Exam 2: Plate Tectonics and the Ocean Floor

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

Match the term with the appropriate phrase. You may use each answer once, more than once or not at all. -ancient precursor of the Pacific Ocean

Moving from an oceanic ridge to an oceanic trench, the thickness of the lithosphere:

The Wilson Cycle uses plate tectonic processes to show the life cycles of ocean basins during their growth, formation, and destruction over geologic time.

Coral reefs that initially develop along the margin of an island or continent where environmental conditions are suitable are called:

Answer: Earthquakes are sudden releases of energy usually caused by the movement of lithospheric plates or volcanic eruptions. The global distribution of earthquakes, such as the pattern shown in Figure 2.13, indicates that most occur along oceanic trenches, reflecting the energy released during the process of subduction. Other earthquakes occur along divergent plate boundaries at seafloor spreading centers along the global oceanic ridge system. Comparison of earthquake activity with the boundaries of plates indicates a high degree of correspondence. Essent'l Concept: 2.2 Describe the evidence that supports plate tectonics -How are convergent and divergent plate boundaries related to constructive and destructive plate margins?

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.

The magnetic north pole has remained very close to the geographic North Pole throughout all of geologic time.

Fast-moving spreading zones tend to be more gently sloping than slow-moving ridges.

Iceland is geologically active because it is located along the mid-Atlantic ridge.

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.

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.

The San Andreas Fault:

-Discuss changes in the lithosphere that occur between an oceanic ridge and an oceanic trench.

The origin of many seamounts and tablemounts is related to volcanic activity occurring at hotspots.

The study of historical changes of continental shapes and positions is called:

The first person to advance the idea of mobile continents or continental drift was:

Briefly discuss four important lines of evidence that support the theory of continental drift.

Deep ocean trenches are associated with:

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