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WorksheetsEarthquakes & Volcanoes
Total questions: 24
Worksheet time: 12mins
A __________ is a break in the crust along which blocks of rock slip past one another during an earthquake .
subduction zone
fault
rift
divergent boundary
The __________ is the location of an earthquake center below the surface and inside the crust.
seismic zone
epicenter
focus
locus
Seismic waves are mechanical waves--waves that need a medium to travel through. What is the medium for seismic (earthquake) waves?
solid inner core material
molten outer core material
weakly solid mantle rock
solid crustal rock
We know the Earth has layers from the study of the behavior of seismic waves called seismology. Which type of wave is blocked by the Earth's liquid outer core?
Surface waves
P or primary waves
S or secondary Waves
Which seismic waves travels fastest through the Earth, vibrates by compression and expansion of earthen material, and travels through solid and liquid layers?
Surface waves
P waves
S Waves
An earthquake occurs in New Zealand. Which wave(s) could theoretically be detected by a seismic monitoring station in Spain on the exact opposite side of the Earth?
both P waves and Surface waves
both S waves and Surface waves
Only S waves
Only Surface waves
The most destructive seismic waves are __________.
Surface waves
Primary or P waves
Secondary or S waves
The distance of the epicenter of a quake from a seismic monitoring station can be determined by __________.
the station's longitude
the time interval between P and S waves
the maximum amplitude of the S waves
the station's latitude
The magnitude or strength of an earthquake is rated on the __________.
Beaufort scale
Saffir-Simpson scale
Fujita scale
Richter scale
The Richter scale has a practical upper limit of about __________.
5.0
10.0
50.0
100.0
Earthquakes occur __________.
only near tectonic plate boundaries
along any fracture in the Earth's crust, near or far from plate boundaries
only along faults distant from plate boundaries
only underneath continental crust
Seismic waves represent __________.
the net displacement of the entire crust
the transfer of released stress energy throughout Earth's interior
the release of Earth's internal heat
the magnetic field of the Earth
What type of volcano is shown in the photo?
cinder cone
composite volcano
shield volcano
stratovolcano
Crater Lake is an example of __________.
a shield volcano
a caldera
a cinder cone
a composite volcano(stratovolcano)
Which gas is NOT a typical volatile compound generated in a volcanic eruption?
oxygen
water vapor
carbon dioxide
hydrogen sulfide/sulfur dioxide
A __________ is a destructive mudflow produced by volcano.
lava stream
nuee ardente
lahar
pyroclastic flow
Silica is all these EXCEPT__________.
volcanic gas
a quartz-like component of rock
silicon dioxide
a common component in sand
The most explosive type of volcano has magma with _________.
low silica and low gas content
low silica and high gas content
high silica and high gas content
high silica and low gas content
The danger of a pyroclastic flow to humans is __________.
the suffocating gases
its fast speed
its high temperature
disruption of Wi-Fi
The mystery surrounding Mount St. Helens is __________.
the origin of its name
its location in the Pacific Northwest
the source of its magma
its 1980 eruption
Viscosity is a measure of a fluid's resistance to flow. A shield volcano has its broad dome shape because the magma has __________.
low viscosity from high silica content
low viscosity from low silica content
high viscosity from low silica content
high viscosity from high silica content
A cinder cone could be considered a land form produced by __________ because of gases and material ejected into the air.
volcanic and fluvial processes
volcanic and impact processes
volcanic and aeolian processes
aeolian and impact processes
Volcanic arcs like the Aleutian Islands or Andes mountains are most often found near __________.
transform boundaries
divergent boundaries
convergent boundaries
Volcanic activity in the form of mid-ocean ridges and rift valleys are associated with __________.
transform boundaries
divergent boundaries
convergent boundaries
