Here Comes the Eruption! (Grades 4-6)
Activity 5 is a simple review of the methods used to monitor
volcanoes and how the parameters change as an eruption becomes imminent.
Prior to an eruption, the number of earthquakes, tilt, elevation of the
summit of the volcano, amount of gas released, size of earthquakes, and
distance between points at the summit of the volcano increase. The
number of visitors probably increases. The depth of earthquakes decreases.
Activity 5. Here comes the eruption!
Name: _______________ Date: _______________
As an eruption becomes more likely, a volcano begins to change.
For each of the geologic factors listed on the left, use the space on the
right to tell if they will remain the same, increase, or decrease as the
volcano gets ready to erupt.
a. number of earthquakes _______________
b. tilt _______________
c. elevation of the summit
of the volcano _______________
d. amount of gas released _______________
e. magnitude of earthquakes _______________
f. distance between points
at the summit of the volcano _______________
g. number of visitors to
Hawaii Volcanoes National Park _______________
h. depth of earthquakes _______________