Melted rock underground or inside a volcano is called...
What is magma?
100
The most quiet volcanoes are _____________ volcanoes.
What is shield?
100
True or False? A volcano can have more than one vent.
True.
100
The funnel-shaped pit at the top of most volcanoes.
What is crater?
100
A weakness found in a plate that can produce volcanic activity is refered to as this.
What is hot spot?
200
Magma that comes out of a volcano is called...
What is lava?
200
When a volcano has a lot of gas, its eruptions are...
What is explosive?
200
Volcanic islands are created near...
hot spots or mantle plumes or mid-ocean ridges
200
The result of a magma chamber roof collapsing, forming a large, circular depression.
What is caldera?
200
Holes in the Earth's crust that magma rises through.
What are vents?
300
What 2 types of boundaries do volcanoes occur at?
What are convergent and divergent boundaries?
300
What are the 2 internal factors that determine a volcano?
amount of silica and amount of gas
300
Pahoehoe, Aa, & Pillow.
What are types of lava?
300
The movement of one plate under another.
What is subduction?
300
Made from alternating layers of pyroclastic material and lava.
What are composite volcanoes?
400
Where most of the world's volcanoes on land.
What is the Ring of Fire?
400
The hot liquid that forms when rock partially or completely melts.
What is magma?
400
Sometimes magma rises upward through cracks in the crust, but does not reach the surface. The magma cools and hardens into rock beneath the surface creating which types of features.
What are intrusive rock features?
400
Volcanic ash can cover a wide area. It can also destroy
What is vegetation?
400
A mountain that forms from lava is a ...
What is volcano?
500
Made entirely of pyroclastic material from moderately explosive eruptions.
What are cinder cone volcanoes?
500
Broad base with sides that get steeper towards that summit.
What is the shape of composite volcanoes?
500
This type of magma is usually associated with cindercone volcanoes.
What is andesitic magma?
500
An example of composite volcano that erupted in Washington state in 1980 with devastating effects is called.
What is Mount Saint Helens?
500
It flows fast. Gases can escape from it. It is not explosive.