Transcript Social Studies Mystery - PAMS-Doyle

Objectives
• Classify mountains according to how they
are formed.
• Describe the Himalaya Mountains.
• Explore the relationship between plate
tectonics and mountain formation.
The Himalayas
The Himalayas are the tallest mountains in the world.
They are located on the border of China and India.
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What do you think?
How were the Himalayas formed?
Why are the Himalayas the tallest
mountains in the world?
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Investigating the Question
Mountain ranges are formed by plates made
from the earth’s crust that move against
each other.
The plates that form the Himalayas are still
moving!
How do you think this affects the mountains
today?
Plate Tectonics
Eurasian
Plate
Plates
Indian
Plate
The earth’s crust is split into several plates.
These plates float on top of magma (a hot, thick, gellike substance).
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Plate Tectonics
Eurasian
Plate
Plates
Indian
Plate
When currents inside the earth move the magma, the
plates move, too.
This movement sometimes causes mountains to form.
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Just Checking
Answer the following questions on your worksheet
• The earth’s crust is split into __________.
• The hot, thick, gel-like substance found
within the earth is called ___________.
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There are 3 types of mountains:
1. Volcanic Mountains
2. Fault-block Mountains
3. Folded Mountains
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Volcanic Mountains
Volcanoes form when magma within the earth
pushes its way up through the crust.
While pushing through the crust, the pressure causes
the surrounding crust to rise, forming a mountain.
Magma is deposited on the surface, sometimes
creating a cone shaped mountain.
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Fault-block Mountains
Fault-block mountains form when rock layers break
and form a fault line.
As the two blocks are being pushed together, the
pressure forces one block up and the other block down.
The block that is forced upward forms a mountain.
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Folded Mountains
Folded mountains form as two plates move toward
each other.
The plates push against each other causing the
crust to fold or ripple
This is like when you push 2 ends of a piece of
paper together and the middle bends or folds.
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Just Checking
Fill in the blanks on your worksheet
• Mountains that form when magma within the earth
pushes its way up through the crust. __________
• Mountains that form when a plate cracks and forms
a fault line. ______________
• Mountains that form when plates push up against
each other causing the crust to fold or ripple.
______________
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Himalayas
The Himalayas formed as a result of the Indian Plate and
the Eurasian Plate moving toward one another.
When two plates collide, they will do one of the following:
1.
If one plate is denser (heavier) than the other, it will sink below the
other plate
Denser
plate
2.
If both plates have the same density, they will continue to push against
one another resulting in folded mountains.
Same
Density
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The Himalayas
Both of these plates are the
same density.
As the plates keep pushing
against each other, there is
no place for the crust to go
except to bend upwards.
Himalayas
The plates are still running
into each other and the
Himalayas are growing by
more than 1 cm each year.
Indian
Plate
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Eurasian
Plate
Just Checking
Answer the following questions on your worksheet
• The Himalayas are ___________ mountains.
• The Himalayas are the result of what two plates
running into each other?
________________ and _______________
• Neither of these two plates is sinking because they
are both the same ___________.
• The Himalayas are still growing at a rate of
___________ each year.
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