How they form
area where one tectonic plate is moving under another
What is a subduction zone?
smallest type of volcano, usually erupts only once.
What is a cinder cone volcano?
Lava that pours out quickly forming jagged pieces with a rough surface
What is A'a lava?
Resistance to flow
What is viscosity?
Walls of ocean water created from volcanoes and earthquakes
What are tsunamis?
This happens to solid rock at high temperatures when either water is added or there is a decrease in pressure
What is magma formation?
This is the largest type of volcano with gently sloping sides
What is a shield volcano?
Lava that flows smoothly and looks like ribbon
What is Pahoehoe?
Volcanoes that have not erupted in the recent geologic era and are not expected to ever erupt again
What is an extinct volcano?
Volcanic energy used to heat homes
What is geothermal energy?
Mountain chains at divergent boundaries - e.g. in the Mid-Atlantic
What are mid-ocean ridges?
This is the most explosive type of volcano
What is a stratovolcano?
What is an explosive eruption?
Volcanoes that are not currently erupting but have erupted at some point in the recent geologic past
What are dormant volcanoes?
Abrasive rock, used in soaps and face scrubs
What is pumice?
Subduction zones, spreading centers, hotspots
What are places where volcanoes form?
This volcano has alternating layers of cooled lava and ash and cinders
What is a composite volcano?
An extremely hot current of gas and rock that erupts from a volcano
What is a pyroclastic flow?
Volcanoes that are in the process of erupting
What is an active volcano?
long term effects of volcanic eruption
What are soil rejuvenation, formation of new land, climate effects, building materials? (Any one or two is correct!)
Process where magma rises inside a volcano but does not erupt
What is intrusion?
Where shield volcanoes usually form
What are hot spots?
Rivers of mud that flow when volcanic ash mixes with snow or rain
What are lahars?
The difference between magma and lava
What is intrusive vs extrusive (or inside the Earth vs outside the Earth)?
Volcanic material that can create liquid cement in the lungs and scratch the surface of eyes
What is volcanic ash?