Volcanoes (4) Flashcards Preview

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Flashcards in Volcanoes (4) Deck (17)
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1
Q

A weak spot in the Earth’s crust where magma comes to the surface

A

volcano

2
Q

Major volcanic belt formed by the many volcanoes in the rim of the Pacific Ocean

A

Ring of Fire

3
Q

area where material from deep within the mantle rises then melts, forming magma

A

Hot spot

4
Q

mixture of hot gases, ash, cinders and bombs hurled out from an explosive eruption

A

Pyroclastic flow

5
Q

“Sleeping” volcano, can become active again in the future

A

Dormant volcano

6
Q

volcano that is unlikely to erupt again

A

Extinct volcano

7
Q

A bowl shaped area that forms around a volcano central opening

A

Crater

8
Q

magma that reaches the earth’s surface

A

Lava

9
Q

A molten mixture of rock forming substances, gases, and water from the mantle beneath the earth’s surface

A

magma

10
Q

A pocket in the volcano where magma collects (towards the bottom of the volcano)

A

Magma chamber

11
Q

Area covered by lava as it pours out of a vent

A

Lava flow

12
Q

String of islands created by volcanoes near boundaries where 2 oceanic plates collide and one side sinks beneath the other

A

Island Arc.

13
Q

What does the volcano system include?

A

Magma chamber, pipe, vent, crater, and lava flows

14
Q

Low silica content
flows easily and erupts quietly
gases bubbling out gently and lava oozes out

A

Characteristics of a quiet eruption

15
Q

High silica content
flows easily and erupts loudly
gases bubbling until exploding

A

Characteristics of a explosive eruption

16
Q

Fast moving hot lava produces by quiet explosion

A

Pahoehoe

17
Q

Slow moving coal lava produced by a quiet eruption

A

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