Volcanoes

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

• Hot Spot
• Magma
• Lava
• Volcano

What is molten rock that has reached the Earth's surface?

• Aa
• Lava
• Magma
• Pahoehoe

What factor(s) determine(s) whether an eruption will be explosive?

• The amount of gases in the magma
• The amount of silica in the magma
• The amount of gas and silica in the magma
• None of these affect the explosiveness of the 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 is the definition of dormant?

• sleeping
• extinct
• active
• invisible

What are scientists that study volcanoes called?

• doctor
• vet
• volcanologist
• volcano scientist

A volcano that has gentle sloping sides and is formed from runny lava

• Shield volcano
• Cinder cone
• Composite
• None of these

This is the name for the chain of volcanos around the edge of the Pacific Plate.

• Circle of Fire
• Ring of Lava
• Ring of Fire
• Circle of Magma

A volcano that has steep sides and is formed from lava chunks is called

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

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