Volcanic Eruption

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

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

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

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

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

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

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

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

Comprises the many volcanoes that rim the Pacific Ocean

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