NASA
Nasa Earth Observatory: Natural Hazards: Volcanoes and Earthquakes
NASA's Earth Observatory offers photos showing locations of volcanic activity and earthquakes. Click on thumbnails to view large images and read about the causes and effects of these natural hazards.
Tramline
Tramline: Tornado Field Trip
In this virtual field trip students learn about the formation of tornadoes. Students also visit websites where they can research various types of information about tornadoes.