Study Guide Chapter 3 - Volcanoes

Question 1

Narrow zone of active volcanoes that parallels the circum-Pacific earthquake belt:

Answer 1

Ring of Fire

Question 2

Volcano that consists primarily of erupted volcanic ash and cinders:

Answer 2

Cinder-cone volcano

Question 3

Solid, irregular lump that forms when lava hardens within a volcano and is ejected in the solid state:

Answer 3

Volcanic block

Question 4

Lava that hardens to form either a smooth or ropy surface:

Answer 4

Pahoehoe Lava

Question 5

Particle or block of solid volcanic ejecta:

Answer 5

Pyroclast

Question 6

Channel of a volcano through which gases, ash, and rock are ejected:

Answer 6

Vent

Question 7

Scale to measure the explosiveness of a volcano’s eruptions:

Answer 7

Volcanic Explosivity Index (VEI)

Question 8

Mass of volcanic rock beneath the surface of the earth:

Answer 8

Igneous Intrusion

Question 9

Inactive volcano that could erupt again:

Answer 9

Dormant volcano

Question 10

Volcano that will probably not erupt again:

Answer 10

Extinct Volcano

Question 11

Volcano that has erupted within recorded history or is currently producing seismic activity:

Answer 11

Active volcano

Question 12

Dome-like igneous intrusion produced when magma bulges the overlying rocks upward:

Answer 12

Laccolith

Question 13

Plastic rock in the lower portion of the upper mantle:

Answer 13

Asthenosphere