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Volcano Under the City
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Viewing Ideas
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Before Watching
Have students list and then share what they know about volcanoes. Where are
volcanoes found? How are they formed? Do all volcanoes give off the same type
of material? (Volcanoes emit lava, tephra or rock fragments, and gases;
these differ according to volcano type.)
Organize students into three groups. As students watch the program, have
each group take notes on one of the following areas: what scientists are trying
to measure and the instruments they used, the challenges and dangers
researchers faced, and past volcanic eruptions and the damage caused by
each.
After Watching
Have students share their notes. Make a chart on the board that includes
what scientists measured, what kind of technology they used, and what they
learned from their tests. (Scientists used seismographs to detect earthquake
distribution, employed satellite imaging to measure changes in land
deformation, took gas measurements to determine gas content and levels, and
obtained lava samples to better understand the dynamics of the volcano's
magma.) Include in the discussion the challenges and dangers researchers
faced, and the nature of earlier Nyiragongo eruptions.
Ask students how they would feel living near Nyiragongo. Why would they
stay? Why would they leave? What other forces of nature make some areas unsafe?
Have students compare the risk of living in an area where natural disasters
might occur and cause devastation and death versus taking risks such as smoking
or speeding in a car.
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