Volcanic damage to jetliners is extremely rare (less than once per decade) because volcanic ash rarely
makes it above 19,000 meters (30,000 feet), where passenger jets fly.z Indicate whether the statement is true or false.
Q. 2 - Volcanic activity always results in a loss of biodiversity due to habitat destruction. Indicate whether the statement is true or false.
Q. 3 - Volcanic ash is able to supply all the nutrients that crops need. Indicate whether the statement is true or false.
Q. 4 - The Pacific Ring of Fire includes two-thirds of the world's active volcanoes. Indicate whether the statement is true or false.
Q. 5 -
Volcanoes that have a time between eruptions of 1,000 years or greater always have a Volcanic
Explosivity Index of 5 or greater. Indicate whether the statement is true or false.
Q. 6 -
Which of the following methods is NOT useful in forecasting the probability of a volcanic eruption?
a. swelling measured by tilt-meters or satellite interferometry
b. earthquakes measured by seismometers
c. changes in Earth's gravity field measured by gravimeters
d. changes in the composition of fumarole gas measured by a gas chromatograph
e. reversals in the local magnetic field measure by magnetometers
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