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Volcano Test

6th grade science-Volcanos, Earthquakes

What are the three (3) types of volcanoes? Shield, Cinder Cone, and Composite
What are the three (3) types of lava flows? Pahoehoe, Aa, and Pyroclastic flow
A _______ volcano is a wide gently sloping mountain formed by thin layers of lava pouring out of the vent and hardening on other layers. Shield Volcano
The point where magma leaves the volcano is the _____. vent
The narrow tube where magma rises to the surface is called the ______. pipe
_____ is magma that reaches the surface. lava
A river of lava that pours down the volcano is the ____ ____. lava flow
The place where magma is collected is the ____ ____. magma chamber
This type of volcano is formed from lava flows alternating with eruptions of cinder, ash, and bombs- they are tall and cone shaped.... composite volcanoes
_____ ______ volcanoes are steep slope cone shaped and formed from thick lava with ash cinders and bombs. Cinder cone
______ is a fast moving hot lava that looks like rope-like coils or a solid mass of wrinkles. Pahoehoe
____ is a cooler, slower moving lava. When it hardens, it forms a rough surface with jagged chunks. Aa
_____ _____ occurs in an explosive eruption and throws out ash cinders and bombs. Pyroclastic flow
Hot molten material made of rock, dissolved gasses and water is known as ____. magma
The bowl-shaped area at the vent of the volcano is the ______. crater
Magma forces its way out of the side of the volcano from the ____ ____. side vent
hotspot an area where magma burns through the crust like a blow torch
geyser a jet of very hot water that shoots up out of the ground
extinct a volcano that will never erupt again
caldera a large craterthat is produced when a volcano empties its magma chamber
ring of fire a chain of volcanoes around the Pacific plate
dormant a 'sleeping' volcano
explosive type of eruption that produces a pyroclastic flow
silica combinations of oxygen and silicon
hot spring a pool of water that is heated up by magma
active a volcano that is currently erupting
quiet eruption that produces two(2) types of lava
volcanic neck what forms when magma in a volcano's pipe cools off
batholith what is formed when a volcano's magma chamber cools off
How were the Hawaiian Islands formed? shield volcanoes rising from a hotspot on the ocean floor caused the Hawaiian Islands to form.
Created by: 1275063203