Volcanoes

Where do tectonic plates spread apart and magma rises through a gap to form a volcano?

• subduction zone

• divergent plate boundary

• convection zone

• convergent plate boundary

Which type of activity creates the most violent volcano?

• oceanic-oceanic plate collision

• rift formation

• magma moving in a hot spot

• continental-oceanic plate collision

What can cause a drop in global temperature?

• a Strombolian eruption

• pluton formation

• more than 100 km³ of pyroclastic flow

• a large cloud of volcanic ash

A volcano that only has a plug left is most likely

• dormant

• a cinder cone

• extinct

• a composite volcano

A volcano with a gentle slope made mostly of flowing lava is

• a shield volcano

• a cinder cone

• a caldera

• a pluton

Which of the following do volcanologists NOT monitor?

• temperature of the volcano

• number of volcanic bombs

• changes in gases

• size and shape of the volcano

A place on earth directly above a column of rising magma is

• a caldera

• a pluton

• an ocean

• a hot spot

The place where one tectonic plate is pushed under another is

• a subduction zone

• a divergent boundary

• a magma chamber

• a mountain

Lava that has a smooth billowy surface is

• a'a

• pahoehoe

• pyroclastic flow

• a wave

A body of magma that has hardened under ground is

• pluton

• lava rock

• a volcano plug

• a hot spot