Volcanic Phenomena Definitions

Lahar is an Indonesian term that describes a hot or cold mixture of water and rock fragments flowing down the slopes of a ______ and river valleys.

Ash fall is a rain of airborne ash resulting from a volcanic ______.

Pyroclastic flow are heavier-than-air gas- particle emulsions that ______ the ground at velocities ranging from 10 m/sec to 300 m/sec.

Ballistic projectiles are rocks that an erupting volcano may hurl into the ______.

________ Sulfur compounds, chlorine and fluorine react with water to form poisonous acids damaging to the eyes, skin and respiratory systems of animals even in very small concentrations.

Lava Flow It rarely threaten human life because lava usually moves slowly-a few centimeters per ______.

_______ is an Indonesian term that describes a hot or cold mixture of water and rock fragments flowing down the slopes of a volcano and river valleys.

Ash fall is a rain of airborne ash resulting from a volcanic ______.

Pyroclastic flow are heavier-than-air gas-particle emulsions that ______ the ground at velocities ranging from 10 m/sec to 300 m/sec.

________ Sulfur compounds, chlorine and fluorine react with water to form poisonous acids damaging to the eyes, skin and respiratory systems of animals even in very small concentrations.

Ballistic projectiles are rocks that an erupting volcano may hurl into the ______.

Lava Flow It rarely threaten human life because lava usually moves slowly-a few centimeters per ______.