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Plate margins
Q1. Which one of the following is associated with a mid ocean ridge?
Subduction zone |
Basaltic pillow lavas |
Ocean trench |
Deep focus earthquakes |
Explosive volcanic activity |
Q2. The flat part of ocean basins between the mid ocean ridges and oceanic trenches is known as:
Continental Shelf |
Abysmal Plain |
Abyssal plain |
Submarine plateau |
Continental slope |
Q3. Which one of the following statements is NOT true regarding oceanic lithosphere as the distance from mid ocean ridges increase?
It gets cooler |
It gets older |
It subsides |
It gets denser |
It changes in composition |
Q4. What is the average depth of the ocean floor between mid ocean ridges and oceanic trenches?
2 kilometres |
4 kilometres |
6 kilometres |
8 kilometres |
10 kilometres |
Q5. Which of the following forces is prevalent at divergent (constructive) plate margins?
Tensional |
Compressional |
Shear |
None |
Tensional and compressional |
Q6. Which one of the following would you NOT associate with divergent (constructive) plate margins?
Highly explosive volcanic activity |
Shallow focus earthquakes |
Basaltic fissure eruptions |
Tensional/extensional forces |
Sea floor spreading |
Q7. Which one of the following is NOT an example of a divergent (constructive) plate margin?
Iceland |
East Pacific rise |
Red Sea |
Carlsberg Ridge |
New Zealand |
Q8. At which type of plate margin would you expect to find ‘Black Smokers’?
Divergent (constructive) |
Convergent (oceanic-oceanic) |
Convergent (oceanic-continental) |
Convergent (continental-continental) |
Conservative |
Q9. Which one of the following would you NOT expect to occur at divergent (constructive) plate boundaries?
Tensional forces |
Basaltic volcanic activity |
Shallow focus earthquakes |
Transform faults |
Thick layer of sediment on the sea bed |
Q10. What are the main tectonic forces in operation at a conservative plate margin?
Tensional |
Compressional |
Shear |
None |
Tensional and compressional |
Q11. Which type of volcanic activity is associated with divergent (constructive) plate margins?
Andesitic |
None |
Basaltic |
Rhyolitic |
Pyroclastic |
Q12. Which type of seismic activity is associated with divergent (constructive) plate margins?
Shallow < 70 km deep |
Intermediate 70 - 300 km deep |
Deep > 300 km deep |
Earthquakes from 0 to 700 km deep |
None of the above |
Q13. At which type of plate margin would you expect to find a volcanic island arc?
Divergent (constructive) |
Convergent (oceanic-oceanic) |
Convergent (oceanic-continental) |
Convergent (continental-continental) |
Conservative |
Q14. At which type of plate margin would you expect to find the most explosive volcanic activity?
Divergent (constructive) |
Convergent (oceanic-oceanic) |
Convergent (oceanic-continental) |
Convergent (continental-continental) |
Conservative |
Q15. Which one of the following mechanisms is now considered to be the most important in explaining the movement of plates?
Ridge push |
Slab pull |
Convection |
Conduction |
Intrusion |
Q16. The main topographic feature that is found along the centre of mid-ocean ridges
Ocean trench |
Island arc |
Mountain belt |
Rift valley |
Thrust faults |
Q17. At which type of plate margin would you expect to find fold mountains such as the Himalayas?
Divergent (constructive) |
Convergent (oceanic-oceanic) |
Convergent (oceanic-continental) |
Convergent (continental-continental) |
Conservative |
Q18. Which one of the following is a characteristic of conservative plate margins?
Normal faults |
Transform faults |
Reverse faults |
Thrust faults |
An absence of faults |
Q19. What happens to oceanic lithosphere as it is subducted at a convergent (destructive) plate margin?
The mantle wedge above the subducted oceanic lithosphere melts to form andesitic magma |
The subducted oceanic lithosphere increases in thickness |
Nothing at all |
The subducted oceanic lithosphere melts to form basaltic magma |
The subducted oceanic lithosphere disintegrates |
Q20. What is the average rate of sea floor spreading in the Atlantic Ocean?
0.2 metres per year |
20 metres per year |
0.02 metres per year |
2.0 metres per year |
0.002 metres per year |
Q21. Which one of the following is not associated with a convergent (continental-continental) plate margin? (Collision zone)
Granite emplacement |
Fold mountains |
Basaltic volcanism |
Regional metamorphism |
Thrust faulting |
Q22. Which one of the following is not associated with a convergent (oceanic-oceanic) plate margin?
Granite emplacement |
Subduction zone |
Ocean trench |
Volcanic island arc |
Andesitic volcanic activity |
Q23. Which one of the following began to form by sea floor spreading 30 million years ago?
The Irish Sea |
The Dead Sea |
The Red Sea |
The Black Sea |
The Mediterranean Sea |
Q24. What is the name given to the zone of inclined earthquake foci at convergent (destructive) plate margins?
Benioff zone |
Hasselhoff zone |
Richter zone |
Mercalli zone |
Moho zone |
Q25. Which one of the following statements cannot be applied to Iceland?
It is located on a spreading ridge |
It is located on a hot spot |
A rift valley runs through the centre of it |
It is less than 10 million years old |
An ocean trench is found adjacent to it |
Q26. Which one of the following mountain ranges have been formed by continental collision at a convergent plate margin?
The Pennines |
The Andes |
The Himalayas |
The Rockies |
The Cotswolds |
Q27. Which one of the following Islands cannot be linked to processes operating at plate margins?
Fiji |
Hawaii |
Iceland |
Montserrat |
Japan |
Q28. Which one of the following would you not associate with a conservative plate margin?
California |
Transform faults |
Shallow focus earthquakes |
An absence of volcanic activity |
Subduction zone |