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Volcano Info
EnchantedLearning.com
Volcano Dictionary

Volcano Activities and Printouts
Types of Volcanoes The Ring of Fire
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

'a'a

'A'a (pronounced "ah-ah") is a Hawaiian term for a lava flow that has a rough, broken-up, spiny surface. It is composed of broken lava blocks called clinkers. The interior of 'a'a is very dense.

accretion

Accretion is the accumulation of sediment (mud, sand, etc.) by deposition, often occurring along a shoreline or in a river delta.

acid rain

Acid rain is polluted and harmful to the environment.

active volcano

An active volcano is one that has erupted in recorded history or is currently erupting.

aerosol

An aerosol consists of tiny particles of liquids or solids suspended in the air.

aftershock

Aftershocks are small earthquakes that occur after a large earthquake.

airfall

Airfall (also called ashfall) is volcanic ash that falls from an ash cloud or a volcanic column.

andesite

Andesite is a type of volcanic rock. This gray to black rock is composed of about 54 to 62 percent silica (SiO2), plus some iron and magnesium.

ash cloud

An ash cloud (also called an eruption cloud) is the cloud of ash that forms after some volcanic eruptions.

ashfall

Ashfall (also called airhfall) is volcanic ash that falls from an ashcloud or a volcanic column.

ash, volcanic

Volcanic ash is a harsh abrasive type of ash (unlike ash from a wood fire) that is made up of small rock, mineral, and volcanic glass fragments (these fragments are less than 0.1 inch (2 mm) in diameter).

asthenosphere

The asthenosphere (also spelled aesthenosphere) is a part of the Earth's upper mantle that exhibits plastic properties. It is located below the lithosphere (the crust and upper mantle), between about 100 and 250 kilometers deep.

atmospheric shock wave

An atmospheric shock wave is compressed air that is formed by a volcanic eruption.

atom

Everything is made up of tiny atoms. An atom is the smallest part of an element that has the properties of that element.

avalanche

An avalanche is a a large mass of falling and/or sliding material. Avalanches can be composed of rock, snow, soil, or ice. Volcanic eruptions can cause avalanches.


Volcano Info
EnchantedLearning.com
Volcano

Volcano Activities and Printouts
Types of Volcanoes The Ring of Fire
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Click on an underlined word for more information on that subject.
If the volcano term you are looking for is not in the dictionary, please e-mail us.

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