Volcanic Activity
What is an makes a volcano "active"?
If it has recently erupted or currently erupting.
A volcano that forms from blobs of lava ejecting from a single vent at the top.
Cinder Volcano
What is the substance that flows out of a volcano called?
Lava
Why do some volcanoes ooze lava over time?
The lava is thin.
What is a volcano called if it hasn't erupted for long time?
Dormant
Volcanoes formed by thick lava that hardens right around the vent.
Lava Domes
What is the difference between magma and lava?
Magma is underground, it is only called lava when it flows from a volcano on Earth's surface.
What will spew from a volcano when it explodes?
Lava and ash
What is it called when a scientists decides a volcano won't erupt again?
Extinct
What is a shield volcano?
It forms layers of lava shaped like a shield.
What happens to lava once it cools?
It turns to igneous rock.
How many volcanoes are erupting at any given time?
20
What type of plate boundary can form a volcano?
Convergent and Divergent (either is considered correct)
A volcano that can grow up to 8,000 ft.
Composite Volcano
How is magma formed?
Rock below the surface becomes so hot it becomes molten or liquid.
What causes a volcano to erupt?
Thicker lava blocks vents, causing high pressure that builds up over time.