Volcanic mudflows, composed of ash, debris, and water: 
1.occur only in arctic regions because snow supplies the water for mud. 
2.leave messes but rarely kill people because they flow slowly. 
3.are called nuée ardentes. 
4.have often resulted in damage and death to humans and their property. 
5.are extremely rare.

Which of the following is not a form of lava? 
1. Aa 
2.Andesite 
3.rhyolite 
4.Lapilli 
5.Pahoehoe

Lava of low viscosity: 
1. could logically build a shield cone. 
2.indicates an area has little potential for explosive eruptions. 
3.is logically basalt. 
4.has low silica content. 
5.all of the above are true.

Vesuvius erupted-a very violent explosion-in 79 A.D. and buried the residents of Pompeii in ash. On the basis of this information, which of the following would you least expect to find at Vesuvius? 
1. Basalt 
2.lapilli (cinders) 
3.Rhyolite 
4.welded tuff 
5.Ignimbrite.