a vent or fissure (crack) in the EArth's surface through which magma and gases are expelled

calm flows of lava on Earth's surface

molten liquid rock under the Earth's surface

molten liquid rock that flows onto the Earth's surface and eventually hardens

clouds of hot debris, ash, and gas rapidly shoot out from a volcano

magma is blasted into the air and hardens

a body of molten rock deep underground that feeds a volcano

an opening at the surface of the Earth through which volcanic material passes

clouds of hot debris, ash, and gas rapidly shoot out from a volcano

magma is blasted into the air and hardens

a body of molten rock deep underground that fees a volcano

an opening at the surface of the Earth through which volcanic material passes

clouds of hot debris, ash, and gas rapidly shoot out from a volcano

the thickness of a liquid and how slowly or quickly it flows

a body of molten rock deep underground that feeds a volcano

magma is blasted into the air and hardens

forms when lava erupts under water

the thickness of a liquid and how slowly or quickly it flows

lava that flows slowly (high viscosity) like wax dripping fro a candle

lava that pours out quickly (low viscosity) and forms a brittle crust that breaks into jagged pieces

forms when lava erupts under water

the thickness of a liquid and how slowly or quickly it slows

lava that flows slowly (high viscosity) like wax dripping from a candle

lava that pours out quickly (low viscosity) and forms a brittle crust that breaks into jagged pieces

forms when lava erupts under water

the thickness of a liquid and how slowly or quickly it flows

lava that flows slowly (high viscosity) like wax dripping from a candle

lava that pours out quickly (low viscosity) and forms a brittle crust that breaks into jagged pieces

forms when lava erupts under water

the thickness of a liquid and how slowly or quickly it flows

lava that flows slowly (high viscosity) alike wax dripping from a candle

lava that pours out quickly (low viscosity) and forms a brittle crut that breaks into jagged pieces

cool, stiff lava that does not travel far from the vent and forms jumbled heaps of sharp-edged chunks

forms when the gases of stiff magma expand rapidly and the walls of the gas bubbles explode into tiny, glasslike slivers

little stones (bits of magma) that hardened before they hit the ground

the largest pieces of pyroclastic material (solid rock) that erupt from a volcano

cool, stiff lava that does not travel far from the vent and forms jumbled heaps of sharp-edged chunks

forms when the gases of stiff magma expand rapidly and the walls of the gas bubbles explode into tiny, glasslike slivers

little stones (bits of magma) that hardened before they hit the ground

the largest pieces of pyroclastic material (solid rock) that erupt from a volcano

cool, stiff lava that does not travel far from the vent and forms jumbled heaps of sharp-edged chunks

forms when the gases of stiff magma expand rapidly and the walls of the gas bubbles explode into tiny, glasslike slivers

little stones (bits of magma) that hardened before they hit the ground

the largest pieces of pyroclastic material (solid rock) that erupt from a volcano

cool, stiff lava that does not travel far from the vent and forms jumbled heaps of sharp-edged chunks

forms when the gases of stiff magma expand rapidly and the walls of the gas bubbles explode into tiny, glasslike slivers

little stones (bits of magma) that hardened before they hit the ground

the largest pieces of pyroclastic material (solid rock) that erupt from a volcano

a funnel-shaped pit near the top of the central vent of a volcano

most common volcanoes, formed from explosive eruptions of pyroclastic material, followed by quiet flows of lava

steep sides made of layers of pyroclastic material

gently sloping sides, built of many layers of lava released from repeated nonexplosive eruptions

a funnel-shaped pit near the top of the central vent of a volcano

most common volcanoes, formed from explosive eruptions of pyroclastic material, followed by quiet flows of lava

steep sides, made of layers of pyroclastic materials

gently sloping sides, built of many layers of lava released from repeated nonexplosive eruptions

a funnel-shaped pit near the top of the central vent of a volcano

most common volcanoes, formed from explosive eruptions of pyroclastic material, follwed by quiet flows of lava

steep sides, made of layers of pyroclastic materials

gently sloping sides, built of many layers of lava released from repeated nonexplosive eruptions

a funnel-shaped pit near the top of the central vent of a volcano

most common volcanoes, formed from explosive eruptions of pyroclastic material, followed by quiet flows of lava

steep sides, made of layers of pyroclastic materials

gently sloping sides, built of many layers of lava released from repeated nonexplosive eruptions

currently erupting or showing signs of erupting very soon

currently not erupting, although they may erupt again in the future

a large, semi-circular depression that forms when the magma chamber below a volcano partially empties and cause the ground about to sink

lava pouring from long cracks in the Earth's crust over a long period of time

currently erupting or showing signs of erupting very soon

currently not erupting, although they may erupt again in the future

a large, semi-circular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink

lava pouring from long cracks in the Earth's crust over a long period of time

currently erupting or showing signs of erupting very soon

currently not erupting, although they may erupt again in the future

a large, semi-circular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink

currently erupting or showing signs of erupting very soon

currently not erupting, although they may erupt again in the future

a large, semi-circular depression that forms when the magma chamber below a volcano partially empties and causes the ground above to sink

lava pouring from long cracks in the Earth's crust over a long period of time