3.3 Volcano study guide

1. a place on the earth’s surface that is directly above a column of rising magma

• pahoehoe
• tiltmeter
• hotspot
• caldera
• pluton

2. a place where one tectonic plate is pushed under another tectonic plate

• pahoehoe
• tiltmeter
• subduction zone
• caldera
• pluton

3. lava that has a smooth billowy surface

• pahoehoe

• tiltmeter

• hotspot

• caldera

• pluton

a body of magma that has hardened underground

• pahoehoe

• tiltmeter

• hotspot

• caldera

• pluton

a volcanic crater that is formed by the collapse of surface rock into an empty magma chamber

• pahoehoe

• tiltmeter

• hotspot

• caldera

• pluton

an instrument that uses liquid to register changes in the earth

• subduction zone

• tiltmeter

• hotspot

• caldera

• pluton

Tectonic plates spread apart and magma rises through the gap to form a volcano. Where does this occur?

• subduction zone
• divergent boundary
• convection zone
• convergent plate boundary

Which type of activity creates the most violent volcano?

• oceanic-oceanic plate boundary
• rift formation
• continental-oceanic plate collision
• magma moving in a hot spot

A volcano that only has a plug left is most likely

• dormant
• cinder cone
• composite
• extinct

A volcano with a gentle slope and made mostly of lava flows is

• cinder cone

• caldera

• shield volcano

• a pluton.