Assume you live near Mount St. Helens and the volcano is going through an explosive
eruption. Explain the effect pyroclastic materials would have on your home.
North American glaciations used to be described in four episodes. However, two of
those episode names, the Kansan and Nebraskan, are no longer used. What evidence did
scientists use to redefine the glacial history on the North American continent?
On January 12, 2010, the country of Haiti was rocked by a violent M 7.0 earthquake.
This quake caused widespread devastation and resulted in the death of over 300,000
people. A month later, an M 8.8 earthquake rocked central Chile, where over 80 percent
of the country's population was concentrated. However, only 525 people were reported
dead for this disaster. Why would Chile's earthquake, with a higher magnitude, have a
lower death toll than Haiti's earthquake?