Q3 M1 - DIFFERENT TYPES OF VOLCANOES AND VOLCANIC ERUPTIONS

Which of the following is an active volcano in the Philippines?

• Apo in Davao
• Isarog in Camarines Sur
• Bagacay in Camarines Norte
• Taal Volcano in Batangas

Why does a thick layer of volcanic ash can be heavy enough to collapse the roofs of buildings? It is because ash ________.

• is solid
• cannot be blown by winds
• becomes heavier as it cools
• consists of tiny fragments of rocks that becomes heavy as they pile up

Which of the following factors associated with huge volcanic eruptions may cause the decrease in the Earth’s average temperature for a few years?

• heat
• light
• acid rain
• volcanic ash

Which of the following characteristics of a volcano depends on its magma emission?

• age
• location
• size
• shape

Which characteristic of magma mainly determines its explosiveness?

• amount
• color
• temperature
• silica content

Aside from Mayon Volcano, what other Philippine volcano has erupted recently?

• Bulusan
• Canlaon
• Pinatubo
• Taal

What causes a shield volcano to be shaped like a broad dome? It is formed from ______________.

• the emission of lava
• ejected lava fragments
• molten magma which has high silica content
• alternate solidification of lava and pyroclastic deposits

Which of the following describes a Plinian volcanic eruption?

• a periodic weak to violent eruption characterized by lava fountain
• stream-driven eruption as the hot rocks come in contact with water
• excessively explosive type of eruption of gas and pyroclastic materials
• characterized by tall eruption columns that reach up to 20 km high with pyroclastic flow and ashfall tephra

Which property of a material refers to the material’s resistance to flow?

• heat
• pressure
• temperature
• viscosity

Which is NOT an external part of a volcano?

• base
• crater
• slope
• summit