Volcanic Eruptions
When a volcano ejects acid lava, the eruption is usually
light and less violent
soft and less violent
loud but less violent
loud and more violent
loud and more violent
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The divergence of plates allows magma from the mantle to reach the surface as:A. ice
B. rocks
C. lava
D. stones
The greater the amount of silica, the higher the:
A. volatility
B. viscosity
C. density
D. conductivity
At the same subduction zone, magma may erupt onto the Earth’s surface as:
A. rocks
B. stones
C. lava
D. ocean bed
Volcanoes that erupt frequently are known as:
A. Active volcanoes
B. Dormant volcanoes
C. Extinct volcanoes
D. Instinct volcanoes
A reference to the process by which materials such as magma and gases from inside the Earth are forced onto the Earth’s surface is:
A. Eruption
B. Lava
C. Volcanism
D. Earthquake
During eruption, the volcanic material is:
A. blown to some meters
B. blown to many kilometers
C. blown to some inches
D. blown to some feet
When the volcanos ejects basic lava, the eruption is mainly:
A. loud
B. violent
C. quite
D. hard
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