Volcano

In volcanic areas, groundwater heated by magma is a source of 

• lava flows
• silicia
• geothermal energy
• pyroclastic flows

How thick something is or the ability of a fluid or liquid to flow is its 

• viscosity
• density
• velocity 
• flowability 

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

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

What kind of magma produces violent volcanic eruptions?

• Magma low in silica
• Magma that is fluid, and runny
• Magma that is high in gas content
• Magma rich in iron

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

A lahar is __ 

• A mudslide from melted icecaps
• Small chunks of rock that explode outward
• Tiny particles that blanket the country
• A completely made up thing--from Dr. Seuss

Which volcanic hazard is extremely fast moving hot ash and rocks? 

• Ash
• Pyroclastic flow
• Lahar

GPS, Tilt-meters, Gas sensors and seismic activity are all used to __ 

• Monitor volcanoes to try to predict them
• Prevent volcanic activity
• Back up scientific claims about earthquakes
• Contain volcano hazards 

What is the volcanic hazard that can travel the farthest? 

• Ash
• Pyroclastic flow
• Lahar
• Lava flow

TRUE OR FALSE:  A substance that flows quickly has high viscosity...

• True
• False