21.
Which of the following is NOT a type of volcanic hazard?
A
Lava flows
B
Pyroclastic flows
C
Tsunamis
D
Earthquakes
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Which of the following is NOT a type of volcanic hazard?
Lava flows
Pyroclastic flows
Tsunamis
Earthquakes
What is the primary factor that determines the explosiveness of a volcanic eruption?
The temperature of the magma
The size of the volcano
The presence of water and gas in the magma
The depth of the magma chamber
Which type of volcano has the steepest slopes and is made up of alternating layers of lava and volcanic ash?
Shield volcano
Cinder cone volcano
Stratovolcano
Fissure volcano
What is magma?
Molten rock beneath the Earth's surface
Solid rock on the Earth's surface
Another name for lava
Gas emitted during a volcanic eruption
What is a volcano?
A deep pit in the ground
A mountain formed by the accumulation of volcanic ash and lava
A type of earthquake
A river of flowing lava