Question 1

The city of Los Angeles can be found on which tectonic plate?&#10;A) Pacific Plate&#10;B) North American Plate&#10;C) Juan de Fuca Plate&#10;D) Nazca Plate

Accepted Answer

Los Angeles is located on the boundary of the Pacific Plate and the North American Plate. However, the majority of the city sits on the Pacific Plate.

Question 2

Which evidence did Alfred Wegener NOT use to support his hypothesis of one large supercontinent named Pangaea and its subsequent break up?&#10;A) fossils of plants and animals were found on different continents&#10;B) ocean floor drilling exposing remnants of similar continental rocks of two separate continents&#10;C) geographic fit of continents&#10;D) glacial features displaying direction of motion

Accepted Answer

Alfred Wegener did not use ocean floor drilling as evidence to support his hypothesis of Pangaea and its subsequent breakup. This is because ocean floor drilling did not exist during his time, and the technology was not developed until many years later.

Question 3

Alfred Wegener proposed that there was once a giant supercontinent he called Pangaea. He used the following evidence to support his hypothesis:&#10;A) matching fossils across distant continents&#10;B) matching similar rock types across distant continents&#10;C) geographic fit of continents&#10;D) all of the above

Accepted Answer

Wegener used all three types of evidence (matching fossils, matching rock types, and geographic fit) to support his hypothesis of Pangaea.

Question 4

Cold, old oceanic crust can be found:&#10;A) along convergent plate boundaries near subduction zones&#10;B) at the northernmost section of transform boundaries&#10;C) at mid-ocean ridges&#10;D) none of the above

Accepted Answer

Cold, old oceanic crust is denser than the surrounding mantle, so it tends to sink back into the mantle at subduction zones where oceanic lithosphere converges with a continental or another oceanic plate. Therefore, it can be found along convergent plate boundaries near subduction zones.

Question 5

Oldest seafloor is found near midoceanic ridges and becomes progressively younger with increasing distance from the ridges.

Accepted Answer

The youngest seafloor is found near mid-ocean ridges, where new crust is formed by volcanic activity. As you move away from the ridges, the seafloor gets progressively older.

Question 6

Crust is neither created nor destroyed at this boundary.&#10;A) transform plate boundaries&#10;B) divergent plate boundaries&#10;C) spreading centers&#10;D) convergent plate boundaries

Accepted Answer

At transform plate boundaries, plates slide past each other horizontally. This movement does not involve the creation or destruction of crust, unlike at divergent (where crust is created) and convergent boundaries (where crust is destroyed).

Question 7

The East Africa Rift Zone is an area of:&#10;A) elongated collapse of continental crust&#10;B) crustal extension and thinning&#10;C) a possible new ocean basin&#10;D) all of the above

Accepted Answer

The East Africa Rift Zone is characterized by elongated collapse of continental crust, crustal extension and thinning, and a possible new ocean basin, making all of the above options correct.

Question 8

All are true about plate boundaries EXCEPT:&#10;A) distribution of active volcanoes occur on or near boundaries&#10;B) location of global earthquakes occur along boundaries&#10;C) life does not exist along boundaries&#10;D) mountain ridges are common

Accepted Answer

Life does exist along plate boundaries, such as in hydrothermal vent communities.

Question 9

Mid-ocean ridges are present in all ocean basins.

Accepted Answer

Mid-ocean ridges are underwater mountain ranges that run through the center of the ocean basins. They are present in all major ocean basins, making them a global feature.

Question 10

The area characterized by continental arcs and nearby deep sea trenches occurs along:&#10;A) ocean-continent convergent boundaries&#10;B) ocean-ocean convergent boundaries&#10;C) continent-continent convergent boundaries&#10;D) rift zones of divergent boundaries

Accepted Answer

Continental arcs and nearby deep sea trenches occur along ocean-continent convergent boundaries, where an oceanic plate is subducted beneath a continental plate. This process often leads to the formation of volcanic mountain chains on the continental plate and deep sea trenches in the adjacent ocean.

Question 11

The _____ Plate meets the Pacific Plate along California's San Andreas Fault.&#10;A) Nazca&#10;B) North American&#10;C) Juan de Fuca&#10;D) South American

Accepted Answer

The answer of The _____ Plate meets the Pacific Plate...

Question 12

The following statement is true with regard to the Atlantic Ocean:&#10;A) The deepest part of the Atlantic Ocean is found right at the center&#10;B) Observing the cross-section (side view) will show that the Atlantic Ocean's profile is shaped like a bowl with the deepest areas are at the center and gets shallower as you move toward the continents&#10;C) The mid-Atlantic oceanic ridge is a chain of volcanoes resulting from a converging plate boundary&#10;D) The oldest oceanic crust is found near continents

Accepted Answer

The answer of The following statement is true with regard...

Deck 30: Plates of the Lithosphere