1. A linear region of land with many shallow earthquakes. There is little to no
ID: 153195 • Letter: 1
Question
1. A linear region of land with many shallow earthquakes. There is little to no active volcanism. Mountains are generally not present or only exist as gentle hills.
Select one:
a. Transform Boundary
b. Continent-Continent Convergent Boundary
c. Continent-Ocean Convergent Boundary
d. Ocean-Ocean Convergent Boundary
e. Divergent Boundary
2. Quakes and volcanic activity are continuously found along this mostly underwater boundary. The mountain range it creates is by far the longest on the planet.
Select one:
a. Transform Boundary
b. Continent-Continent Convergent Boundary
c. Continent-Ocean Convergent Boundary
d. Ocean-Ocean Convergent Boundary
e. Divergent Boundary
3. Shallow to deep earthquakes are found along this underwater boundary that parallels a deep trench. Island arcs are created from the volcanism created here.
Select one:
a. Transform Boundary
b. Continent-Continent Convergent Boundary
c. Continent-Ocean Convergent Boundary
d. Ocean-Ocean Convergent Boundary
e. Divergent Boundary
3. Shallow to deep earthquakes are found along this underwater boundary that parallels a deep trench. Island arcs are created from the volcanism created here.
Select one:
a. Transform Boundary
b. Continent-Continent Convergent Boundary
c. Continent-Ocean Convergent Boundary
d. Ocean-Ocean Convergent Boundary
e. Divergent Boundary
4. Continental arcs are created from the volcanism found here. Shallow to deep earthquakes occur along this underwater boundary that also parallels a deep trench.
Select one:
a. Transform Boundary
b. Continent-Continent Convergent Boundary
c. Continent-Ocean Convergent Boundary
d. Ocean-Ocean Convergent Boundary
e. Divergent Boundary
Explanation / Answer
1. Ans. b. Continent-Continent Convergent Boundary
If the two plates that meet at a convergent plate boundary both consist of continental crust, they will smash together and push upwards to create mountains. The activity at continent-continent convergences does not take place in the mantle, so there is no melting and therefore no volcanism.
2. Ans. a. Transform Boundary
As the plates rub against each other, huge stresses are set up that can cause portions of the rock to break, resulting in earthquakes. Places where these breaks occur are called faults. A well-known example of a transform plate boundary is the San Andreas Fault in California.
3. Ans. d. Ocean-Ocean Convergent Boundary
Two oceanic plates may collide. In this case, the older plate is denser. This plate subducts beneath the younger plate. As the subducting plate is pushed deeper into the mantle, it melts. The magma this creates rises and erupts. This forms a line of volcanoes, known as an island arc. Japan, Indonesia, the Philippine Islands, and the Aleutian Islands of Alaska are examples of island arcs.
4. Ans. c. Continent-Ocean Convergent Boundary
When oceanic crust converges with continental crust, the denser oceanic plate plunges beneath the continental plate. This process, called subduction, occurs at the oceanic trenches. The entire region is known as a subduction zone. Subduction zones have a lot of intense earthquakes and volcanic eruptions. The subducting plate causes melting in the mantle above the plate. The magma rises and erupts, creating volcanoes. These coastal volcanic mountains are found in a line above the subducting plate. The volcanoes are known as a continental arc.
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