CHAPTER TWO - READING QUIZ QUESTIONS

If the rate and direction of plate movement remain the same for the next 50 million years, an accurate prediction would then be:

Accretion of the California Terrane onto Alaska

Which of the following is the main reason that Earth has a magnetic field?

Convection in the liquid iron-nickel outer core generates a magnetic field.

Iceland is located on what type of plate boundary?

Divergent

Which of the following is an example of a nematath?

Hawaiian Islands-Emperor Seamount Chain

Which of the following statements accurately describes a segment of the mid-ocean ridge spreading at a rate of 3 centimeters per year?

It would be classified as an oceanic ridge and it would have a prominent and deep rift valley.

Consider the geologic fate of the following seamounts and islands in the Hawaiian Island-Emperor Seamount chain. Assuming conditions remain favorable for coral growth, which would most likely be the next to form an atoll?

Kauai

Of the following statements about ocean crust, which is/are true?

Ocean crust is created at the mid-ocean ridge and Ocean crust is destroyed at deep sea trenches.

Of the following statements about Earth's magnetic field, which is/are true?

The lines of the magnetic force are parallel with Earth's surface at the equator, The lines of the magnetic force are perpendicular relative to Earth's surface at the magnetic south pole, The magnetic north pole may reverse so that it is located near the geographic south pole, and The lines of the magnetic force are perpendicular relative to Earth's surface at the magnetic north pole.

Why does the sea floor have a striped pattern of magnetic anomalies that is symmetric with respect to the mid-ocean ridge?

The ocean floor is spreading apart and new sea floor is forming, The igneous rock of the ocean floor preserves Earth's existing magnetic field as the rock cools, and The polarity of Earth's magnetic field experiences reversals.

Of the following statements about the age of the ocean crust, which one is true?

The oldest ocean crust is about 200 million years old and is located near an ocean trench.

What do all plate boundaries have in common?

They are all associated with zones of earthquakes.

Of the following statements about sea floor magnetic anomalies, which is true?

They are oriented parallel to the mid-ocean ridge.

Of the following statements about nemataths and volcanic arcs, which is/are true?

Volcanic arcs are associated with convergent plate boundaries, In a volcanic arc, any of the volcanoes can be active at any time, and Nemataths and volcanic arcs are both the result of volcanic activity.

Evidence shows that periodic reversals of Earth's magnetic field have resulted in __________.

a symmetrical pattern of normal and reverse magnetization in ocean crustal rocks

Numerous small, shallow earthquakes tend to occur at __________.

divergent plate boundaries Submit

Which of the following lines of evidence did Alfred Wegener use to support the concept of drifting continents?

evidence of glaciers in areas that are now tropical, the distribution of species of fossils, the way the shapes of the continents fit together like pieces of a jigsaw puzzle, and the pattern of similar mountain belts on different continents

Earthquakes can occur only in the __________.

lithosphere

A trench and a chain of volcanoes known generally as a volcanic arc are always present where there is __________.

subduction

Compared to the rest of the planet, an unusually high concentration of hot spots and rifting is located on the continent of Africa. A likely explanation for this is that __________.

the African Plate is essentially stationary with respect to Earth's interior and the thick continental crust acts as a "heat blanket"

The flat top of a guyot or tablemount in deep water is evidence that __________.

the seamount was once at the surface of the ocean, but is now submerged due to plate movement and erosion when it was near sea level