The viscosity of magma depends on its temperature and

• silicon content
• silica content
• mineral makeup
• magnetism

Cool, slow moving, high viscosity lava is called

• Aa
• Pahoehoe
• Lava
• magma

What is number 1?

• Pyroclastic flow

• Lava flow

• Vent

• Ash cloud

What is number 7?

• Pyroclastic flow

• Lava flow

• Magma

• Ash, cinders, and bombs

What is number 4?

• Pipe

• Vent

• Magma Chamber

• Crater

What is number 6?

• Pipe

• Vent

• Crater

• Magma Chamber

What type of volcano forms from only quiet eruptions?

• Composite
• Cinder Cone
• Shield

What type of volcano is shown above? 

• Strato
• Cinder Cone
• Shield

A large hole left by the collapse of a volcanic mountain is called a

• Crater
• Caldera
• Vent
• Volcano

If geologists detect many small earthquakes in an area near a volcano, what can they infer about the volcano?

• It is dormant
• It is probably about to erupt
• It is extinct 
• It is a good source of geothermal energy