Pillow lava
Lava with a high viscosity
A shield volcano
A large depression that forms when the magma chamber partially empties is a
A dormant volcano
Where are volcanoes most likely to form?
Which of these would you expect to see during a non-explosive eruption?
If the water content of magma is high,
Which type of lava flows most like dripping wax?
Cool, stiff lava that forms jumbled heaps of sharp chunks near the vent is called
Pyroclastic material forms when
The three main types of volcanoes are
Most active volcanoes form
The volcanoes of Hawaii and other places far from tectonic plate boundaries are known as
Which catagory of volcano is most likely to erupt in the near future?
A tiltmeter is an instrument that measures
Volcanoes are most likely to form
Lava that has a fluid, runny consistency probably
Which kind of volcano is most likely to erupt soon?
Which kind of volcano will probably never erupt again?
Repeated eruptions of lava create
Mt. Rainier and Mt. St. Helen's are
Magma forms deep in the Earth's crust and in the mantle where
Only about 5% of volcanoes on land form
When infrared images show that an area is getting hotter, what is probably happening there?
When a magma chamber empties, a(n) __________________ results.
Parts of tectonic plates that are located above mantle plumes are called ___________________.
The molten rock inside a volcano is called __________________.
Cool, stiff lava that forms jumbled heaps is called __________________.
Craters, calderas and lava plateaus are volcanic _____________________.
A volcanically active place away from a tectonic plate boundary is a(n) ________________.
An area where tectonic plates collide is called a(n) _____________________.
One tectonic plate slides underneath another in a process called __________________.
A set of deep cracks between tectonic plates is called a(n) ____________________.
A _______________ is like an underground lake of molten rock.
Once magma flows onto the Earth's surface, it is called ________________.
A landform called a _______________ is capable of great destruction and great creation.
Scientists often use a global positioning system, or __________________, to detect changes in a volcano's shape.
Changes in temperature show up in infrared _______________ images.
Changes in temperature, slope or earthquake activity indicate changes in a volcano's ____________________.
A set of deep cracks between tectonic plates.
Columns of rising magma.
Where tectonic plates separate.
Where tectonic plates collide.
Underwater volcanoes and mountains.
A volcanically active area that is not near a tectonic plate boundary.
Pours out quickly and forms a brittle crust.
Forms from underwater eruptions.
Oozes from a volcano and does not travel far.
Flows slowly and has a glassy surface.