Plate Boundaries

Which of the following is NOT a characteristic of trenches?

• They are formed from the splitting of two oceanic plates.

• They are produced because of subduction process.

• They are formed parallel to volcanic island arc.

• They are called submarine valleys.

What are the geologic processes/ events that will occur because of the convergence of two oceanic plates?

I. Subduction process will occur.

II. Trenches will form.

III. Earthquakes can happen.

IV. Mid-ocean ridge will form.

• I,II,IV

• II,III,IV

• I,II,III

• I,III,IV

What are the geologic processes/ events that will occur because of the convergence of two continental plates

I. Subduction process will occur.

II. Trenches will form.

II. Deep Earthquakes can happen.

IV. Volcanoes will form.

• I,II,III,IV

• I,II,III

• I,II

• None of these.

The letter B represents

• Subduction zone

• Trench

• Oceanic crust

• Forearc Basin

Which of the following is a divergent plate boundary?

• 
• 
• 
• 

If the Atlantic Ocean is widening at a rate of 2 cm per year how far (in km) will it spread in a million years?

• 200 km

• 20 km

• 2.0 km

• 0.2 km

If the edge of Oceanic Plate suddenly flicks upward, a large amount of water may be displaced. What could be formed at the surface of the ocean?

• earthquake

• volcanic island arc

• tsunami

• hot spot

Which of these is NOT true about the Philippine islands?

• most are part of the Philippine Mobile Belt, except for Palawan, Mindoro, and Zamboanga

• formed because of the convergence of the Philippine plate and the Pacific plate

• originated geologically in an oceanic-oceanic convergence

• Trenches are formed because of subduction process

In a hot spot, Volcano A is on top of the mantle plume, Volcano B is 10 km farther from A while Volcano C is the farthest. What can you infer about the ages of the volcanoes?

• Volcano A is older than C.

• Volcano B is the youngest.

• Volcano B is the oldest.

• Volcano B is younger than C.

Right in the middle of an island, you can find a rift valley. What type of plate boundary exists on that island?

• Continental - Oceanic convergent boundary

• Divergent boundary

• Oceanic-Oceanic convergent boundary

• Transform fault boundary