SCIENCE 10 - Volcanism

Which of the following is a characteristic of a volcano?

• It is a stationary opening in the Earth's surface.

• It is an opening where magma, gases, and ash can escape.

• It is a permanent feature formed only by explosive eruptions.

• It only emits lava, not gases.

What type of volcano is formed by low viscosity, runny lava that spreads far from the source?

• Stratovolcano

• Shield volcano

• Cinder volcano

• Lava dome

Which type of eruption is characterized by the release of fine ash into the air with great force?

• Phreatomagmatic

• Vulcanian

• Strombolian

• Hawaiian

Which volcano is known as the most active in the Philippines?

• Mt. Kanlaon

• Mt. Taal

• Mayon Volcano

• Mt. Pinatubo

What is the term for a mixture of rock, mineral, and glass particles expelled during a volcanic eruption?

• Lava

• Pyroclast materials

• Lahar

• Magma

A large depression formed when a volcano erupts and collapses is known as?

• Crater

• Lava dome

• Caldera

• Magma chamber

Which of the following is NOT a volcanic hazard?

• Pyroclastic flow

• Lahar

• Earthquakes

• Water vapor

What is the primary factor that influences the explosiveness of an eruption?

• Size of the volcano

• Composition of the lava

• Location of the volcano

• Time of eruption

What type of volcano has steep sides and is primarily formed by viscous, sticky lava?

• Stratovolcano

• Shield volcano

• Cinder volcano

• Lava dome

What does the term "phreatic eruption" describe?

• An eruption driven by magma pressure.

• An eruption caused by groundwater heating.

• A lava fountain eruption.

• A caldera-forming eruption.