A volcanic eruption that has a ton of ash would be classified as a _____________ eruption.
What is explosive?
100
Volcanic ash can cause global temperatures to _____________.
What is drop?
100
Magma forms within the mantle as a result of _____________ temperature and _____________ pressure.
What is high/low
100
A _____________ volcano is built of layers of lava from repeated nonexplosive eruptions.
What is shield?
100
A _____________ results when an empty magma chamber collapses.
What is caldera?
200
Which of the following is not a form of pyroclastic material?
- volcanic bombs - volcanic blocks - ah - ash
What is ah?
200
A _____________ volcano is made of pyroclastic material.
What is cinder cone?
200
Volcanoes are most likely to form along _____________.
What is plate boundaries?
200
At divergent plate boundaries, tectonic plates move _____________.
What is apart
200
As tectonic plates separate, a deep crack, or _____________ forms between the plates.
What is rift?
300
A volcano is more likely to erupt explosively if it has a high ___________ and _____________ content.
What is silica and water
300
Volcanic _____________ can mix with water and destroy objects in its path.
What is ash
300
Magma rises towards the surface of the earth because it is _____________ dense than the surrounding rock.
What is less?
300
Which of the following is not used to help predict eruptions?
- seismic activity - changes in ultraviolet radiation - internal temperature - change in cone shape
What is changes in ultraviolet radiation?
300
_____________ volcanoes have not erupted in recorded history.
What is extinct?
400
_____________ eruptions have a relatively calm outpouring of lava.
What is non explosive
400
Volcanic ash can smother crops, causing _____________.
What is a food shortage?
400
The rock on the Earth's mantle is solid because of high _____________ from the rock above it.
What is pressure?
400
Older islands in Hawaii are northwest of the newer islands because they formed first and were moved away from the _____________.
What is hot spot?
400
_____________ are parts of tectonics plates that are located above magma plumes.
What is hot spots?
500
An explosive eruption produces _____________, including ash, volcanic blocks, and volcanic bombs.
What is pyroclastic material.
500
A caldera results when an empty _____________ collapses.
What is magma chamber?
500
The tectonic plates surrounding the Pacific OCean have so many volcanoes it is known as _____________.
What is Ring of Fire?
500
_____________ volcanoes are not currently erupting, but have in recorded history.
What is dormant?
500
A volcano that erupts intermittently can be classified as _____________.