Geology: Volcanos

Question 1

Volcano

Answer 1

A vent or fissure in the Earth’s surface through which magma and gases are expelled

Question 2

Magma

Answer 2

Molton rock

Question 3

Lava

Answer 3

Magma that flows onto the Earth’s surface

Question 4

Vent

Answer 4

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

Question 5

Volcanic Ash

Answer 5

Forms when the gases in stiff magma expand rapidly and the walls of the gases bubble explode into tiny, slivers

Question 6

Pyroclastic Flow

Answer 6

Particularly dangerous type of volcanic flow

Question 7

Shield Volcano

Answer 7

Built of layers of lava released from repeated nonexplosive eruptions

Question 8

Cinder Cone Volcano

Answer 8

Built of pyroclastic material usually produced from moderately explosive eruptions

Question 9

Composite Volcano

Answer 9

explosive eruptions of pyroclastic material followed by quieter flows of lava; common

Question 10

Caldera

Answer 10

Large semicircular depression that forms when the magma chamber below a volcano particularly empties and causes the ground above to sink