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 rese
