VOLCANIC-RELATED HAZARDS

Which of the following best describes a volcano?

• A large body of water

• A tall mountain range

• A vent or opening in Earth's crust from which molten rock, ash, and gases escape

• A deep ocean trench

1. What is the molten rock called that erupts from a volcano?

• 1. Magma

• 1. Sediment

• 1. Lava

• 1. Obsidian

1. Which volcanic hazard refers to a fast-moving mixture of hot gases, ash, and rock fragments that flows down the slopes of a volcano?

• 1. Pyroclastic flow

• 1. Lava flow

• 1. Lahar

• 1. Ashfall

1. Which volcanic hazard is associated with the release of toxic gases such as sulfur dioxide and carbon dioxide?

• 1. Pyroclastic flow

• 1. Volcanic gases

• 1. Lava flow

• 1. Ashfall

1. Which volcanic hazard refers to a mudflow of volcanic debris and water that can occur during or after a volcanic eruption?

• Pyroclastic flow

• Lava flow

• Lahar

• 1. Ashfall

1. What is the term for a volcanic hazard that occurs when volcanic ash and other particles fall from the sky?

• 1. Pyroclastic flow

• 1. Lava flow

• 1. Lahar

• 1. Ashfall

It is a flowing slurry of volcanic debris and water that originates on volcanoes.

What volcanic hazard can cause extensive damage by burning, crushing, or burying everything in their path?

One of the effects of this volcanic hazard is producing suspensions of fine-grained particles in air and water

One of the gases that is emitted during a volcanic eruption is