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PBS
Nova: Hunt for the Supertwister
This activity will introduce you to the Fujita scale for rating tornado strength. You will then put your knowledge to use by observing photographs of tornado damage and assigning them a rating.
Science Struck
Science Struck: Causes and Effects of Hurricanes
Discusses the causes of hurricanes and their effects on a region, including storm surges, heavy winds, precipitation, and possible tornadoes.
NASA
Nasa Earth Observatory: The Color of El Nino
This article explains the effects El Nino has had on different climates and natural disasters throughout the world.
Mocomi & Anibrain Digital Technologies
Mocomi: What Is a Natural Disaster?
Learn the effects of natural disasters and the difference between natural disasters and man-made disasters. Also explores ten different natural disasters.