1. Compare the Seismology and Plate Boundary Maps What are your initial observations about the geographic pattern of earthquakes?
a. Earthquakes seem to occur on nearly all plate boundaries.
b. Earthquakes occur only on a few plate boundaries.
c. Earthquakes do not occur on very many plate boundaries.
d. There is no apparent relationship between plate boundaries and earthquakes
2. Compare the Seismology and Plate Boundary Maps Why do you think there are so many shallow earthquakes clustered in southern Europe?
a. There must be a plate boundary here and the plate that contains the Mediterranean Sea and Africa is pushing into Southern Europe.
b. Most likely, Europe is moving away from Africa, causing a tear in the Earth’s crust.
c. No answer text provided.
3. Compare the Seismology and Plate Boundary Maps In some areas there seems to be a dense progression from very shallow to very deep earthquakes. Which of the following represents some of these areas?
a. Western coastline of South America, the Aleutiian Islands of Alaska, the east coastline of Japan, the western coastline of Sumatra
b. Down the middle of the Atlantic Ocean, the west coastline of Japan, the west coastline of California
c. The coastline of Antarctica, the northern coastline of Canada, the northern coastline of Russia, the area surrounding the United Kingdom
d. The west coastline of Africa, the east coastline of South America, the east coastline of North America
4. Compare the Seismology and Plate Boundary Maps
1-4. What type of process do you think is occurring at the locations you just identified?
a. A convergent boundary with a subduction zone, where one tectonic plate is sliding deep under another plate; this creates a narrow zone of shallow to deep earthquakes.
b. A divergent boundary where two plates are pulling away from each other[ as magma rises between the two plates, it creates a narrow zone of shallow to deep earthquakes.
c. A transform boundary where two tectonic plates are sliding past each other; these fractures extend incredibly deep into the mantle.
d. No answer
5. Compare the Seismology and Plate Boundary Maps.
1-5. The Seismology Map also shows some very long strings of relatively faint, shallow earthquakes, such as the string running down the middle of the Atlantic Ocean. What type of process do you think is occurring along these strings?
a. A divergent boundary – two plates are slowly pulling apart
b. Transform boundary – two plates are sliding passed each other.
c. Convergent boundary with a subduction zone.
d. no answer
6. Compare the Seismology and Plate Boundary Maps.
1-6. Some scientists have suggested that the area off the coast of Washington and Oregon represent a situation where two converging tectonic plates are locked together: strain is building which will eventually result in a series of major earthquakes. What evidence do you see on the Seismology Map that might support this idea?
a. There are very few earthquakes at this location.
b. There are numerous earthquakes at this location.
c. No answer
7. Compare the Volcanology and Plate Boundary Maps.
2-1. What are your initial observations about the geographic pattern of volcanoes? More than on answer
a.Convergent boundaries where an ocean plate collides with a continental plate (example: the Nazca Plate and South America) has many volcanoes
b. Convergent boundaries where 2 ocean plates come together (example: in the Pacific Ocean – Japan & Philippines) there are many volcanoes.
c. Transverse boundaries where 2 plates slide past each other (example: California where Pacific Plate slides past the North American Plate) there are many volcanoes
d. Convergent boundaries where two continental plates converge (example: India and Asia) have many volcanoes.
8. Compare the Volcanology and Plate Boundary Maps.
2-2. In the interior of Africa, near its east coast, there seems to be a string of volcanoes. What type of process do you think is occurring there?
a. Divergent boundary – the African crust is separating into two pieces.
b. Convergence of 2 continental plates.
c. Transform boundary where two portions of Africa are sliding past each other.
d. No answer
9. Compare the Volcanology and Plate Boundary Maps.
2-3. In general, which category of plate boundary shows the most dangerous concentration of volcanic activity?
a. Convergent ocean-continent or convergent ocean-ocean boundaries with subduction zones.
b. Convergent continent-continent
c. Divergent ocean boundaries
d. Divergent areas in the middle of continents.
10. Compare the Volcanology and Plate Boundary Maps.
2-4. Compare the Seismology and Volcanology Maps. Do you remember the long strings of faint shallow earthquakes? (Look especially at the string running down the middle of the Atlantic Ocean – this area is called the Mid-Atlantic Ridge) This is a divergent boundary, so why don’t we see a string of volcanoes along with the string of earthquakes?
a. Most of the volcanoes along the Mid-Atlantic Ridge are deep under water, except for areas like Iceland and the Azore Islands where the volcanoes are large enough they’ve grown above the surface of the ocean.
b. There are no volcanoes here
c. Since the volcanoes erupt under water, they cool off and are quickly extinguished.
d. No answer
11. Compare the Volcanology and Plate Boundary Maps.
2-6. The coastal area around the Pacific Ocean basin is often called “The Ring of Fire.” Why do you think this might be a good moniker?
a. Because of all the oceanic plate convergence boundaries and subduction zones, strings of volcanoes surround much of the Pacific Ocean
b. The “Pacific Rim of Fire” refers to all the volcanoes surrounding the Pacific Ocean because of all the divergent boundaries surrounding the Pacific Ocean.
c. Volcanoes start numerous wildfires in this region.
d. No answer
12. 3-3. Based on the separation times of the various continents, which of the following is the best narrative that describes how the Atlantic Ocean formed (which continents separated first, second, third, etc.).
a. Africa and North America separated first, followed by South America and Africa, then Greenland and North America, and finally Greenland and Europe
b. South America and Africa separated first, followed by North America and Africa, then Europe and North America, and finally Greenland and North America/Europe
c. Greenland and Europe separated first, followed by Greenland and North America, Africa and North America, and finally South America and Africa
d. No answer
13. Compare the Geochronology and Plate Boundary Maps.
3-4 Why don’t we find any part of today’s ocean basins that are older than 180 million years?
a. Old plates are recycled in subduction zones.
b. They just haven’t been found yet.
c. Old ocean plates are destroyed by volcanic eruptions.
d. They are buried under hundreds of feet of sediments
14. Compare the Geochronology and Plate Boundary Maps.
3-5. Compare the Geochronology and Seismology Maps. In general, why are strings of shallow earthquakes more likely to occur in the youngest areas of the seafloor?
a. The strings of shallow earthquakes mark divergent boundaries where brand new ocean crust is created.
b. The strings of shallow earthquakes represent transform boundaries where new ocean crust is created.
c. The strings of shallow earthquakes represent convergent boundaries where new ocean crust is created.
d. No answer
15. Compare the Geochronology and Plate Boundary Maps.
3-6. What type of igneous rock comprises the seafloor?
a. Basalt
b. Rhyolite
c. Granite
d. Andesite
16.Compare the Geochronology and Plate Boundary Maps.
3-7. What type of igneous rock comprises the core of continents?
a. Granite
b. Basalt
c Rhyolite
d. Andesite
17. Compare the Geography and Plate Boundary Maps.
4-1. What are your initial observations about geographic location and pattern of the highest mountains and deepest ocean trenches?
a. They most often occur near convergent boundaries.
b. They most often occur near divergent boundaries.
c. They most often occur near transform boundaries.
d. No answer
18. Compare the Geography and Plate Boundary Maps.
4-2. On the Geography Map, note that the light blue areas adjacent to the continents are the shallow waters over the continental shelves. Besides these shelves, which tend to be shallower, the very youngest or the older seafloor?
a. The very youngest
b. The older Seafloor
c. No answer
19. Compare the Geography and Plate Boundary Maps.
4-3. Which continent has the fewest high mountains?
a. Australia
b. North America
c. South America
d. Eurasia
e. Africa
f. Antartica
20. Compare the Geography and Plate Boundary Maps.
4-4. Which geographic area has the very highest mountains?
a. Eurasia
b. North America
c. South America Antartica
d. Antartica
e. Africa
