Podcast
Questions and Answers
What is the main way that volcanic terrain is built up?
What is the main way that volcanic terrain is built up?
- By slow accumulation of erupted lava (correct)
- By folding and faulting of the Earth's crust
- By uplift of the Earth's crust
- By erosion of the Earth's surface
What connects the volcanic vent to the storage areas of molten rock (magma) beneath the surface?
What connects the volcanic vent to the storage areas of molten rock (magma) beneath the surface?
- Erosion of the Earth's surface
- Cracks within and beneath the volcano (correct)
- Faults in the Earth's crust
- Volcanic ash deposits
What is the key difference between magma and lava?
What is the key difference between magma and lava?
- Magma is made of molten rock, crystals, and dissolved gas, while lava is just molten rock
- Lava is made of molten rock, crystals, and dissolved gas, while magma is just molten rock
- Magma is found below the Earth's surface, while lava is found on the surface (correct)
- Lava is hotter than magma
What is the main chemical composition of magma?
What is the main chemical composition of magma?
Why do volcanoes eventually become unstable and collapse?
Why do volcanoes eventually become unstable and collapse?
What is the primary driving force that causes magma to move towards the Earth's surface?
What is the primary driving force that causes magma to move towards the Earth's surface?
Which of the following best describes the process of magma erupting as tephra?
Which of the following best describes the process of magma erupting as tephra?
What is the process described for analyzing the mineral composition of lava samples?
What is the process described for analyzing the mineral composition of lava samples?
Approximately how many potentially active volcanoes are there worldwide, according to the text?
Approximately how many potentially active volcanoes are there worldwide, according to the text?
Which of the following statements about Kīlauea volcano is true, based on the information provided?
Which of the following statements about Kīlauea volcano is true, based on the information provided?
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