12 Questions
What is the name for the molten rock beneath the Earth's surface?
Magma
What geological feature is formed when magma solidifies beneath the Earth's surface?
Dyke
Which of the following is not a type of volcano as mentioned in the text?
Dormant volcano
What is the primary reason for the eruption of a volcano according to the text?
Rubbing of Earth's plates
Which of these is responsible for determining the explosiveness of a volcanic eruption?
The thickness of the magma
What do we call volcanic fragments that are larger than ash but smaller than blocks?
Lapilli
What is the name of the volcano that erupted in Italy in 79 A.D. and buried the city of Pompeii?
Mount Vesuvius
What is the molten rock called when it flows from a volcano during an eruption?
Lava
What causes the melting of rock, creating magma?
Friction of moving plates
Which type of volcano is cone-shaped and built of layers of pyroclasts with hardened lava layers in between?
Strato-volcano
How do geologists usually issue warnings before a volcano erupts?
By monitoring earthquakes
What determines the explosiveness of a volcanic eruption?
Thickness of the magma
Test your knowledge on the Earth's crust composition and volcanic eruptions with this multiple-choice quiz. From magma to tectonic plates, this quiz covers the essentials of what causes volcanic activity.
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