ESS 106 FINAL EXAM QUESTIONS WITH
ANSWERS 100% PASS
Which of the following is not a way that volcanologists measure deformation of a
volcano?
a) Measuring changes in line length between points on and off of the volcano.
b) Measuring changes in the slope of the ground surface on the volcano.
c) Measuring volcanic gas emissions from the crater.
d) Tracking the movement of GPS stations on the volcano. - ANSWER c
Potential volcanic activity is assessed by:
a) ground deformation
b) gas emission
c) observations of wildlife
d) earthquakes
e) a, b, and d - ANSWER e
For Mt. St. Helens since 1980, what has been the most reliable warning of eruptive
behavior?
, a) Increasing numbers of earthquakes.
b) Decreasing depth of earthquakes.
c) No warning, because there have been no eruptions since 1980.
d) No warning, therefore the eruptions have occurred unexpectedly.
e) Unknown, as no efforts have been made to monitor this. - ANSWER b
Why are lahars so dangerous?
a) They can be triggered by many things and can travel rapidly.
b) They are composed of hot gas and can move very quickly over ridges and hills.
c) They are composed of hot blocks which are themselves explosive.
d) They occur in all types of volcanoes - ANSWER a
What is the most effective way to survive a lahar?
a) Get in your car and drive quickly downstream.
b) Shut all of the windows and stay in the lowest level of your house.
c) Get to high ground as soon as you know it's coming.
d) Build your house on stilts.
e) Get in your whitewater kayak and prepare for a wild ride - ANSWER c
, Which of the following does not contribute to instability and collapse of stratovolcanoes
such as Mt.Rainier:
a) thick, heavy lava flow layers
b) thin, steeply tilted lava flow layers
c) hydrothermal alteration
d) rubble layers between flows - ANSWER a
Should a lahar occur on Mt. Rainier, local inhabitants will have:
a) about 15 minutes to two hours to evacuate.
b) about six to twelve hours to evacuate.
c) no cause for alarm, as there is no history of far-reaching lahars at Rainier.
d) to prepare for a major eruption. - ANSWER a
The threat from lahars on Mt. Rainier is made worse by the fact that
a) the mountain has more glacial ice than other Cascade volcanoes.
b) the mountain has less glacial ice than other Cascade volcanoes.
c) the mountain has colder glacial ice than other Cascade volcanoes.
d) the mountain has warmer glacial ice than other Cascade volcanoes. - ANSWER a
ANSWERS 100% PASS
Which of the following is not a way that volcanologists measure deformation of a
volcano?
a) Measuring changes in line length between points on and off of the volcano.
b) Measuring changes in the slope of the ground surface on the volcano.
c) Measuring volcanic gas emissions from the crater.
d) Tracking the movement of GPS stations on the volcano. - ANSWER c
Potential volcanic activity is assessed by:
a) ground deformation
b) gas emission
c) observations of wildlife
d) earthquakes
e) a, b, and d - ANSWER e
For Mt. St. Helens since 1980, what has been the most reliable warning of eruptive
behavior?
, a) Increasing numbers of earthquakes.
b) Decreasing depth of earthquakes.
c) No warning, because there have been no eruptions since 1980.
d) No warning, therefore the eruptions have occurred unexpectedly.
e) Unknown, as no efforts have been made to monitor this. - ANSWER b
Why are lahars so dangerous?
a) They can be triggered by many things and can travel rapidly.
b) They are composed of hot gas and can move very quickly over ridges and hills.
c) They are composed of hot blocks which are themselves explosive.
d) They occur in all types of volcanoes - ANSWER a
What is the most effective way to survive a lahar?
a) Get in your car and drive quickly downstream.
b) Shut all of the windows and stay in the lowest level of your house.
c) Get to high ground as soon as you know it's coming.
d) Build your house on stilts.
e) Get in your whitewater kayak and prepare for a wild ride - ANSWER c
, Which of the following does not contribute to instability and collapse of stratovolcanoes
such as Mt.Rainier:
a) thick, heavy lava flow layers
b) thin, steeply tilted lava flow layers
c) hydrothermal alteration
d) rubble layers between flows - ANSWER a
Should a lahar occur on Mt. Rainier, local inhabitants will have:
a) about 15 minutes to two hours to evacuate.
b) about six to twelve hours to evacuate.
c) no cause for alarm, as there is no history of far-reaching lahars at Rainier.
d) to prepare for a major eruption. - ANSWER a
The threat from lahars on Mt. Rainier is made worse by the fact that
a) the mountain has more glacial ice than other Cascade volcanoes.
b) the mountain has less glacial ice than other Cascade volcanoes.
c) the mountain has colder glacial ice than other Cascade volcanoes.
d) the mountain has warmer glacial ice than other Cascade volcanoes. - ANSWER a
