Along divergent boundaries like the Mid-Atlantic Ridge __________ are common, but restricted to a narrow zone close to the ridge, and consistently at less than 30 km depth which is not considered very deep.
Shallow earthquakes are also common along __________ faults, such as the San Andreas Fault in California.
Along subduction zones at __________ boundaries, however, earthquakes are very abundant, and they are increasingly deep on the landward side of the subduction zone.
Stronger earthquakes are more likely to occur along active __________.
Stronger earthquakes are more common at __________ and __________ ​plate boundaries.
Volcanoes occur at __________ plate boundaries were subducting oceanic crust is melted. This magma rises through the crust to form volcanic arcs and volcanic island arcs.
Volcanoes also occur at __________ plate boundaries where upwelling magma pushes between plates (rift zones) as the plates move apart.
The __________ is the most seismically and volcanically active zone in the world.
A volcanic __________ is an area in the mantle from which heat rises in the form of a thermal plume from deep within the Earth.
Which of the following is an example of a geologic hot spot?
Which geologic features is most likely responsible for the formation of these volcanoes?
Which of the following best explains the formation of the Hawaiian islands located in the middle of the Pacific ocean basin?
Which of the following BEST explains why there are some major active volcanoes such as, Kilauea and Mauna Loa in the middle of the Pacific plate far from any tectonic plate boundaries?
According to the map above which of the following BEST explains why the location of many volcanoes around the world occur along the Pacific Ring of Fire?
Which of the following best explains the age of the Hawaiian islands?
Which of the following best explains the location of most major volcanoes around the world?
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