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Questions and Answers
Lava is molten or partially molten ______ that has been expelled from the interior of a terrestrial planet onto its surface.
Lava is molten or partially molten ______ that has been expelled from the interior of a terrestrial planet onto its surface.
rock
A ______ is a funnel-shaped or bowl-shaped hollow at the top of the vent from where magma, ash and gas comes out.
A ______ is a funnel-shaped or bowl-shaped hollow at the top of the vent from where magma, ash and gas comes out.
crater
Calderas are formed by the ______ collapse of a volcano.
Calderas are formed by the ______ collapse of a volcano.
inward
The ______ chamber is the region beneath the vent of a volcano where molten rock or magma is deposited or stored before eruption.
The ______ chamber is the region beneath the vent of a volcano where molten rock or magma is deposited or stored before eruption.
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Volcanic ______ are often ejected with great force, can travel significant distances from the volcano before solidifying into various shapes and sizes.
Volcanic ______ are often ejected with great force, can travel significant distances from the volcano before solidifying into various shapes and sizes.
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An activity that includes the movement of magma towards or onto the surface of the ______ is called an eruption.
An activity that includes the movement of magma towards or onto the surface of the ______ is called an eruption.
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A ______ is a hill, mountain, or fissure from which molten rocks, hot gases, and ash are ejected.
A ______ is a hill, mountain, or fissure from which molten rocks, hot gases, and ash are ejected.
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The Philippines is home to many volcanoes and prone to ______ because of its location along the Pacific Ring of Fire.
The Philippines is home to many volcanoes and prone to ______ because of its location along the Pacific Ring of Fire.
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The type of magma with the least silica content is ______ magma.
The type of magma with the least silica content is ______ magma.
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Magma with a silica content of around 70% is classified as ______ magma.
Magma with a silica content of around 70% is classified as ______ magma.
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The ______ magma has the highest viscosity.
The ______ magma has the highest viscosity.
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Basaltic magma has the highest tendency to form ______.
Basaltic magma has the highest tendency to form ______.
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______ magma has the lowest tendency to form pyroclastic materials.
______ magma has the lowest tendency to form pyroclastic materials.
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Andesitic magma has an ______ tendency to form pyroclastic materials.
Andesitic magma has an ______ tendency to form pyroclastic materials.
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Granitic magma has the ______ tendency to form pyroclastic materials.
Granitic magma has the ______ tendency to form pyroclastic materials.
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The type of magma with an intermediate silica content is called ______ magma.
The type of magma with an intermediate silica content is called ______ magma.
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The ______ content of a magma is the percentage of silicon dioxide (SiO2) it contains.
The ______ content of a magma is the percentage of silicon dioxide (SiO2) it contains.
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Magma with the highest silica content has the highest ______ and the least tendency to form lava flows.
Magma with the highest silica content has the highest ______ and the least tendency to form lava flows.
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Basaltic magma has the ______ silica content, the lowest viscosity, and the highest tendency to form lava flows.
Basaltic magma has the ______ silica content, the lowest viscosity, and the highest tendency to form lava flows.
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Andesitic magma has ______ silica content and viscosity than basaltic magma, but ______ than granitic magma.
Andesitic magma has ______ silica content and viscosity than basaltic magma, but ______ than granitic magma.
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Granitic magma has the ______ silica content, the highest viscosity, and the least tendency to form lava flows.
Granitic magma has the ______ silica content, the highest viscosity, and the least tendency to form lava flows.
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A ______ volcano is characterized by its steep conical shape and is formed by layers of lava flows and pyroclastic materials.
A ______ volcano is characterized by its steep conical shape and is formed by layers of lava flows and pyroclastic materials.
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A ______ volcano is characterized by its broad, gently sloping shape and is formed by effusive eruptions of basaltic lava.
A ______ volcano is characterized by its broad, gently sloping shape and is formed by effusive eruptions of basaltic lava.
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A ______ volcano is a relatively small cone-shaped volcano that forms from ejected volcanic materials like ash, cinders, and bombs.
A ______ volcano is a relatively small cone-shaped volcano that forms from ejected volcanic materials like ash, cinders, and bombs.
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Mount Apo is located in the ______ of Cotabato.
Mount Apo is located in the ______ of Cotabato.
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Mount Kanlaon is also known as ______ or Canlaon.
Mount Kanlaon is also known as ______ or Canlaon.
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Mayon Volcano is an ______ stratovolcano.
Mayon Volcano is an ______ stratovolcano.
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Shield volcanoes are formed by less viscous ______ lava flows.
Shield volcanoes are formed by less viscous ______ lava flows.
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Sierra Negra Volcano is located on the ______ Islands.
Sierra Negra Volcano is located on the ______ Islands.
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Cinder cone volcanoes are ______ in comparison to other types of volcanoes.
Cinder cone volcanoes are ______ in comparison to other types of volcanoes.
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The term used to refer to any activity that includes the movement of magma towards or onto the surface is called an ______.
The term used to refer to any activity that includes the movement of magma towards or onto the surface is called an ______.
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______ cones are almost exclusively made up of loose fragments.
______ cones are almost exclusively made up of loose fragments.
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A volcano is a hill, mountain, or fissure from which molten rocks, hot gases, and ash are ejected. 'Volcano' also means a crater formed by the removal of preexisting materials, or a hill or mountain formed from the accumulation of ______.
A volcano is a hill, mountain, or fissure from which molten rocks, hot gases, and ash are ejected. 'Volcano' also means a crater formed by the removal of preexisting materials, or a hill or mountain formed from the accumulation of ______.
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The Philippines is home to several volcanoes due to its location in the Pacific Ring of ______.
The Philippines is home to several volcanoes due to its location in the Pacific Ring of ______.
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Any activity that includes the movement of magma towards or onto the surface is called ______.
Any activity that includes the movement of magma towards or onto the surface is called ______.
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Magma comes out of a ______, the central opening of a volcano.
Magma comes out of a ______, the central opening of a volcano.
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The Ring of Fire, also referred to as the Circum-Pacific Belt, is characterized by active volcanoes and frequent ______.
The Ring of Fire, also referred to as the Circum-Pacific Belt, is characterized by active volcanoes and frequent ______.
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When rocks become so hot, they can become a substance called ______.
When rocks become so hot, they can become a substance called ______.
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Volcanic openings or fissures, serve as pathways for the magma to reach the Earth's surface during volcanic ______.
Volcanic openings or fissures, serve as pathways for the magma to reach the Earth's surface during volcanic ______.
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Secondary vents, or also called '______', emit only gases.
Secondary vents, or also called '______', emit only gases.
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Volcanic openings or fissures serve as pathways for the magma to reach the Earth's ______ during volcanic eruptions.
Volcanic openings or fissures serve as pathways for the magma to reach the Earth's ______ during volcanic eruptions.
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Magma is an important material in volcanic ______.
Magma is an important material in volcanic ______.
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Volcanic eruptions are influenced by the type of ______, which also influences the resulting type of cone formed.
Volcanic eruptions are influenced by the type of ______, which also influences the resulting type of cone formed.
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The ______ resistance of fluids to flow is known as viscosity.
The ______ resistance of fluids to flow is known as viscosity.
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Basaltic magma has the ______ silica content compared to andesitic and granitic magma.
Basaltic magma has the ______ silica content compared to andesitic and granitic magma.
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Granitic magma has the ______ viscosity among the different types of magma.
Granitic magma has the ______ viscosity among the different types of magma.
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The tendency to form lava is ______ in basaltic magma.
The tendency to form lava is ______ in basaltic magma.
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Pyroclastic materials are most likely to form from ______ magma.
Pyroclastic materials are most likely to form from ______ magma.
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Flashcards
Volcano
Volcano
A landform where molten rocks, gases, and ash erupt through the Earth's surface.
Types of Volcanoes
Types of Volcanoes
Volcanoes can be classified by structure (shield, composite, or cinder cone) and activity (active, dormant, extinct).
Volcanism
Volcanism
The movement of magma towards or onto the Earth's surface, leading to eruptions.
Magma
Magma
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Eruption
Eruption
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Vent
Vent
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Fumaroles
Fumaroles
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Ring of Fire
Ring of Fire
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Lava
Lava
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Magma Chamber
Magma Chamber
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Crater
Crater
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Caldera
Caldera
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Volcanic Bombs
Volcanic Bombs
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Taal Lake
Taal Lake
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Volcanic openings
Volcanic openings
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Basaltic magma
Basaltic magma
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Andesitic magma
Andesitic magma
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Granitic magma
Granitic magma
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Viscosity
Viscosity
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Tendency to form lava
Tendency to form lava
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Tendency to form pyroclastic materials
Tendency to form pyroclastic materials
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Stratovolcano
Stratovolcano
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Mount Kanlaon
Mount Kanlaon
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Mayon Volcano
Mayon Volcano
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Shield Volcano
Shield Volcano
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Cinder Cone Volcano
Cinder Cone Volcano
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Volcanic Activity
Volcanic Activity
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Volcano Types
Volcano Types
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Lava Formation Tendency
Lava Formation Tendency
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Pyroclastic Materials
Pyroclastic Materials
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Highest Viscosity Magma
Highest Viscosity Magma
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Silica Content
Silica Content
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Volcano Classification
Volcano Classification
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Magma Viscosity
Magma Viscosity
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Study Notes
Volcanoes
- A volcano is a landform, a mountain, where molten rocks erupt through the Earth's surface.
- The volcano mountain opens downwards to a pool of molten rocks below the Earth's surface.
- The Philippines is home to several volcanoes due to its location in the Pacific Ring of Fire.
Pacific Ring of Fire
- The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes.
Volcanism
- Any activity that involves the movement of magma towards or onto the surface of the Earth is called volcanism.
- Volcanism occurs when underground molten rocks (magma) find a path through the lithosphere to the surface.
Parts of a Volcano
- Vent: Volcanic openings or fissures that act as pathways for magma to reach the Earth's surface during volcanic eruptions.
- Secondary vents (fumaroles): Emit only gases.
- Magma chamber: The region beneath the vent of a volcano where molten rock or magma is deposited or stored before eruption.
- Lava: Molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet onto its surface.
- Crater: Formed by outward explosions of rocks and other materials from a volcano; a funnel-shaped or bowl-shaped hollow at the top of a vent, where magma, ash, and gases come out.
- Caldera: Formed by the inward collapse of a volcano; usually more circular than craters.
- Volcanic bombs: Ejecta often ejected with great force, traveling significant distances before solidifying into different shapes and sizes.
Classifications of Magma
- Basaltic: Least silica content, highest tendency to form lava, least tendency to form pyroclastic materials
- Andesitic: Intermediate silica content, intermediate tendency to form lava & tendency to form pyroclastic materials
- Granitic: Most silica content, least tendency to form lava, highest tendency to form pyroclastic materials
Viscosity
- Resistance of fluids to flow.
- Affects magma's consistency.
Classifications of Volcanoes
- Stratovolcano: Tall and cone-shaped, built up by layering lava, ash, and tephra. Examples include: Mount Apo, Mount Canlaon, Mayon Volcano.
- Shield Volcano: Shaped like a shield, formed by less viscous basaltic lava flows. Example: Sierra Negra Volcano.
- Cinder Cone Volcano: Small compared to other types, very steep, typically with a bowl-shaped crater at the summit. They're made up of loose fragments, and can erode away quickly. Example: Mt Capulin.
Learning Outcomes
- Define a volcano.
- Describe different types of volcanoes.
- Explain what happens when volcanoes erupt.
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Description
Test your knowledge on volcanology with this quiz focused on key concepts related to volcanoes, eruptions, and magma. Explore the terminology and characteristics that define volcanic activity, including types of magma and the structure of volcanoes. Ideal for students studying geology or earth science.
