Volcanoes

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

• Hot Spot
• Magma
• Lava
• 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?

• Aa
• Lava
• Magma
• Pahoehoe

Where do volcanoes come from?

• Places where plates move apart
• Places where plates are moving together
• Hot Spots
• All of these options

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

• Divergent Boundary
• Magma
• Subduction Boundary
• Volcano

The formation of the Hawaiian Islands is one example of

• volcanoes forming over a hot spot
• volcanoes forming along a plate boundary
• the Ring of Fire
• continental drift

The long tube in the ground that connects the magma chamber to Earth's surface is called the

• vent
• side vent
• pipe
• crater

Before lava reaches the surface it is called

• rock
• magma
• volcanic ash
• liquid fire

A volcano that may erupt again at some time in the distant future is 

• active
• dormant
• explosive
• extinct

If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?

• It is dormant
• It is probably about to erupt
• It is extinct
• It is a good source of geothermal energy