Terms and Definitions
What is lava?
Lava is molten rock that erupts from a volcano and flows onto Earth's surface.
What is #1 called on the diagram?
Eruption/Ash Cloud
What type of volcano is #1?
Cinder Cone Volcano
Describe the movement of convergent boundaries.
Subduction. Destructive effect.
What are active volcanoes?
Active volcanoes have experienced some activity in the last 10,000 years.
What is magma?
Magma is molten rock beneath Earth’s surface.
What is #4 called on the diagram?
Vent
What type of volcano is #2?
Composite Volcano (Stratovolcano)
Describe the movement of divergent boundaries.
Spreading apart or pulling away. Constructive effect.
What are dormant volcanoes?
Dormant volcanoes have not erupted in the last 10,000 years but may erupt again in the future.
What is a magma chamber?
Magma chambers are hollows within a volcano where magma accumulates.
What is #3 called on the diagram?
Lava
What type of volcano is #3?
Shield Volcano
Which plate boundary does not have volcanic activity?
Transform boundaries.
What are extinct volcanoes?
Extinct volcanoes have not erupted in the last 10,000 years and are unlikely to erupt again.
What are craters?
Craters are the mouth of the volcano. Forceful explosions may blow out the tops of mountains to form craters.
What is #6 called on the diagram?
Magma Chamber
What type of volcano is #4?
Shield Volcano
What type of plate boundary is #6?
Transform.
True or False. Volcanoes can change classification from extinct to dormant.
True. If an extinct volcano is experiencing activity again, it can be classified as dormant.
What is a vent?
Vents are openings in Earth’s surface where volcanic materials escape.
What is #2 called on the diagram?
Crater
What type of volcano is #5?
Composite Volcano (Stratovolcano)
What type of plate boundary is #7?
Convergent.
What volcano went from being classified as extinct to being classified as dormant in 2006?
The Four-Peaked Mountain in Alaska.