Volcanoes!!

What is the least deadly hazard of a volcanic eruption?

The volcanic eruption style is mostly dependent upon the

The vertical tube that carries magma from the magma chamber to the main vent is called the

A steep sided volcano type that is moderately to highly explosive, and 2,000-15,000 ft tall

When glacial peaks melt, or heavy rain occurs, flanks made of ash layers erode and form massive

If a pancake, chocolate chip, and a hershey kiss were volanoes, a shield volcano would be the

An igneous rock formation that forms when magma cools before erupting to the surface.

_____________ - hot, liquid rock that is inside Earth and contains all its gases

The most powerful eruption in the past 10,000 years

When magma cools and forms igneous rock before it has a chance to reach the surface

The world's most dangerous volcanoes form at __________________ around the Pacific Ocean.

The ______________ of a volcano is NOT a direct result of the composition of the magma.

Pinatubo was the first major success of the USGS.  They saved lives by

Small volcano type that has low to moderate explosivity, and is shaped like a lamp shade.

When magma has more dissolved gases in it, it makes the eruption style more

A cloud of incinerated rock, ash, and gases that blasts down the flanks of the volcanoes.

A basaltic volcano has 45-55% silica content.  This makes the magma less

Which of the follow are reasons that volcanoes are important?

Hawaiian volcanoes are less violent because

Inside a caldera, a ________________ forms when small eruptions continue after a large collapse

Which of the following is NOT a precursor to a volcanic eruption?

When an eruption causes the magma chamber to collapse, it forms a

A stratovolcano, or composite volcano, is made of alternating layers of

The oceans hide 80% of the Earth's volcanic activity, which occurs at the