Transcript Geography PowerPoint Lesson

Landforms and
Plate Tectonics
Grade 3 Geography
What will we be learning about?
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Different types of landforms and their
properties
How these landforms are created
Where these landforms are found
Characteristics you can use to
distinguish each type of landform
from another
First…
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We have to understand how the
surface of the earth works
The earth is made up of plates and
these plates can move; 250 million
years ago, the earth looked very
different because since then, these
plates have moved around
How about a puzzle?
Continued…
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So this shows how the plates can
move but what happens when they
grind up against each another?
When the plates
hit each other
they have to
move extra land
somewhere and
often it gets
pushed up to
make new
landforms
New Landforms
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So now that we know how many
landforms are created, lets learn
about some specific ones
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Islands
Peninsulas
Canyons
Plateaus
Mountains
Islands
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Surrounded by water on all sides
Not connected to any other pieces of land
Usually formed by underwater volcanoes or
the moving of the earths crust
Can you think of any examples?
Block Island, RI
Hawaii is actually a
chain of several
islands. We call this
an archipelago.
Peninsulas
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Surrounded by water on three sides,
but connected to a larger piece of
land on the fourth side
Sticks out like a finger
Can we think of any examples of this?
Florida
Cape Cod
Canyons
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A deep depression in the land that
extends in one direction
Has high cliffs on either side
Usually formed by rivers washing
away the land around them, this is
called erosion.
The Grand Canyon was
formed by the Colorado
River cutting away the
rock around it
Plateaus
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Higher than the surrounding land, but
flat on top with steep, sloped sides
These are often formed by the moving
of the earths crust and erosion
Examples?
Ayers Rock in
Australia
Mountains
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Extends high above the rest of the land
around it and has steep sides
Formed when two plates from the earths crust
push against each other and force land
upward
Mountains we can think of?
Mount McKinley, AK
A chain of mountains, like
the Himalayas, is called a
mountain range.
Conclusion
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So we have learned about 5 new
landforms that are found around the
world
We can identify them and distinguish
them from each other
And we can tell how they are formed
How about a little practice quiz?
Mountain
Island
Canyon
Peninsula
Plateau
Credits
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wikipedia.org
amonline.net
discoverourearth.org
thedangchannel.com
rateitall.com
Google images
inkycircus.com
wiki.phantis.com
nasa.gov
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destination360.com
virtualtourist.com
traveladventures.org
birdsasart.com
block-island-familyvacations.com
brad-stone.com
taliesonrealty.com