Landforms and Plate Tectonics Grade 3 Geography. What will we be learning about? Different types of landforms and their properties How these landforms.
Post on 31-Dec-2015
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What will we be learning about?
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…
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…
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
So now that we know how many landforms are created, lets learn about some specific ones Islands Peninsulas Canyons Plateaus Mountains
Islands
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?
Hawaii is actually a chain of several islands. We call this an archipelago.
Block Island, RI
Peninsulas
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
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
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
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?
A chain of mountains, like the Himalayas, is called a mountain range.Mount McKinley, AK
Conclusion
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?
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