Vocabulary
Past eruptions
100
What is a crater?
The main, central vent on the top of the volcano.
100
Which famous eruption occurred in May of 1980?
Mt. St. Helens
200
What is the magma chamber?
Pocket that holds magma underground.
300
What is the Ring of Fire?
A chain of volcanoes that surrounds the Pacific Plate.
400
Describe how a caldera forms?
The volcano caves in on itself.
500
What is an intrusion?
Igneous rock that forms in the ground.
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