Volcanoes Practice Quiz

A  line of volcanic activity that surrounds the Pacific Ocean basin is the 

• Ring of Fire
• Aleutian Islands
• Hawaiian Islands
• Caribbean Islands

This volcano is most likely which type of volcano?

• Felsic
• Composite
• Shield
• Cinder cone

Once magma reaches the earth's surface it is called.....

• Silica
• Rock
• lava

Magma leaves a volcano through a 

• dike
• sill
• vent

An explosive eruption occurs if magma is

• low in viscosity

• high in viscosity

• very thin

When a volcano erupts quietly, what kind of mountain forms?

• A Shield Volcano
• Cinder Cone Volcano
• Composite Volcano

Volcanoes are common along oceanic trenches because this is where 

• most hotspots are found.
• subduction occurs.
• new seafloor forms.
• none of the above

__________ volcanoes are usually steep sided. They are formed from layers of ash and lava.

• Shield
• Cone
• Dormant
• Extinct

A subduction zone is...

• plates pull apart.
• the continental plate slides under the oceanic plate.
• where the oceanic plate slides under the continental plate.
• plates slap each other a high five.

Before lava reaches the surface it is called

• rock
• magma
• volcanic ash
• liquid fire