SCIENCE 4-5

What is the driving force of volcanic eruption?

• 15% CO2

• 70% H2O

• 5% N

• 5% SO2

Which volcano is credited with producing the most audible sound in modern history?

• Mt. Pinatubo

• Krakatoa

• Olympus Mons

• Mt. Banahaw

What determines the explosiveness of a volcanic eruption?

• Bulging of the volcano

• Silica Content

• Dissolved gases in the magma

• Temperature of the magma

What is the biggest caldera in the world located in the Philippines?

• Mt. Pinatubo

• Krakatoa

• Mt. Banahaw

• Apolaki

Which eruption type is considered the most explosive and powerful of all eruptions?

• Plinian

• Vulcanian

• Strombolian

• Hawaiian

What agency monitors earthquakes and volcanic activities in the Philippines?

• JMA

• EMSC

• PHIVOLCS

• USGS

What is the type of eruption driven by explosive expanding steam resulting from cold water contacting hot rock or magma?

• Phreatic

• Phreatomagmatic

• Surtseyan

• Submarine

What is the type of energy produced due to the pressure and material content of a volcano?

• Wind Energy

• Hydropower Energy

• Solar Energy

• Geothermal Energy

What is used to measure the expansion of a volcano?

• Seismometers

• Thermometer

• Tiltmeter

• Gas Detectors

What is the cooling effect caused by volcanic ash blocking sunlight?

• Increase in seismic activity

• Volcanic ashes carried out in the atmosphere

• Cooling effect due to ash suspended in the sky

• Pyroclastic debris thrown out from the vent