Volcanoes

Volcanic belts form along

• islands in the Pacific Ocean
• North American mountain ranges
• the boundaries of Earth's plates
• the coast of Antarctica

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

Liquid magma flows upward through cracks in rock because it is 

• highly fluid
• less dense than the surrounding solid material
• highly magnetic
• more dense than the surrounding solid material

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

• vent
• side vent
• pipe
• crater

If a volcano's magma is high in silicia, the volcano will probably

• erupt quietly
• remain dormant
• erupt explosively
• produce dark color lava

Pahoehoe is 

• cooler, slower moving lava
• fast moving lava
• volcanic ash 
• lava with a rough, chunky surface

When groundwater heated by magma rises to the surface and collects in a natural pond, it is called a 

• hot spring
• geyser
• vent
• pyroclastic flows

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

• lava flows
• silicia
• geothermal energy
• pyroclastic flows

Which of the following volcano hazards is made up of rocky particles about the size of a grain of sand?

• volcanic bombs
• pahoehoe
• volcanic cinders
• volcanic ash

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called

• shield volcanoes
• cinder cone volcanoes
• composite volcanoes
• lava plateaus