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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

Which is associated with mid

Mid-ocean ridges occur along divergent plate boundaries, where new ocean floor is created as the Earth's tectonic plates spread apart. As the plates separate, molten rock rises to the seafloor, producing enormous volcanic eruptions of basalt.

Which one of the following is not associated with mid

Explanation: Mid-ocean ridges form near divergent plate boundaries, where the new ocean bottom is formed when tectonic plates separate. The Molten rock rises to the seafloor as the plates separate, resulting in massive basalt volcanic eruptions.

What does the mid

Mid-ocean ridges represent a chain of underwater mountains formed by seafloor spreading at divergent plate boundaries. A divergent plate boundary refers to a region where two or more tectonic plates (or parts of the Earth's crust) move away from each other.

Where is the mid

The Mid-Atlantic Ridge is located at the juncture of crustal plates that form the floor of the Atlantic Ocean; it is considered a "slow-spreading" ridge by earth scientists. Running along the crest of the ridge is a long valley that is about 50 to 75 miles (80 to 120 km) wide.