Transcript Slide 1 - Duplin County Schools

Plate Boundaries
The Earth’s continents and oceans all
plates called
rest on large, moving _______
tectonic plates. There are ________
________
dozens of
these plates.
Each plate touches several other
plates. The point at which one
tectonic plate touches another is
called a plate __________.
boundary
When two plates move toward
each other and collide, it is called
a convergent
____________ boundary.
We will look at three different types of
convergent boundaries:
 Oceanic to continental convergent
boundaries
 Oceanic to oceanic convergent
boundaries
 Continental to continental
convergent boundaries
________________________
Oceanic to continental convergence is when a
collides with a relatively
dense oceanic plate ________
light, thick continental plate. The denser oceanic
pushed underneath the continental plate.
plate is ________
subduction The continental plate is
This is called ____________.
mountain range is created.
lifted up and a ___________
Video : http://www.youtube.com/watch?v=Wt_jJUnTFhg
Andes
The _______
Mountains in South
America are an
example of this
type of mountain
range.
Oceanic
to oceanic convergence is when
___________________
two oceanic plates collide. One plate is
usually ___________
subducted under the other. This will
form a deep oceanic ________.
trench
Mariana Trench is a deep trench created as
The _________
the result of the Philippine Plate subducting under
the Pacific Plate. This is the _________
deepest part of the
world’s oceans.
This convergence can also result in the
volcanoes Over
formation of undersea ___________.
many years the volcanoes can rise above
island
sea level and form an _______volcano.
Many are strung out in chains called island
arcs.
Continental to continental convergence is
__________________________
when two continents meet head-on. The
crust tends to _______
buckle and be pushed
upward to form mountain ranges.
The collision of the Indian and Eurasian
Himalaya
plates are responsible for the __________
Mountains, the world’s highest
mountains.
Eurasian Plate
Indian Plate
Convergent boundaries occur
downward flowing
above ___________
convection currents.
When two plates are moving away
from each other it is called a
divergent boundary.
___________
oceanic divergent plate
First, there are _________
boundaries. When this boundary is located
in the ocean, it results in the formation of
magma that
crust from ________
new oceanic ______
comes from within the Earth's mantle along
a mid-ocean ridge.
WATCH THE FOLLOWING ANIMATION (scroll down)
http://www.kidsgeo.com/geology-for-kids/0045-divergentboundaries.php
The process in which new oceanic
lithosphere is formed at a midocean
ridge is referred to as
__________________.
seafloor
spreading
Animation created by the US Geological Society.
Mid-Atlantic Ridge is an example of an
The ___________________
oceanic divergent boundary. It is located
Atlantic Ocean. It is an
along the floor of the ________
immensely long mountain chain that extends
for about 10,000 miles (16,000 km). Most of
under water.
the range is ______
Next, there are continental
___________ divergent plate
boundaries. Here a continental plate is
being pulled
______ apart. The result is a
rift valley A rift valley is a lowland
__________.
between highlands or a mountain range.
The East African
_______ Rift Valley is an
example of this type of plate
boundary.
Here the African Plate is in the process of
splitting into two new tectonic plates. The
surface of the Earth ________
widens over time
water from streams
and often fills with ______
and rivers creating lakes or seas.
Another example can be found in Iceland.
Mid-Atlantic
Iceland is splitting along the _____________
Ridge. Over time, Iceland may break into
two separate land masses as water fills the
rift being formed.
Aerial view of Iceland. Can you identify the boundary?
Divergent boundaries occur above
________
upward flowing convection currents.
This diagram illustrates the progression of a
continental divergent boundary over a long
period of time.
transform boundary is found where two plates
A __________
are sliding past each other horizontally. The plates
slip, then stick as the friction and pressure builds.
When the pressure is released, the plates suddenly
earthquake
jerk apart and cause an ____________.
San Andreas Fault in California is an
The ___________________
example of a transform boundary where the
North American and Pacific plates are
moving horizontally past each other.
SAN ANDREAS FAULT, CA
PLATE BOUNDARIES REVIEW
• Divergent Boundary – moving
_______
apart
• Convergent Boundary – moving
together
___________
• Transform Fault Boundary – moving
sideways past each other
_____________________________.
RESOURCES
http://en.wikipedia.org/wiki/List_of_tectonic_plates
http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml
http://geography.howstuffworks.com/south-america/the-andes.htm
http://www.dailygalaxy.com/my_weblog/2012/03/james-cameron-avatar-directorexplores-mariana-trench-deepest-spot-of-the-planet.html
http://en.wikipedia.org/wiki/Mariana_Trench
http://gozips.uakron.edu/~jre10/dreamweaver/physical.html
http://www.cliffshade.com/colorado/images/himalaya.gif
http://gomyclass.com/geology10/files/lecshare1/html/images/objects/obj50-1.jpg
http://www.windows2universe.org/teacher_resources/magnetism/mid_atlantic_ridge_1
0_inch.jpg
http://www.btinternet.com/~mr.larsen/images/MidOceanSpread.jpg
http://images.angelpub.com/2010/35/5721/africa-rift.png
http://www.platetectonics.com/book/page_5.asp
http://www.geology.iupui.edu/research/klicht/Iceland/Geologic%20Features/Images/R
ift%20Valley/P1080005.JPG
http://thegeosphere.pbworks.com/w/page/22058912/Types%20of%20Plate%20Boundari
es
http://geography-site.co.uk/pages/physical/earth/tect.html
http://www.cms.fu-berlin.de/geo/fb/elearning/geolearning/en/mountain_building/plate_tectonics/plate2/
http://openhighschoolcourses.org/mod/book/tool/print/index.php?id=6645