Exam 2: Plate Tectonics and the Ocean Floor

Examine the five words and/or phrases and determine the relationship among the majority of words/phrases. -Choose the one option that does not fit the pattern.

Coral reefs:

island arc

Why are earthquakes associated with plate boundaries?

Which of the following statements is true of the lithosphere?

The magnetic field of the Earth reverses itself each time that magma erupts at a mid-ocean ridge.

hydrothermal vents

Water depth decreases as you move away from the mid-ocean ridge.

Convergent plate boundaries occur when tectonic plates move in opposite directions.

Confirmation of seafloor spreading was supported by the:

All continents fit together with the least number of overlaps and gaps when the continents are matched along:

All of the following provide evidence for continental drift except:

Which of the following statements is true of the asthenosphere?

Briefly discuss four important evidences that support continental drift.

How does convection in the asthenosphere explain ocean basin features, heat flow, and lithosphere thickness?

Oceans become deeper moving away from ridges due to:

Deep ocean trenches are associated with:

New crust is formed at trenches and old crust is subducted at ridges.

Describe the formation of the magnetic pattern on the seafloor.