Most of the world's active volcanoes are located in one of two volcano belts.

Studying volcanos helps scientists _____ eruptions and ______the risks associated with their hazards.

Volcanoes are dangerous and knowing about volcanoes can save lives

An opening in the crust of the earth through which lava, ash, and gases flow

Type of mountain that can form from the accumulation of the material that flows from volcanos… also, can be formed by sediment carried by wind or by glaciers

Volcanoes are ________ igneous depositional mountains

A volcano builds up from _____ .

T or f: a a volcano can also form from parasitic craters nearby it.

A large underground pool of molten rock, or magma, that sits beneath a volcano and stores magma before an eruption

An opening in the earth’s crust where lava, gases, and ash can escape.

Molten rock that escaped earth’s interior

A hill or mountain formed by the accumulation of volcanic material

A smaller volcano that forms on the flank(side) of a larger volcano

A bowl shaped depression on top of a volcano

A depression that forms when a magma chamber empties and collapses

Collapsed volcanoes may form huge craters called _____ that sometimes fill with water

The three main types of magma are classified by how much _______ they contain

Type of magma that has >63% silica…….(greater than)

Type of magma that has 52-63% silica

Type of magma that has < 52% silica ( less than)

Volcanic liquid emissions differ in chemical composition and viscosity

The more silica in the liquid of lava, the ______ the lava is.

A viscous liquid is slow flowing

Molasses has a higher viscosity than water

T or f; lava causes relatively few deaths

Pick all that apply-

How lava solidifies depends on _____

This type of lava is fast

This type of lava is slow

This type of lava is underwater

Pyroclastic material and ash are example of this type of emission from a volano

Ash can range in size from microscopic to _____ in size

T or f.: clouds of ash can travel around the world and endanger aircraft that fly through them.

When a volcano erupts a mixture of hot solid particles suspended in water vapor or other gases, also known as a glowing avalanche, it is so dense that it flows down the volcanoes slope instead of rising into the air.

Volcanos erupt ash, cinders, bombs, and large Chunks of rock. This solidified material is called ____

Glowing avalanche (Pyroclastic flow) flows down due to gravity

A ______ moves quickly, suffocating and burning things in its path.

A volcanic mudslide caused by melting snow

A vent in the ground where steam and other gases escape

Pyroclastic flows can displace ______ along the ground

Volcanoes can emit many kinds of heated gases, including steam and _________

Violent flows of heated gases can carry hot cinders and ash in what are called glowing avalances

A type of solid emission that ranges in size from 2-64 mm in diameter

Type of solid emission that ranges in size from baseball size to the size of a house

Type of solid emission that is larger than 64mm

Loose layers of Pyroclastic material that covers the ground

Pyroclastic materials ejected by volcanoes are _____ lava. They can vary in range from fine ash to huge blocks

Volcanoes occur in _____ active areas, such as convergent or divergent zones between tectonic plates.

Some geologists believe that. Volcanoes also developed above hot spots in the mantle in the past, producing strings of ______

This volcano belt is also known as the “ring of fire”

Most active volcanoes are located in 2 volcano belts. This one lies above the collision boundary of the African, I do-Australian, and sourthern tectonic plates

There are lots of volcanic islands in the Mid-ocean ______ zone

Volcnaic landforms formed during or after the Flood

Volcanic landforms are easily spotted on ________ maps

Thick layers of igneous rocks are called ____. Pick all that apply

A very broad region of surface igneous rock that covers a lot of Canada and north-central US.

Flood ______ zones are broad plains of thick lava rock that flowed from deep cracks in the crust. Some zones cover very large areas of land-like the Canadian Shiled