EOSC 114 Volcanoes UPDATED ACTUAL Questions and CORRECT Answers
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EOSC 114 Volcanoes
Institution
EOSC 114 Volcanoes
EOSC 114 Volcanoes UPDATED ACTUAL
Questions and CORRECT Answers
What correctly describes volcanism at a continental volcanic arc? - CORRECT
ANSWER- High Viscosity dacitic lavas and explosive volcanism
During the 1986 lake Nyos eruption, the most dangerous areas to be in were_____because the
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EOSC 114 Volcanoes UPDATED ACTUAL
Questions and CORRECT Answers
What correctly describes volcanism at a continental volcanic arc? - CORRECT
ANSWER✔✔- High Viscosity dacitic lavas and explosive volcanism
During the 1986 lake Nyos eruption, the most dangerous areas to be in were_____because the
gas was______? - CORRECT ANSWER✔✔- In valleys,denser than air
what magma type is produced by partial melting of the Earth's mantle? - CORRECT
ANSWER✔✔- Mafic
Fatalities from volcanic eruptions have increased steadily over the past 200 years because
_________. - CORRECT ANSWER✔✔- the world's population has increased and people are
living closer to 100% volcanoes.
True or False:Mount St. Helens is a composite volcano that can erupt magmas with the entire
possible range of silica contents. - CORRECT ANSWER✔✔- True
What type of volcanic landform is MOST commonly associated with Hawaiian mafic
volcanism? - CORRECT ANSWER✔✔- Shield Volcano
A high volcano explosivity index (VEI) generally corresponds with _________. - CORRECT
ANSWER✔✔- Long recurrence intervals
The type of magma most likely to cause a violent volcanic eruption is________. - CORRECT
ANSWER✔✔- high viscosity and relatively cool
True or False:All minerals have Si and O. - CORRECT ANSWER✔✔- False
What is NOT measured in volcano monitoring programs - CORRECT ANSWER✔✔-
temperature of the magma body at depth
, What was the volcanic hazard that caused the tragedy at Lake Nyos in Cameroon? -
CORRECT ANSWER✔✔- Co2 gas
Pyroclastic flows don't originate in _______. - CORRECT ANSWER✔✔- fall of ballistic
debris
A common example of a mafic volcanic landform is a ________. - CORRECT
ANSWER✔✔- Shield Volcano
A hazard NOT caused by volcanic ash and ash clouds is: - CORRECT ANSWER✔✔-
causing a tsunami when ash falls into the ocean
Most magma is generated by melting of pre-existing rock through _________. - CORRECT
ANSWER✔✔- decompression melting
The majority of the world's explosive volcanoes are found at: - CORRECT ANSWER✔✔-
Convergent plate boundaries
Which volcanic hazards is the LEAST hazardous to humans? - CORRECT ANSWER✔✔-
Lava
What is NOT a product of a volcanic eruption? - CORRECT ANSWER✔✔- intrusive
igneous rocks
The MOST LIKELY place to find an active subaerial volcano is ______. - CORRECT
ANSWER✔✔- Above a subduction zone
A magma erupting at a temperature of 600-800°C, with high silica content, high gas content,
and high viscosity will erupt as a/an _________. - CORRECT ANSWER✔✔- rhyolite
pyroclastic flow in a caldera
he explosivity of hot spot volcanism is dictated by ? - CORRECT ANSWER✔✔- the
composition of the overlying plate
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