Volcanoes

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

• Hot Spot
• Magma
• Lava
• Volcano

The volcanoes on the Hawaiian Islands form from to which of the following?

• Divergent Boundary
• Hot Spot
• Subduction Boundary
• Transform Boundary

What type of lava cools quickly and forms rock with jagged edges?

• Aa
• Magma
• Pahoehoe
• Pillow Lava

What type of lava cools slowly and forms rock with smooth, ropelike features?

• Aa
• Magma
• Pahoehoe
• Pillow Lava

What are very large rock fragments that are ejected during a volcanic eruption?

• Bombs
• Magma
• Ash
• Silica

What type of volcano is built by alternating layers of ash and lava flows? It can be very explosive

• Caldera
• Cinder Cone
• Composite Volcano
• Shield Volcano

What type of volcano has steep side and is made of lava fragments that have been ejected and come down as cinders?

• Caldera
• Cinder Cone
• Composite Volcano
• Shield Volcano

Where are most volcanoes found?

• Southern Hemisphere
• Ring of Fire
• Mid-Atlantic Ridge
• Hot Spots

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

• Muckimuck
• Lava
• Magma
• Pahoehoe

What is the opening in Earth's crust through which molten rock, gases, and ash erupt?

• Divergent Boundary
• Magma
• Subduction Boundary
• Volcano