Magma and Volcanic Eruptions

Magma becomes lava when it reaches a volcano's ______.

• Vent

• Crater

• Chamber

• Mantle

Lava that forms creases and loops when it hardens is called _________.

• A'a

• Pahoehoe

• Silica

• Lahar

In a volcano, magma collects in a packet called ________.

• Magma flow

• Magma chamber

• Magma pipe

• Hot spot

A string of volcanic islands called __________ can be formed along a trench.

• A boundary plate

• An island arc

• A hot spot

• An old denser plate

Is the process by which an ocean floor sinks beneath an ocean trench and into the mantle.

• Subduction

• Hot spot

• Caldera

• Volcanism

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

A ______ is a duct connecting the magma chamber and the outside of the volcano.

• Vent

• Crater

• Lava flow

• Volcanic cone

Refers to the movement of lava as it flows out from the vent.

• Lava flow

• Magma flow

• Pahoehoe

• A'a

An opening on the Earth's crust through which hot molten rock flows out from deep inside the Earth.

• Volcano

• Fault line

• Fold

• Crater

Tags

NGSS.MS-ESS3-2

Comprises the many volcanoes that rim the Pacific Ocean

• Ring of Fire

• Mid-Atlantic Ridge

• Eurasian-Melanesian Mountain Belt

• Pacific Rim

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS3-2

Are long, underwater mountain ranges that sometimes have rift valleys down their centers.

• Ridges

• Oceanic Plate

• Trench

• Subduction Zone