Volcano Formation
Yes or No.
Do volcanoes form ONLY along faults, or places where tectonic plates meet?
No. They may also form over hot spots, in the middle of tectonic plates.
What is magma?
(Answers may vary)
Molten rock inside a volcano/Earth's surface.
What type of volcano has steep sides that form when pieces of lava fall around the vent?
Cinder-Cone Volcano
This famous volcano erupted in 1980 in the state of Washington.
Mount St. Helens
These mountains form along Earth's moving plates AND at hot spots in Earth's curst.
Volcanoes
What happens to lava over time, after it has come out of a volcano?
It cools and hardens. Cooling lava may build up and cause a mountain to form. It creates land (i.e., Hawaiian Islands).
What is lava?
(Answers may vary)
Magma once it reaches the Earth's surface/outside a volcano.
This type of volcano is made up of layers of both lava and ash.
Composite Volcano
Is Hawaii an active or dormant volcano?
Active.
(It sits on top of a hotspot in the middle of a tectonic plate and is still growing in size)
What happens when gas pressure rises within thick lava that is clogged inside of a volcano?
An explosive eruption occurs, or it erupts.
What are hardened pieces of lava called?
Ash
What is the cuplike shape that forms around the vent of a volcano?
Crater
This volcano is wide and flat. (hint: Captain America)
Shield Volcano
Is the island of Kauai an active or dormant volcano?
Dormant.
(It not longer sits on top of a hot spot)
This type of volcano can release lava in more than one opening (not just through the top).
Shield Volcano
True or False.
Volcanic eruptions can cause land to change suddenly.
True.
What is a dormant volcano?
A volcano that no longer erupts.
This type of volcano has explosive eruptions.
Cinder-Cone Volcano
Which volcano is the world's largest volcano? Where is it located?
Mauna Loa. On the island of Hawaii.
What is an active volcano?
What three common things are forced out of a volcano during an eruption?
Gases, melted rock, and pieces of rock
What is the central opening in a volcano called?
Vent
This type of volcano forms along the edges of spreading plates. (hint: at the faults)
Rift Volcano
What is the name of the volcano that destroyed the Roman city of Pompeii in the year A.D. 79?
Mount Vesuvius
This type of volcano has BOTH quiet periods of gentle lava flow AND explosive eruptions.
Composite Volcano