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WorksheetsMagma Types and Pyroclastic Material
Total questions: 32
Worksheet time: 11mins
Using context clues, determine the synonym for quiescent:
Fast
Explosive
Dangerous
Passive
The two (2) primary factors that determine how magma erupts are its:
Viscosity
Gas content
Proximity to the magma chamber
Mass
Color
Which substance is the most viscous:
Water
Coca-cola
Maple Syrup
Honey
A magma's viscosity depends primarily on its:
Temperature
Silica content
Color
Mass
Volume
In general, the more silica in magma, the ______________ its viscosity.
lower
greater
In general, the hotter the magma, the ______________ its viscosity.
lower
greater
As lava cools, the viscosity ________________ until the lava becomes a solid rock.
Increases
Decreases
Which of the following are the two most abundant gases in magma:
Water vapor
Carbon dioxide
Carbon monoxide
Nitrogen
Oxygen
Which of the following magmas has the highest silica content (~70%)
Basaltic
Rhyolitic
Andesitic
Which of the following magmas has the lowest silica content (~50%)
Basaltic
Rhyolitic
Andesitic
Which of the following is NOT a factor that determines how violently a volcano will erupt?
magma temperature
magma composition
magma dissolved gas amount
magma color
As magma rises toward the surface, the confining pressure ______________.
Increases
Decreases
What type of magma is responsible for the most violent volcanic eruptions?
Basaltic
Andesitic
Rhyolitic
Identify the phenomenon pictured above the volcano:
(a)
The type of magma with the lowest percentage of gas content:
Basaltic
Andesitic
Rhyolitic
The vast majority of Earth's lava, more than 90% of the total volume, is estimated to be:
Basaltic
Andesitic
Rhyolitic
Identify the type of lava flow:
(a)
(a)
Identify the type of lava flow:
(a)
What are the top 3 most abundant gases in magma?
Water vapor
Carbon dioxide
Sulfur dioxide
Hydrogen sulfide
Carbon monoxide
What is the name of pyroclastic material that is between 2mm and 64 mm in size?
ash
lapilli (cinder)
bombs
blocks
The type of magma with the highest temperatures:
Basaltic
Andesitic
Rhyolitic
larger pyroclastic materials (greater than 64 mm) made of hardened lava
Volcanic blocks
Volcanic bombs
Lapilli (cinder)
Ash
Pahoehoe flow
larger pyroclastic materials (greater than 64 mm) ejected as incandescent lava (glowing red semi-molten rock)
Volcanic blocks
Volcanic bombs
Lapilli (cinder)
Ash
Pahoehoe flow
Identify this pyroclastic material (2-64 mm)
Volcanic blocks
Volcanic bombs
Lapilli (cinder)
Ash
Pahoehoe flow
Which substance has the highest viscosity:
Biodiesel
Diesel
Canola oil
Which substance has the lowest viscosity:
Biodiesel
Diesel
Canola oil
Which of the following best describes the difference between magma and lava:
Magma has a darker color than lava
Magma has a hotter temperature than lava
Magma and lava are the same thing
Magma is located inside the Earth and lava is on the surface
Lava is located inside the Earth and magma is on the surface
Identify this pyroclastic material (greater than 64 mm)
Volcanic blocks
Volcanic bombs
Lapilli (cinder)
Ash
Pahoehoe flow
Identify this pyroclastic material (greater than 64 mm)
Volcanic blocks
Volcanic bombs
Lapilli (cinder)
Ash
Pahoehoe flow
Identify this pyroclastic material (smaller than 2 mm)
Volcanic blocks
Volcanic bombs
Lapilli (cinder)
Ash
Pahoehoe flow
Which of the following is an important distinction between magma and lava:
Magma is liquid and lava is solid
Magma and lava are the exact same thing
Magma is inside the Earth and lava is on the surface of the Earth
Lava is inside the Earth and magma is on the surface of the Earth
