volcanoes Flashcards
is a horseshoe-shaped belt of intense volcanic activity and frequent earthquakes that encircles the edges of the Pacific Ocean.
ring of fire
An opening in the earth’s crust through which molten lava, ash, and gases are ejected
volcano
the highest point or the apex of the volcano. At the summit, you have an opening called ven
summit
are the sides or flanks of a volcano that radiate from the main or central vent.
slopes
is lower outer part of the volcano.
base
A reservoir where magma is stored beneath the volcano.
mamgma chamber
A pipe-like structure that connects the magma chamber to the surface.
conduit
Flat rock formation that forms when molten magma cools and solidifies in a crack or fissure.
sill
The bowl-shaped depression at the top of the volcano.
crater
Mass of tiny volcanic rock fragments, dust, and gases that are released into the air
ash cloud
Steep, conical-shaped hill or mountain formed by layers of volcanic material
cone
Molten rock that flows from a volcano during an eruption.
lava
is a large depression formed when a volcano erupts and collapses.
Caldera
is the main opening or outlet on the surface of a volcano that emits lava, gases, ash or other volcanic materials.
main vent
