Article: Ripple effect: here's what scientists have learned about the superquake that caused the disastrous Indian Ocean tsunami one year ago.

Critical Thinking

* Why is a tsunami warning system less necessary in the Atlantic Ocean than in the Pacific Ocean? (much less earthquake activity in the Atlantic)

* How can people in Asia be better defended against tsunamis? (build a better warning system, build towns away from the water, build houses on stilts)

National Science Education Standards

* Structure of the Earth system: plate tectonics

* Natural and human-induced hazards: earthquakes and tsunamis

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