Science chapter 6

During a quiet eruption, a lava flow may set fire to and then bury everything in its path.

• True

• False

Magma always forces its way out of the side of a volcano through a side vent.

• True

• False

Ash, cinders, and bombs build up in a steep pile to form cinder cone volcanoes.

• True

• False

A dike forms when magma forces itself between rock layers and hardens.

• True

• False

A pyroclastic flow typically occurs during a quiet eruption.

• True

• False

• Dissolved minerals trapped in magma under tremendous pressure provide the force for a volcanic eruption.

• True

• False

• Volcanoes that form along a mid-ocean ridge occur at a diverging plate boundary.

• True

• False

A dormant volcano is erupting or may erupt in the near future.

• True

• False

The volcanoes along converging oceanic plate boundaries may form

• a hot spot

• a part of the mid-ocean ridge.

• an island arc

• a subducting plate.

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