EAR 106 EXAM 1 QUESTIONS WITH ACCURATE
ANSWERS RATED A+
What type of activity drives plate motion? - ANSWER Seafloor Spreading
Mountain Ranges do not sit on Earth's surface, but instead have a structure like a(n)
________________. - ANSWER Iceberg
What component of the mantle makes up most of the volume of Earth? - ANSWER
Peridotite
The East African Rift Zone was created by ______________, and and may be the early stage
of a future ocean. - ANSWER Continental Spreading
Hotspot volcanos are anchored in the ______________. - ANSWER Mantle
What type of rock comprises most of the ocean floor? - ANSWER Basalt
Most of the magmas that erupt in continental rift zones are ____________. - ANSWER
Rhyolite or Basalt
The High Cascades volcanoes in the Pacific Northwest, which lie inland from an oceanic
trench, formed from __________. - ANSWER An Active Subduction Zone
,What is the correct order of Earth's layers, from the center to the surface? - ANSWER
Core, mantle, crust
The elevation difference between the continental and oceanic crusts is explained by the
concept of _____. - ANSWER Buoyancy
The important discovery and confirmation of _____ made the hypothesis of continental
drift feasible. - ANSWER Seafloor Spreading
When two oceanic lithospheric plates collide, the result is usually _____. - ANSWER A
subduction
What evidence prompted Dutch mapmaker Abraham Ortelius to suggest in 1596 that
Africa and South America were once connected and had since moved apart? - ANSWER
The Similarity of the shapes of the coastlines
Tectonic plates move away from each other at _____ boundaries. - ANSWER a divergent
In Hawaii, the Mauna Loa and Kilauea volcanoes are part of a chain of extinct volcanoes,
which created a track of volcanic activity. These volcanoes are therefore examples of
_____. - ANSWER Hotspot Volcanoes
Acceleration in an earthquake is measured in terms of _____. - ANSWER Gravity
, What type of earthquake is most likely to be associated with the eastern United States? -
ANSWER Intraplate
A measure of the total energy expended during an earthquake is called the _____. -
ANSWER Moment magnitude
The Basin and Range of Nevada, Utah, and adjacent areas is an example of faults
associated with _____ boundaries. - ANSWER Divergent
The amount of movement on a fault, or _____, is related to the size of an earthquake. -
ANSWER Offset
What type of fault moves rocks on the upper side of a steeply inclined fault up and over
those below? - ANSWER Reverse
Choose the correct order of earthquakes ranked from greatest energy released to least
energy released. - ANSWER Chile (1960) - San Francisco (1906) - Long Island (1884)
During an earthquake with a magnitude of about 6 on the Richter scale, the shaking lasts
about ______. - ANSWER 10-15 Seconds
The first waves to arrive during an earthquake are the _____ waves. - ANSWER P
ANSWERS RATED A+
What type of activity drives plate motion? - ANSWER Seafloor Spreading
Mountain Ranges do not sit on Earth's surface, but instead have a structure like a(n)
________________. - ANSWER Iceberg
What component of the mantle makes up most of the volume of Earth? - ANSWER
Peridotite
The East African Rift Zone was created by ______________, and and may be the early stage
of a future ocean. - ANSWER Continental Spreading
Hotspot volcanos are anchored in the ______________. - ANSWER Mantle
What type of rock comprises most of the ocean floor? - ANSWER Basalt
Most of the magmas that erupt in continental rift zones are ____________. - ANSWER
Rhyolite or Basalt
The High Cascades volcanoes in the Pacific Northwest, which lie inland from an oceanic
trench, formed from __________. - ANSWER An Active Subduction Zone
,What is the correct order of Earth's layers, from the center to the surface? - ANSWER
Core, mantle, crust
The elevation difference between the continental and oceanic crusts is explained by the
concept of _____. - ANSWER Buoyancy
The important discovery and confirmation of _____ made the hypothesis of continental
drift feasible. - ANSWER Seafloor Spreading
When two oceanic lithospheric plates collide, the result is usually _____. - ANSWER A
subduction
What evidence prompted Dutch mapmaker Abraham Ortelius to suggest in 1596 that
Africa and South America were once connected and had since moved apart? - ANSWER
The Similarity of the shapes of the coastlines
Tectonic plates move away from each other at _____ boundaries. - ANSWER a divergent
In Hawaii, the Mauna Loa and Kilauea volcanoes are part of a chain of extinct volcanoes,
which created a track of volcanic activity. These volcanoes are therefore examples of
_____. - ANSWER Hotspot Volcanoes
Acceleration in an earthquake is measured in terms of _____. - ANSWER Gravity
, What type of earthquake is most likely to be associated with the eastern United States? -
ANSWER Intraplate
A measure of the total energy expended during an earthquake is called the _____. -
ANSWER Moment magnitude
The Basin and Range of Nevada, Utah, and adjacent areas is an example of faults
associated with _____ boundaries. - ANSWER Divergent
The amount of movement on a fault, or _____, is related to the size of an earthquake. -
ANSWER Offset
What type of fault moves rocks on the upper side of a steeply inclined fault up and over
those below? - ANSWER Reverse
Choose the correct order of earthquakes ranked from greatest energy released to least
energy released. - ANSWER Chile (1960) - San Francisco (1906) - Long Island (1884)
During an earthquake with a magnitude of about 6 on the Richter scale, the shaking lasts
about ______. - ANSWER 10-15 Seconds
The first waves to arrive during an earthquake are the _____ waves. - ANSWER P
