Exam 5: Volcanoes and Volcanism

Describe igneous activity at convergent plate boundaries.

At Laki fissure in Iceland,the eruption of the gas ____________________ caused about 75% of the nation's livestock to die,25% of the population to die,and crops to fail.

Nuée ardentes erupt from:

A lava tube is a hollow space left when the lava within a flowing tube drains away,leaving only the outside as hardened rock.

Volcanism occurs along the following two types of plate boundaries: ____________________ and ____________________.

The type of volcano that is the most common in the two major volcanic belts on Earth is ____________________.

Give an example of a caldera.

Briefly explain how magma can originate at spreading zones if temperatures at such shallow depths cannot alone produce melting.

An example of a caldera is:

According to plate tectonic theory,why are there volcanoes in Hawaii?

One indicator of an impending volcanic eruption that precedes all Hawaiian volcanic eruptions is a continuous ground motion called ____________________.

The most volcanically active region of the contiguous United States is the ____________________.

Volcanism profoundly affects the atmosphere,hydrosphere,and biosphere.

Intermediate and felsic magmas usually arise where:

Earth is the most volcanically active body in our solar system.

Why is Crater Lake in Oregon considered to be misnamed?

What are the reasons that volcanism is primarily a constructive process?

Describe composite volcanoes.How do they differ from shield volcanoes and cinder cones?

What are some of the techniques used to monitor volcanoes?

How could you distinguish a volcanic crater from a caldera?