Marking your Boundaries!! Welcome to…

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)): Mid-Atlantic Ridge East Pacific 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. Convergent boundary – two continental plates 2. Divergent boundary – two oceanic plates 3. 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

…the beauty of patterns and processes! There you have it…