Transcript Marking your Boundaries!!

Welcome to…
Marking your Boundaries!!
QUESTION 1:
At what sort of plate boundary would you find
an ocean ridge?
(2 points)
BONUS QUESTION 1(A):
Name an example of an ocean ridge and
label it on the map!
(5 bonus marks!)
QUESTION 2:
At what sort of plate boundary would you find
island arcs?
(2 points)
BONUS QUESTION 2(A):
Explain the formation of island arcs!
(3 bonus points!)
QUESTION 3:
Name one plate boundary that experiences
shallow earthquakes.
(2 points)
QUESTION 4:
At what sort of plate boundary would you find
a rift valley?
(2 points)
BONUS QUESTION 4(A):
Explain the formation of a rift valley with aid
of diagrams!
(5 bonus points!!)
BONUS BONUS QUESTION 4(B)!
Describe and explain the development of the
rift valley over time.
(3 bonus points!)
QUESTION 5:
At what sort of plate boundary would you find
an ocean trench?
(2 points)
BONUS QUESTION 5(A):
Name an example of an ocean trench and
mark its location on the map!
(5 bonus points!!)
QUESTION 6:
At what sort of plate boundary would you find
fold mountains?
(2 points)
QUESTION 7:
At what sort of plate boundaries would you
find volcanoes?
FINAL BONUS QUESTION!
Draw arrows to mark out a pair of convergent
plates and a pair of divergent plates.
(8 bonus marks!)
Answer (Q1):

At a divergent plate boundary, between two
oceanic plates
Answer (1(a)):
East Pacific Ridge
Mid-Atlantic Ridge
Answer (Q2):

Convergent boundary, between two oceanic plates
Answer (Q2(a)):




Frictional heat at the oceanic boundaries is high
Magma produced from melting of oceanic crust is
different from that of continental crust
 Abundant molten magma
Abundant volcanoes form (submarine volcanoes)
As the volcanoes build up over time and appear at the
surface, this chain of volcanoes appearing over the water
is known as island arcs
Answer (Q3):
(Any one of the following…)
1.
2.
3.
Convergent boundary – two continental plates
Divergent boundary – two oceanic plates
Transform boundary
Answer (Q4):

At a divergent plate boundary, between two
continental plates
Answer (Q4(a)):
Answer (Q4(b)):



Rift valley  mid-oceanic ridge
Continental plates  oceanic plates
How?
 Crust
continues to widen and thin as it stretches out due
to the spreading of the magma beneath
 Valley formed is increasingly filled with water from the
surrounding oceans
Answer (Q5):

At a convergent plate boundary, between an
oceanic plate and a continental plate
Answer (Q5(a)):
Answer (Q6):

At a convergent plate boundary, between two
continental plates
Answer (Q7):

All except at continental-continental convergent
boundary and transform boundary…
Answer (Final BQ!):
END
Cotopaxi,
Ecuador
Indian plate is continuously moving north at the rate of about 2 cm every year.
Himalayas are rising at the rate of about 5 millimeter per year
Himalayas are still geologically active and structurally unstable
Earthquakes are a frequent occurrence in the entire Himalayan region.
Sakura-jima
There you have it…
…the beauty of patterns and processes!