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Science Volcano Terms > Science Volcano Terms > Flashcards

Science Volcano Terms Flashcards

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1
Q

Shield Volcano

A

a wide, gently-sloping mountain made of layers of lava; formed by quiet eruptions

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2
Q

Volcanic Neck

A

hardened magma in a volcano’s pipe

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3
Q

Basin

A

a broad, bowl-shaped valley formed when the crust is bent forward

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4
Q

Cinder Cone

A

a steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs

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5
Q

Central Valley

A

the large basin in California between the Coast Ranges and the Sierra Nevada

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6
Q

Composite Volcano

A

a tall, cone-shaped mountain in which layers of lava and ash alternate

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7
Q

Geyser

A

a fountain of water and steam that builds up pressure underground and erupts at regular intervals

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8
Q

Extinct

A

a volcano that is no longer active and is unlikely to erupt again

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9
Q

Ring of Fire

A

volcano belt that rims the Pacific Ocean

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10
Q

Lava

A

liquid magma that reaches the surface; also, the rock formed when liquid lava hardens

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11
Q

Magma

A

the molten mixture of rock-forming substances, gases, and water form the mantle

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12
Q

Crater

A

a bowl-shaped area that forms around a volcano’s opening

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13
Q

Batholith

A

a mass of rock formed when a large body of magma cools inside the crust

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14
Q

Sill

A

a slab of volcanic rock formed when magma squeezes between layers of rock

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15
Q

Dike

A

a slab of volcanic rock formed when magma forces itself across rock layers

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16
Q

Caldera

A

the large hole formed at the top of a volcano formed when the roof of a magma chamber collapses

17
Q

Volcano

A

a weak spot in the crust where magma has come to the surface

18
Q

Lava Flow

A

area covered by lava from a volcano’s vent

19
Q

Vent

A

opening through which magma leaves a volcano

20
Q

Pipe

A

a long tube through which magma moves from the magma chamber to the surface

21
Q

Magma Chamber

A

the pocket beneath a volcano where magma collects

22
Q

Hot Spot

A

an area where magma from deep within the mantle melts through the crust above it

23
Q

Island Arc

A

a string of islands found by volcanoes along a deep-ocean trench

24
Q

Intrusion

A

an igneous rock layer formed when magma hardens beneath Earth’s surface

25
Q

Dormant

A

a volcano not currently active, but may become active again in the future

26
Q

Pyroclastic Flow

A

an explosive volcanic eruption of ash, cinders, bombs, and gases

27
Q

Silica

A

a material found in magma that is formed from the elements oxygen and silicon

28
Q

Dike

A

a slab of volcanic rock formed when magma forces itself across rock layers

Science Volcano Terms (1 decks)

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