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Questions and Answers
What is formed when magma erupts through the Earth's surface?
What is formed when magma erupts through the Earth's surface?
What is the hollow top of a volcano called?
What is the hollow top of a volcano called?
What happens during an explosive volcanic eruption?
What happens during an explosive volcanic eruption?
Which type of volcano is no longer active and has not erupted for many years?
Which type of volcano is no longer active and has not erupted for many years?
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What substance cools to form volcanic rock?
What substance cools to form volcanic rock?
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Study Notes
Volcano Formation
- Magma, hot molten rock, collects in a chamber beneath the Earth's surface.
- Pressure builds, causing magma to erupt from a vent (opening or crack).
- Eruptions form volcanoes.
- Eruptions can be quiet (gentle lava flow) or explosive (violent lava flow).
- Erupted material, including rocks, ash, and lava, cools to form volcanic rock.
- The crater is the bowl-shaped hollow at the top of the volcano.
- Volcanic eruptions can sometimes be accompanied by earthquakes.
Types of Volcanic Activity
- Quiet eruptions involve gentle lava flow.
- Explosive eruptions involve violent lava flow.
Other Natural Disasters
- Extinct volcanoes are inactive after years.
- Tsunamis, a series of enormous waves, can be triggered by volcanic eruptions or landslides.
- Other natural disasters (besides earthquakes and Tsunamis) are discussed later in the text.
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Description
Explore the fascinating world of volcanoes, including how magma forms and erupts to create volcanic structures. Learn about the different types of eruptions, from quiet lava flows to explosive events, and discover the relationship between volcanic activity and other natural disasters like tsunamis. This quiz covers essential concepts in volcanology.
