I Dynamic Earth 4. Volcanoes form over unusually hot centers in the interior of the earth, along separating plate boundaries, or near descending plates.
Earthquakes also occur along plate boundaries.
Both of these can have a significant impact upon human activities. Compare different types of earthquakes and discuss the economic effects of each. Illustrate how the Richter Scale classifies earthquakes. Explore the Alaskan economy before and after the 1964 earthquake.