Download Plate Boundaries

Types of Plate Boundaries
The earth’s crust
• A. Is one continuous layer of rock with no
breaks
• B. Can be classified into two types
(continental & oceanic)
• C. Is split into smaller pieces called plates
• D. Both B and C
The earth’s crust
• A. Is one continuous rock
• B. Can be classified into two types
(continental & oceanic)
• C. Is split into smaller pieces called plates
• D. Both B and C
The Earth’s plates
• A. Move quickly around the surface of the
earth
• B. Sometimes run into each other
• C. Never move
• D. Never touch
The Earth’s plates
• A. Move quickly around the surface of the
earth
• B. Sometimes run into each other
• C. Never move
• D. Never touch
Why do plates move?
• A. Magma circulating in the mantle moves
them around
• B. Explosions from undersea volcanoes
propel the plates apart
• C. The plates repel and attract each other
because they are magnetic
Why do plates move?
• A. Magma circulating in the mantle
moves them around
• B. Explosions from undersea volcanoes
propel the plates apart
• C. The plates repel and attract each other
because they are magnetic
Mantle Convection
• Differences in
temperature cause
material to circulate
Plates are Pushed & Pulled
Draw this plate boundary
What type of plate boundary is this?
•
•
•
•
A.
B.
C.
D.
Convergent Plate Boundary
Divergent Plate Boundary
Transform Plate Boundary
Bivergent Plate Boundary
What type of plate boundary is this?
•
•
•
•
A.
B.
C.
D.
Convergent Plate Boundary
Divergent Plate Boundary
Transform Plate Boundary
Bivergent Plate Boundary
What happens at a divergent
boundary?
•
•
•
•
A. Two plates move together
B. Two plates move past each other
C. Two plates move apart
D. nothing
What happens at a divergent
boundary?
•
•
•
•
A. Two plates move together
B. Two plates move past each other
C. Two plates move apart
D. nothing
Divergent Plate Boundary
• Starts on land as a rift valley
• Ends up as a mid-ocean ridge (after millions
of years)
Divergent Boundary Formation
Divergent Boundary Formation
Divergent Boundary Formation
Divergent Boundaries
• Locations:
• Mid-Atlantic Ridge (Middle of Atlantic Ocean)
• East African Rift Zone
What type of plate boundary is this?
What type of plate boundary is this?
•
•
•
•
A.
B.
C.
D.
Convergent Plate Boundary
Divergent Plate Boundary
Transform Plate Boundary
Bivergent Plate Boundary
What type of plate boundary is this?
•
•
•
•
A.
B.
C.
D.
Convergent Plate Boundary
Divergent Plate Boundary
Transform Plate Boundary
Bivergent Plate Boundary
What happens at a convergent
boundary?
•
•
•
•
A. Two plates move together
B. Two plates move past each other
C. Two plates move apart
D. nothing
What happens at a convergent
boundary?
•
•
•
•
A. Two plates move together
B. Two plates move past each other
C. Two plates move apart
D. nothing
How many types of convergent
boundaries are there?
•
•
•
•
A. 1
B. 2
C. 3
D. 4
How many types of convergent
boundaries are there?
•
•
•
•
A. 1
B. 2
C. 3
D. 4
Converging Oceanic/Continental
• An oceanic plate and a continental plate
meet
• The denser oceanic plate sinks underneath
the continental plate
• Called subduction
• Produces volcanoes on the continental plate
Draw this Oceanic/ Continental
Convergent Boundary
Converging Oceanic/Continental
• Locations
– Washington and Oregon (Cascade Mountains)
– Andes Mountains (South America)
Converging Oceanic/Oceanic
• Two oceanic plates meet
• The oceanic plate with older crust is colder
so it is
–
–
–
–
A. Less Dense
B. Denser
C. Thicker
D. Hotter
Converging Oceanic/Oceanic
• Two oceanic plates meet
• The oceanic plate with older crust is colder
so it is
–
–
–
–
A. Less Dense
B. Denser
C. Thicker
D. hotter
Converging Oceanic/Oceanic
• It subducts underneath the less dense plate
• Volcanoes form on the upper plate
Converging Oceanic/Oceanic
• Locations:
– Japan
– The Philippines
Converging Continent/Continent
• Two continental plates with the same
density meet
• True or False:
– Subduction can occur?
• FALSE!
– Volcanoes can form?
• FALSE!
– Mountains form?
• TRUE!
Converging Continent/Continent
Converging Continent/Continent
• Locations:
– Himalayas (between India and China)
India Collides with Asia
Draw this plate boundary
What type of plate boundary is this?
•
•
•
•
A.
B.
C.
D.
Convergent Plate Boundary
Divergent Plate Boundary
Transform Plate Boundary
Bivergent Plate Boundary
What type of plate boundary is this?
•
•
•
•
A.
B.
C.
D.
Convergent Plate Boundary
Divergent Plate Boundary
Transform Plate Boundary
Bivergent Plate Boundary
What happens at a TRANSFORM
boundary?
•
•
•
•
A. Two plates move together
B. Two plates move past each other
C. Two plates move apart
D. nothing
What happens at a TRANSFORM
boundary?
•
•
•
•
A. Two plates move together
B. Two plates move past each other
C. Two plates move apart
D. nothing
Transform Boundary
• Locations:
– California (San Andreas Fault)
Hot Spots
• Occur in the middle of plates (not a plate
boundary)
• Very hot area of mantle (Mantle plume)
melts through the crust
• Stationary (never move)
• As plate moves, mantle plume will melt
several holes in the crust, forming a chain of
volcanoes
Hot Spots
• Which of these chains of volcanoes is
caused by a hot spot?
–
–
–
–
A. Japan
B. Hawaii
C. The Andes in South America
D. The Cascades in North America
Hot Spots
• Which of these chains of volcanoes is
caused by a hot spot?
–
–
–
–
A. Japan
B. Hawaii
C. The Andes in South America
D. The Cascades in North America
• The rest are convergent boundaries
Hot Spots
Seamounts and Plate Movement
Hot Spot Locations
• Hawaii
• Wyoming
(Yellowstone National
Park)