DRRR 1ST QUARTER EXAM

Front

It is an opening in the Earth’s crust that allows molten rock, gases, and debris to escape to the surface.

Back

Volcano

Front

Refers to surface changes on a volcano, such as subsidence (sinking), tilting, or bulge formation, due to the movement of magma below the surface.

Back

ground deformation

Front

Smell of sulfur (rotten eggs)

Back

Olfactory

Front

Stream-like flows of incandescent molten rock erupted from a crater or fissure.

Back

lava flows

Front

Showers of airborne fine- to coarse-grained volcanic particles that fallout from the plumes of a volcanic eruption.

Back

Ashfall or tephra fall

Front

Turbulent masses of ejected fragmented volcanic materials (ash and rocks), mixed with hot gasses (200°C to 700°C to as hot as 900°C) that flow downslope at very high speeds (>60kph).

Back

Pyroclastic flows

Front

Rapidly flowing thick mixture of volcanic sediments and water, usually triggered by intense rainfall during typhoons, monsoons, and thunderstorms.

Back

lahars

Front

Are volcanic materials directly ejected from the volcano’s vent with force and trajectory?

Back

Ballistic projectiles

Front

Are gasses and aerosols released into the atmosphere, which include water vapor, hydrogen sulfide, sulfur dioxide, carbon monoxide, hydrogen chloride, hydrogen fluoride.

Back

Volcanic gasses

Front

Massive collapse of a volcano, usually triggered by an earthquake or volcanic eruption

Back

Debris avalanche