F.6 GCE Volcanoes Quiz

What is a lava flow?

• A fast-moving stream of ash and gas

• Molten rock flowing from a volcanic vent

• A type of volcanic gas

• A solid rock formation

What temperature range can pyroclastic flows reach?

• 200-700°C

• 800-1100°C

• 100-200°C

• 300-500°C

What do lahars primarily consist of?

• Lava and gases

• Solidified volcanic rock

• Airborne ash and tephra

• Water, ash, and rock fragments

Which hazard is caused by the failure of a slope on a volcano?

• Lahar

• Pyroclastic flow

• Landslide

• Tephra

What is tephra?

• Anything thrown into the air during a volcanic eruption

• Dust and ash from volcanic eruption

• Large rock fragments ejected into the air

• A fast-moving volcanic gas

Volcanoes can release a variety of gases, which include... (Select all that apply)

• Sulfur Dioxide (SO₂)

• Carbon Dioxide (CO₂)

• Hydrogen Sulfide (H₂S)

• Oxygen (O₂)

What phenomenon can be triggered by underwater landslides?

• Earthquakes

• Tsunamis

• Volcanic eruptions

• Ash clouds

What is "vog"?

• A type of volcanic ash

• A fast-moving lava flow

• Volcanic smog formed by chemical reactions

• A type of volcanic gas

Label the volcanic hazards

a

b

c

d

e

f

ashfall

lava flow

volcanic gases

landslide

lahar

pyroclastic flow

Match the following

• Not expected to erupt again

• Extinct volcanoes

• Not erupted in a long time

• Active volcanoes

• Erupt frequently

• Dormant volcanoes