Earth Science, Chapter 9, Review

The pyroclastic material that can reach the upper atmosphere and circle the Earth for years is

Lava that is very runny probably

Most active volcanoes form

A volcano that will probably erupt sometime in the future is

Which of the following can happen during nonexplosive eruptions?

A small volcano; usually erupts only for a short time

A large flat area covered by lava

The amount of _ in the magma determines the strength of the explosion.

A funnel shaped pit

Pyroclastic material forms when

A rift zone is a series of cracks that form along a __ plate boundary.

An oceanic plate collides with a continental plate, it is usually subducted because

The __ is a group of volcanoes that are located on convergent plate boundaries in the Pacific.

The explosive volcano produces dust sized particles called__.

To predict eruptions scientists study the frequency and types of _ associated with the volcano.

Molten rock deep underground often gathers in a

Most volcanoes form

A __ is an opening at the surface of the Earth through which volcanic material passes.

If the water conten of magma is high

Rock begins to melt when

__ erupts underwater and forms rounded lumps.

Large volumes of gas and ash released from volcanic eruptions can affect

The three main types of volcanoes are

Which type of lava flows most like dripping wax?

Which category of volcano is most likely to erupt in the near future?

A funnel shaped pit is

A crater is a funnel shaped hole around the

The depression created when the roof of a magma chamber collapses is called a

When you talk about he viscosity of lava, you are talking about

A volcano that will probably not erupt again is

A volcano that will probably erupt soon is

Which of these describes a possible climate change caused by a volcanic eruption?

__ flows slowly and has a wrinkled surface.

Which of these would you expect to see during a nonexplosive eruption?

A small volcano made up entirely of pyroclastic materials is

A large volcano built of many layers of lava is a

Lava is classified by its surface

Where are volcanoes most likely to form?

__ flows quickly and has a jagged crust.

Molten rock flowing on the Earth's surface is

The landforms that we call volcanoes are created by

A large flat area covered by lava is a

Cool, stiff lava that forms jumpled heaps of sharp chucks near the vent is called

The volcanoes of Hawaii and other places far from tectonic plate boundaries are known as

An opening in the Earth's crust is a

Measured from the seafloor, the volcano __ is the tallest mountain in the world.

A tiltmeter is an instrument that measures

Created by a combination of expolosive and nonexplosive eruptions

Melted rock below the Earth's surface is

Which type of pyroclastic material gets its name from a word that means "little stones"?