosion
floodplain
deposition
delta
word splash
A floodplain is plain that has been
flooded. A landform is land that is in a
different form. A delta is a narrow
stream. Erosion is when a river slowly
wears down a landform.
Essential Question
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How do forces of the Earth cause
geographic changes?
With a partner, define the vocabulary. Must
be completed for homework if not finished.
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Landforms
Plate Tectonics
Continental Drift
Fault
Delta
Weathering
Erosion
Deposition
Floodplain
How do forces of the earth cause geographic
changes?
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Turn to page 20 in your textbook.
Together we will read pages 20-23.
Video: Continents Adrift
Do Now- 10-5-11
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Take out your fact sheet from the video
we watched in class yesterday.
Get with a partner other than the
person sitting next to you and exchange
your facts with them.
A. Plate Tectonics
The theory that earth’s surface is divided into several
major, slow-moving plates or pieces.
1. Layers of the Earth- Like an Apple or a Peach
Crust- 10-25 Miles Thick
b.
Mantle 1,800 Miles Thick- hot rock like material
c.
Outer Core- molten or melted
d.
Inner Core solid
2. Pangaea
a.
The name given to Earth’s landmasses when it formed one huge
supercontinent.
a.
3. Continental Drift Theory
a.
Forces within earth caused Pangaea to break apart into
continental plates and drift apart.
4. Mountain formation
a.
tectonic plates push together
b.
two plates collide and one moves up over the other
B. Earthquakes
1.
2.
Plates shake causing an earthquake
A fault is a break in Earth’s crust
where movement occurs.
C. Volcanoes
1.
2.
3.
Plates push against each other
creating cracks in the crust onto
Earth’s surface.
Heat within the mantle causes rock in
the lower plate to melt. This molten
rock is magma.
Lava is the name for magma that has
escaped onto the surface.
Read page 23-24 Shaping
Earth’s Surface silently.
D. Weathering
The process of breaking up rocks into smaller pieces called sediments.
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..\..\..\Social Studies\Chapter 1\Chapter
1lfs\Chapter 1 Lesson 1\Weathering
and Erosion pictures pp.ppt
..\..\..\Social Studies\Chapter
1\Weathering_and_Erosion.asf
D. Weathering
The process of breaking up rocks into smaller pieces called
sediments.
1.
2.
3.
4.
5.
Water
* Gravity
Wind
* Plants
Temperature
Erosion- process of moving sediments.
Deposition- process of dropping
sediments in a new location
Humans
Read Page 25 – People Change the Land
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F:\Social Studies\Chapter 1\Humans
and earth.asf
E. Humans
1.
2.
3.
4.
5.
Build farms and cities
reshape waterways
create new waterways (lakes etc)
Build dams
drain water and direct water to areas
of need. (irrigation systems)
Ticket Out the Door
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Name three forces of the Earth that
cause geographic changes. Explain how
each force changes the earth.
Answer the Essential Question
How do forces of the earth cause
geographic changes?
There are many forces that change what the
Earth looks like.
(Explain how each one works.)
Do Now
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Be prepared for your summarization
activity.
Do Now
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Take out your handout “Earth’s
Landforms”
Discuss the ticket out the door response
with a neighbor.