POST_TESTPhilippine Volcanoes, Earthquakes, and Tsunamis Quiz

Which of the following is an accurate description of an inactive volcano in the context of Philippine volcanic classification?

• Erupted in the past century and is currently showing significant ground deformation

• Experiencing minor volcanic tremors and occasional steam emissions

• No recorded eruptions and its form has been intensely weathered and eroded forming deep and long gullies

• No recorded eruptions in the last 10,000 years and its form is young (i.e. low degree of erosion, young vent features)

Which of the following is a characteristic feature of a shield volcano?

• Broad, gently sloping sides

• High viscosity lava resulting in steep slopes

• Small, steep-sided cones formed by explosive eruptions

• Steep, conical profile built up by layers of lava and ash

An earthquake is the shaking of the ground caused by sudden motion along faults, or fractures in the Earth's crust. What is the term used to describe the point within the Earth where an earthquake rupture starts?

• Fault

• Plate

• Focus

• Epicenter

Seismic waves are vibrations that travel through the Earth carrying the energy released during earthquakes. Which among the statements is TRUE about primary waves?

• It is parallel to the surface and perpendicular to wave direction.

• It can travel in any solids, liquids, and even gases.

• It can travel only in solids materials.

• It can travel as ripples with motions that are similar to those of waves on the surface of water.

What is a Tsunami?

• A large ocean wave caused by strong winds.

• A series of ocean waves caused by a large and sudden displacement of water.

• A tidal wave caused by the gravitational pull of the moon.

• A hurricane that forms over the sea.

Which of the following is a natural sign that a tsunami might be approaching?

• An unusually low tide.

• Sudden and strong winds.

• Dark clouds gathering in the sky.

• Increased animal activity.

What are the two types of tsunami information provided by the Philippine Institute of Volcanology and Seismology (PHIVOLCS)?

• Tsunami Alert and Tsunami Watch

• Tsunami Warning and Tsunami Advisory

• Tsunami Forecast and Tsunami Notice

• Tsunami Alert and Tsunami Forecast

The earth is composed of four chemical layers. This chemical layer is made of solid iron and nickel and is considered as the innermost and the hottest layer of the earth. It also plays an important role in generating the earth's magnetic field.

• Crust

• Mantle

• Outer Core

• Inner Core

Continental Drift Theory explains that the earth was once a single supercontinent called Pangaea which drifted apart forming the seven continents that we have today. Who is the major proponent of this theory?

• Alfred Wegener

• Andrija Mohorovicic

• Samuel Warren Carey

• Sir Harry Hammond Hess

The Philippines is home to about thirty active fault systems where earthquakes may develop. What is the most active and the most hazardous fault in the nation?

• Tablas Fault

• North Bohol Fault

• Central Philippine Fault Zone

• Marikina Valley Fault System