Volcanoes

What is molten rock that has formed deep within the Earth?

• Hot Spot
• Magma
• Lava
• Volcano

Why does magma tend to rise to the surface?

• It has large amounts of silica.
• It contains very little silica.
• It is denser than the surrounding material.
• It is less dense than the surrounding material.

What is the principal ingredient to all types of magma?

• Iron
• Magnesium
• Silica
• Water

What type of volcano is Mount St. Helens?

• Caldera
• Cinder Cone
• Composite Volcano
• Shield Volcano

The difference between magma and lava is _____

• where it is found (above or below the surface)
• how hot the molten rock is (lava is hotter than magma)
•  the type of boundary where it forms
• the viscosity of the molten rock (lava has a lower viscosity)

What stage is a volcano in when it is considered to be "sleeping"?

• Dormant
• Active
• Extinct
• Alive

What type of volcano is small with steep sides and is made of lava fragments that have been ejected?

• Caldera
• Cinder Cone
• Composite Volcano
• Shield Volcano

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash

• Cinder Cone volcano
• Shield volcano
• Composite volcano
• Caldera

What type of volcano is shown above? 

• Strato
• Cinder Cone
• Shield

A volcano that is made from layers of both runny lava and lava chunks is called 

• a shield volcano
• a cinder cone volcano
• a composite volcano