• The word volcano comes from Vulcan, the Roman god of fire and blacksmiths. Once, people believed the lava and ash spewed from Vulcan's forge.
 
•  Volcanic gases are poisonous and deadly. The gases that rise from magma often smell like rotten eggs, can sting the eyes and throat, and can eat through clothing—or even human flesh! 
 
• Not all lava is the same: A pahoehoe (pa-hoy-hoy) lava flow travels quickly and often forms smooth, ropy patterns, while an aa (ah-ah) lava flow moves slowly and hardens to form sharp chunks.