What is a volcano? A weak spot in the crust where magma has come to the surface. EX:

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Presentation transcript:

What is a volcano? A weak spot in the crust where magma has come to the surface. EX:

What is volcanism? any phenomena associated with volcanic activity. EX: (next slide) What volcanic phenomena have you heard of?

What are some of the things that can happen during an explosive eruption ? Explosion breaks lava into fragments of different sizes. a. volcanic ash b. cinders c. bombs ombs.htm ombs.htm Pyroclastic flow: a mixture of hot gases, ash, cinders, and bombs.

What is pahoehoe? Lava that flows easily and hardens into a rippled surface. EX:

What is A’a? Flows slowly and hardens into rough chunks. EX: