Question

The sliding of seafloor beneath a continent or island arc is known as

Question 1 options:

	obliteration.
	subduction.
	obduction
	obfuscation

Question 2 (1 point)

Which of the following is a characteristic or feature of a convergent plate boundary?

Question 2 options:

	plates pushing together
	subduction
	volcanic arc
	trench
	all of the above

Question 3 (1 point)

ocean-ocean convergent boundaries are also sites of subduction

Question 3 options:

	True
	False

Question 4 (1 point)

The subducting plate at a convergent boundary:

Question 4 options:

	is always the continental plate
	can be either the continental or oceanic plate - depends on the boundary
	is always the oceanic plate
	-

Question 5 (1 point)

What type of volcano is made up of alternating layers of ash, cinder, and lava?

Question 5 options:

	cinder cone
	stratovolcano
	lava dome
	shield volcano

Question 6 (1 point)

The majestic snow-covered peaks on the landward side of a subduction zone are usually what type of volcano?

Question 6 options:

	cinder cones
	stratovolcanoes
	basaltic plateaus
	shield volcanoes

Question 7 (1 point)

Explosive volcanic eruptions are associated with divergent plate margins

Question 7 options:

	True
	False

Question 8 (1 point)

Earthquakes occur most commonly in the middle of plates.�

Question 8 options:

	True
	False

Question 9 (1 point)

Every plate boundary can be recognized by ____________.

Question 9 options:

	the presence of active volcanoes
	the presence of an earthquake belt
	a deep chasm that can be seen from space
	None of the above are correct.

Question 10 (1 point)

If mid-ocean spreading was to stop, but subduction continue, which of the following would occur?

Question 10 options:

	Continents would begin moving toward each other.
	The surface area of the Earth would decrease.
	Sea level would rise.
	Both a and b are correct.
	All of the above are correct.

Question 11 (1 point)

At a convergent-plate boundary, two opposed plates ____________

Question 11 options:

	move toward one another
	move away from one another
	slide past one another

Question 12 (1 point)

Deep-oceanic trenches are features of ____________-plate boundaries.

Question 12 options:

	convergent
	divergent
	transform

Question 13 (1 point)

Large, thick, nonvolcanic mountain belts, like the Himalayas, have features associated with ____________-plate boundaries.

Question 13 options:

	convergent
	divergent
	transform

Question 14 (1 point)

The volcanoes of the Cascades Mountains are related to melting of rock associated with a ____________-plate boundary.

Question 14 options:

	convergent
	divergent
	transform

Question 15 (1 point)

At a subduction zone, the downgoing (subducting) plate ____________.

Question 15 options:

	is always composed of continental lithosphere
	is always composed of oceanic lithosphere
	may be composed or either oceanic or continental lithosphere

Question 16 (1 point)

At a subduction zone, the overriding plate ____________.

Question 16 options:

	is always composed of continental lithosphere
	is always composed of oceanic lithosphere
	may be composed of either oceanic or continental lithosphere

Question 17 (1 point)

A volcanic island arc forms when _______________.

Question 17 options:

	an oceanic plate subducts beneath continental lithosphere
	an oceanic plate subducts beneath another oceanic plate
	continental lithosphere subducts beneath an oceanic plate
	two oceanic plates collide

Question 18 (1 point)

From the list of statements below, select all that are true statements concerning convergent boundaries.

Question 18 options:

	At continent-continent collision boundaries the older continental plate subducts.
	Subduction zones all have the same seafloor age as there is a specific age at which seafloor becomes old and cold enough to subduct.
	The direction of subduction can be determined by looking at earthquake depths. Shallow earthquakes occur on the plate boundary and EQs become progressively deeper farther from the boundary on the overriding plate side if viewing on a map.
	Both types of subduction zone boundaries are characterized by deep sea trenches at the boundary and volcanic arcs on the overriding plate side.

Answer 1

Answer - 1)

The sliding of seafloor beneath a continent or island arc is known as Subduction. Hence, second option is correct.

Subduction occurs mainly at convergent boundaries of tectonic plates because of the presence of high gravitational potential energy into the mantle.

Answer-2)

characteristic or feature of a convergent plate boundary includes plate pushing together, volcanic arc, taking place at trenches, Subduction at occurs at this type of boundary. Hence, fifth option is correct that is all of the above. ​​​​​​

It is at convergent plate boundary where the collision of atleast 2 or more lithospheric plates take place. There are 3 types of convergent plate boundary namely oceanic-continental convergence, oceanic-oceanic convergence, and continental-continental.

Note :- As per HomeworkLib policy i am allowed to answer only the first question but since answer were small so I have answered 2 questions.

Hope this helps you !!!