A steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening. There are dissolved gasses in magma chamber, causing an explosive eruption.

A tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials. This type of volcano typically has explosive eruptions.

A mound of viscous lava that has been extruded from a volcanic vent.

This is a liquid's resistance to flow.

Molten rock that reaches the Earth's surface

Molten rock beneath the Earth's surface, includes dissolved gases and crystals.

A dense, destructive mass of very hot ash, lava fragments, and gases ejected explosively from a volcano and typically flowing downslope at great speed.

A volcanic eruption with fluid, low viscosity lava. Typical of Shield Volcanoes

A violent and unpredictable eruption— the result of magma that is thicker & more viscous, and higher in gas content. Produces Composite volcanoes & Lava domes

Volcanoes are located

Morro Rock is an example of a