Y8 (finally 🥲) Volcanic hazards Key Word test

Question 1

A hot (typically >800 °C, or >1,500 °F ), chaotic mixture of rock fragments, gas, and ash that travels rapidly (tens of meters per second) away from a volcanic vent or collapsing flow front 4000 degrees and at speeds of 100 km/h

Answer 1

Hazard: Pyroclastic flow
Volcano: Composite

Question 2

Chemicals in the air produced by volcanoes are composed mainly of water, carbon dioxide, and sulfur dioxide. During violent eruptions, these gases are injected into the stratosphere

Answer 2

Hazard: Gases
Volcano: composite, shield

Question 3

a hot or cold mixture of water and rock fragments that flow quickly down the slopes of a volcano

Answer 3

Hazard: Lahar
Volcano: composite

Question 4

Fragments of rock, mineral crystals, and volcanic glass, produced during volcanic eruptions and measuring less than 2 mm

Answer 4

Hazard: Volcanic ash
Volcano: composite

Question 5

Streams of molten rock that pour or ooze from an erupting vent. Lava is erupted during either nonexplosive activity or explosive lava fountains

Answer 5

Hazard: Lava flow
Volcano: Shield

Question 6

A rapid down-slope movement of rock, ash, and other volcanic material triggered by the collapse of part of a volcano. This can occur due to volcanic activity (such as an eruption), seismic events (earthquakes), or even the weakening of the volcanic structure by long-term erosion.

Answer 6

Hazard: Landslide
Volcano: Composite, Shield

Question 7

Large fragments of molten or semi-molten rock ejected during a volcanic eruption. They are typically larger than 64 mm in diameter and are thrown from the volcano with great force. While airborne, they cool and solidify into various shapes

Answer 7

Hazard: Lava Bombs
Volcano: Composite