Question

At transform boundaries:

Question 1 options:

	plates slide past one another along the surface of the earth
	plates are moving away from each other
	plates are moving towards each other

Question 2 (1 point)

Which of the following is a type of plate boundary where new sea floor is formed?

Question 2 options:

	divergent
	convergent
	emergent
	transform

Question 3 (1 point)

What type of plate boundary mainly surrounds the Antarctic Plate?

Question 3 options:

	convergent
	divergent
	transform
	-

Question 4 (1 point)

The farther from the mid ocean ridge, the ___________ the oceanic lithosphere

Question 4 options:

	older and more dense
	younger and more dense
	younger and less dense
	older and less dense

Question 5 (1 point)

At transform-plate boundaries ____________.

Question 5 options:

	earthquakes are common but volcanoes are absent
	volcanoes are common but earthquakes do not occur
	both earthquakes and volcanoes are common

Question 6 (1 point)

The San Andreas Fault zone in southern California is an example of a ____________-plate boundary.

Question 6 options:

	convergent
	divergent
	transform

Question 7 (1 point)

Segments of the mid-ocean ridge system are offset. Between the offset segments we observe ____________.

Question 7 options:

	a second series of ridges, perpendicular to the main set
	deep-ocean trenches
	transform faults
	None of the above are correct.

Question 8 (1 point)

The mid-ocean ridges are elevated above the surrounding sea floor because ____________.

Question 8 options:

	ridge rocks are hot and therefore of relatively low density
	the lithospheric plates are thickest at the ridges so that they stand up taller
	rising ocean currents leave a vacuum above the ridge
	ridge rocks are mafic, whereas the ocean basin crust consists of ultramafic rock

Question 9 (1 point)

Which of the following is a type of plate boundary where new sea floor is formed?

Question 9 options:

	divergent
	convergent
	emergent
	transform

Question 10 (1 point)

Which of the following features characterize a divergent plate boundary?

Question 10 options:

	a) mid ocean ridge system if boundary is in the ocean
	b) hydrothermal vents and/or volcanoes
	c) oldest rocks of the ocean crust
	d) shallow focus earthquakes
	e) all of the above
	f) a and b only
	g) a, b, and c only
	h) a, b, and d only

Question 11 (1 point)

Examples of divergent boundary areas located on land (above sea level where we can see them!) include: (select all that apply)

Question 11 options:

	Peru-Chile Trench
	East African Rift
	San Andreas Fault System
	Iceland
	East coast of the United States

Question 12 (1 point)

The age of oceanic crust ____________ with increasing distance from a mid-ocean ridge.

Question 12 options:

	increases
	decreases

Question 13 (1 point)

As lithosphere cools to the sides of a mid-ocean ridge, it begins to ____________.

Question 13 options:

	rise with respect to material located closer to the ridge axis
	sink with respect to material located closer to the ridge axis

Question 14 (1 point)

Why is the ocean deeper over older ocean floor than younger ocean floor?

Question 14 options:

	The deeper ocean floor is below 1,280°C.
	The deeper ocean floor is older than 80 million years old.
	The deeper ocean floor is thick and dense.
	All of the above are correct.

Question 15 (1 point)

Iceland is one of the few places in the world that is both above sea level and situated atop a ____________ plate boundary.

Question 15 options:

	convergent
	divergent
	transform

Question 16 (1 point)

Mid-ocean ridges are ____________.

Question 16 options:

	convergent-plate boundaries
	divergent-plate boundaries
	transform-plate boundaries

Answer 1