The long tube in the ground that connects the magma chamber to the surface is known as...?
What is the pipe
100
Lava build upa high level area it is called...?
What is a lava plateau
100
Why does magma flow upward thhrough cracks in rocks?
What is because it is less dense than the surrounding material.
100
Because the cores of Mercury and Mars have cooled scientists believe...?
A . Volcanic activity has just begun.
B. Volcanic activity on these planets have ended.
What is B.
100
Where do volcanic belts form?
What is along plate boundaries.
200
Cone shaped mountains in which layers of lava alternate with layers of ash.
What is a composite volcano.
200
When magma squeezes between layers of rock it creates a ...?
What is a sill.
200
When magma is high in silica; how will the volcano erupt?
What is it will erupt explosively.
200
Before lava reaches the surface it is called?
What is Magma.
200
Rock particles the size of a grain of sand.
What is volcanic ash.
300
A volcano that may erupt again in the near future is called...?
What is active.
300
A massive rock formed from the cooling of lava.
What is a batholith.
300
Define Pahoehoe.
What is hot, fast moving lava.
300
Define pyoclastic flow.
What is lava flow containig cinders, ash, and bombs.
300
Which planet has shiel volcanoes and lava flows similar to Earths'.
What is Venus
400
When ash cinders and bombs build up around a volcanoes vent the result is what type of volcano?
What is cinder cone volcano.
400
A huge holsleft by the collapse of a volcano is called a..?
What is a caldera.
400
What provides the force that causes magma to erupt to the surface?
What is dissoved gases trapped in the magma.
400
The smooth places on the Earth's moon visible from earth are from what...?
What is where lava used to flow billions of years ago.
400
Besides Earth what other bodies in the solar system still have volcanic eruptions?
What is Io and Triton
500
Magma that forces across rock layers forms...?
What is a dike.
500
When magma hardens in a volcanoe's pipe the resulting landform will eventually be...?
What is a volcanic neck.
500
What helps to determine how easily magma flows?
What is the amount of silica in the magma.
500
T or F It is 100 percent certain that an extinct volcano will never again erupt.
What is F.
500
The eruptions on Triton involve ....?
A. Sulfur
B. Nitrogen