4. Ask volunteers to compare and contrast continental drift, plate
tectonics, and sea floor spreading, or to show the relationships among
plate boundaries, earthquakes, and volcanoes.
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5. Invite students to build models to demonstrate the four types of
plate boundaries.
6. A group of students could create giant cardboard models of the
continental pieces by enlarging them to scale. They or another group
could perform a Drift Dance, moving in various patterns until the
pieces lined up more or less as they are today.
7. Ask the class: If earthquakes are only supposed to happen in the
vicinity of plate boundaries, why did the 1811 and 1812 New Madrid,
Missouri, earthquakes occur? (New Madrid is located on a failed rift
zone that tried to split North America apart.) Was it an isolated occur-
rence, or could the same thing happen in other such areas? (There may
be other such rift zones that have not yet been discovered.)
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