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

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

• Shield volcano

• Cinder cone

• Composite

• None of these

When an explosive eruption forms a mixture of hot rock, ash, and gas, this material is called a...?

• Land slide

• Lava

• Lahar

• Pyroclastic flow

This is the name for the chain of volcanoes 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 ejected ash, cinder, blocks, and bombs is called

• a shield volcano

• a cinder cone volcano

• a composite volcano

A volcano that is made from layers of both lava flows and pyroclastics is called

• a shield volcano

• a cinder cone volcano

• a composite volcano

Dormant volcanoes might erupt in the future.

• True
• False

A weak spot in the crust where molten material, or magma comes to the surface

• lava
• volcano
• earthquake
• tsunami

A molten mixture of rock-forming substances, gases, and water from the mantle

• Magma
• Lava
• Minerals
• Rocks