3Q Reviewer in Science Part 1

The vent in Earth's crust is called ___________.

• Volcanoes

• Mountains

Volcanoes are formed through a process called __________ where one tectonic plate slides beneath the other.

• Convection

• Subduction

The type of volcano that is steep sided formed by explosive eruptions of ash, cinders, and dust. It ejects fragments of lava, and volcanic ash into the air like a fountain. Examples: Taal Volcano and Mt. Iriga.

• Cinder Cone

• Composite

The type of volcano that has steep upper slopes and relaxed lower slopes. It is formed by highly viscous (thick) slow-moving lava. Its eruption is both explosive and effusive. Examples: Mt. Fuji in Japan and Mt. St. Helens, USA.

• Composite

• Shield

The type of volcano that is broad, gently sloping volcanoes with a shape resembling a warrior's shield formed from layers of cooled lava. Its type of eruption is non-explosive, effusive eruptions without paring lava flows. Examples: Mt. Mauna Loa in Hawaii and Mt. Etna in Italy.

• Cinder Cone

• Shield

Volcano that exhibits volcanic activity within the last 10,000 years. Examples: Mt. Mayon in Albay, Mt. Taal in Batangas, and Mt. Pinatubo in Pampanga.

• Inactive

• Active

These are morphologically young volcanoes with no record of eruption within the last 10,000 years. Examples are Mt. Apo in Davao City and Mt. Arayat in Pampanga.

• Extinct

• Inactive

These are volcanoes with no record of eruption. Examples: Mt. Bigong in Zamboanga del Sur and Mt. Mapula in Laguna.

• Inactive

• Extinct

A natural phenomena which happens when ______ and ______ are discharged from a volcanic vent.

• lava and gas

• gas and volcanic cloud

The type of volcanic eruption that is least violent with highly fluid or runny lava flowing out several vents.

• Hawaiian

• Vulcanian