Volcanic Phenomena Quiz handout (2)

What are lava flows?

• Water vapor from volcanic activity

• Gases released during eruptions

• Stream-like flows of molten rock

• Solidified ash particles

What is ashfall or tephra fall?

• A type of volcanic gas

• A volcanic landslide

• A form of lava flow

• Showers of airborne volcanic particles

What are pyroclastic flows?

• Solidified volcanic rocks

• Slow-moving lava

• Turbulent masses of ejected volcanic materials

• Water mixed with volcanic sediments

What triggers lahars?

• Earthquakes

• Intense rainfall

• Volcanic gases

• Lava domes

What are ballistic projectiles?

• Ejected volcanic materials with force

• Volcanic gases

• Water vapor released during eruptions

• Types of ashfall

What causes tsunamis in relation to volcanic activity?

• Lava flows

• Volcanic gases

• Sudden displacement of water

• Ashfall

What is a debris avalanche?

• A volcanic gas release

• A type of lava flow

• Massive collapse of a volcano

• A form of ashfall