Volcanoes 1
A vent or fissure in the Earth’s surface that allows gas, molten rock, and heat to be released is called a
volcano
The smallest, most dangerous, pyroclastic material is
volcanic ash
The rock section of earth on either side of a fault line is called a
fault block
In a convergent plate boundary, what kind of fault would you see?
reverse fault
The Hawaiian Islands are an island chain that results from a
Hot spot
In a volcanic eruption, magma can erupt as lava or
pyroclastic material
About 75% of the world’s active volcanoes occur in what region?
the Ring of Fire
The strength of an earthquake is measured using what scale?
Richter Scale
A strike-slip fault would most likely be found at what kind of plate boundary?
transform
List 2 events that can cause a tsunami
earthquakes, volcanic eruption, asteroid impact
The most common type of eruptions on Earth are __________ eruptions.
A volcano that is no longer connected to a magma reservoir is classified as what kind of volcano?
extinct
The point where the energy of an earthquake is first released is called the
focus
point on the ground directly above where the energy was released is called the ___________
epicenter
The collapsed top of a volcanic mountain is known as a
Magma that is very thick and sticky has a high __________ content.
silica
The large volcanoes formed by long-term, non-explosive eruptions are
shield volcanoes
The type of rock deformation that leads to earthquakes is known as
elastic deformation
What can each kind of wave travel through:
P Wave
S Wave
P Wave: solid, liquid, gas
S Wave: only solids
The energy wave that moves side-to-side is a(n)
S wave
The volcano type that can alter the world’s climate is the __________ volcano.
composite or strato
The high viscosity, stiff lave that moves slowly and gives jagged sharp edges as it cools is
aa lava
North Carolina does not have a “zero” earthquake hazard because of earthquake zones in
all our neighboring states
The sudden return of deformed rock to its undeformed shape, leading to earthquakes, is known as
elastic rebound
An earthquake must have a power (Richter value) of at least _____ to trigger a tsunami.
6.7