A mountain that forms in Earth's crust when molten material, or magma, reaches the surface.
What is a Volcano
100
A major belt of volcanoes.
What is the Ring of Fire.
100
Magma that is low in silica will produce what kind of eruption?
What is a quiet eruption.
100
A pocket of magma below the surface.
What is a magma chamber.
100
The hole left when a volcano collapses.
What is a caldera.
200
Molten mixture of rock-forming substances, gases, and water from the mantle
What is magma
200
A boundary that is moving apart.
What is a diverging boundary.
200
Magma that is high in silica will produce what type of eruption.
What is an explosive eruption
200
Magma moves upward through a long tube that extends from Earth's crust up through the top of the volcano, connecting the magma chamber to Earth's surface.
What is a pipe
200
Explosive volcanoes that build up around the vent in a steep, cone-shaped hill or small mountain.
What is a cinder cone
300
When magma reaches the surface it is called.
What is lava.
300
A boundary that is coming together or colliding.
What is converging boundary.
300
A material found in magma that forms from the elements oxygen and silicon.
What is silica
300
Molten rock and gas leave the volcano through an opening called...
What is a vent
300
An alternate between explosive and quiet eruptions build up and form a hill.
What is a composite volcano.
400
Volcanic belts form along the boundaries of Earth's what?
What is Earth's plate boundaries.
400
A string of islands created from volcanoes.
What is an island arc.
400
The mixture of hot gases, ash, cinders, and bombs that flow down the sides of a volcano when it erupts explosively.
What is pyroclastic flow.
400
The spread of lava as it pours out of a vent.
What is lava flow.
400
Lava flowing slowly and builds a wide, gentle sloping mountain called..
What is shield volcano.
500
An area where material from deep within Earth's mantle rises through the crust and melts to form magma.
What is a hot spot
500
A plate that sinks below another plate is what type of boundary?
What is subducting boundary.
500
What are the three stages of volcanic activity and what do they each mean?
What is dormant=sleeping, extinct=dead, active=alive
500
A bowl-shaped area that may form at the top of a volcano around the central vent.
What is a crater.
500
Forms when magma hardens in a volcano's pipe and the surrounding rock later wears away. Looks like a tooth.