Volcano Pimple
Molten rock under the earth's surface
Magma
Which of the following statements about volcanoes is FALSE?
A. A volcano is cone-shaped mountain or hill which usually has a crater or depression at the top.
B. Forms around a vent in the earth’s crust though which lava, steam, and ash are expelled
C. Can erupt continuously or at irregular intervals
D. No statements are false. All are true about volcanoes.
D. No statements are false. All are true about volcanoes.
What are the two types of plate boundaries that volcanoes can be formed at?
Divergent & Convergent
Middle
Which volcano does not erupt explosively?
Shield
Circular basin or depression
Crater
Which type of volcano has steep sides, throws blobs of lava in the air that fall as cinders, and is built over a short period of time?
What two geographical features are formed at divergent plate boundaries?
Rift Valley
Mid-Ocean Ridge
True or false: There is a new Hawaiian Island that is forming from underwater volcanoes/hotspots that hasn't broken through the surface of the ocean yet.
True
Volcanoes form around a _____________ in the earth's crust through which lava, steam, and ash are expelled (thrown).
Vent
Another way that magma can reach the surface
Secondary Vent
Which type of volcano has sides that are symmetrical (similar) in size, and are built by alternating layers of lava flows, volcanic ash, cinders, and bombs? They can also create explosive eruptions.
Composite
What is ONE of the scenarios that cause volcanoes to occur in a convergent plate boundary? (Use the words continental plate and/or oceanic plate in your answer).
Mrs. Crail will tell you if you are correct or not.
What is a very active volcanic region that we also mentioned in our earthquake unit.
The Ring of Fire
Which type of volcano has the MOST explosive eruption?
Composite
A fast moving current of hot gas and rock that moves away from a volcano
Pyroclastic Flow
Which type of volcano looks like a warrior’s shield lying on the ground and is formed by thick lava flows that flow slowly, not explosively. These are also the largest type of volcano.
shield volcano
What is created when two oceanic boundaries converge (and one subducts)? Volcanoes can occur here.
As for the Hawaiian Islands, only the island sitting over a __________________ is increasing in size.
Hotspot
Which volcanic feature is small pieces of pulvarized rock, minerals, and volcanic glass created during an eruption?
Ash cloud
The weak point in the earth's crust where hot magma rises from the magma chamber and reaches the surface.
Main Vent
A large basin-like (bowl) depression resulting from the explosion or collapse of the center of a volcano is a….?
Caldera
What is ONE of the scenarios of convergent plate boundaries that would create a volcano. (Use continental plates and/or oceanic plates in your answer)
Mrs. Crail will tell you if you are correct or not.
Explain the process of what happens when a plate subducts.
The plate melts, rises, and comes back through the vent in the Earth's crust as a volcano.
COMPOSITE