Podcast
Questions and Answers
What is the temperature of lava on average?
What is the temperature of lava on average?
- 1000 degrees Fahrenheit
- 2000 degrees Fahrenheit (correct)
- 2500 degrees Fahrenheit
- 1500 degrees Fahrenheit
What is the main cause of the explosive nature of lava?
What is the main cause of the explosive nature of lava?
- Presence of fluorine gases
- Dissolved rocks
- Gases present in the magma (correct)
- High iron content
Why does lava take several days to years to cool down completely?
Why does lava take several days to years to cool down completely?
- High extrusion rate
- Low viscosity
- The presence of dissolved gas (correct)
- The temperature of the flow
What forms when lava cools down after flowing from a volcano?
What forms when lava cools down after flowing from a volcano?
What are the two major components that make up lava composition?
What are the two major components that make up lava composition?
Which of the following statements about mafic lava is true?
Which of the following statements about mafic lava is true?
What is the primary factor that determines the morphology (form and texture) of a lava flow?
What is the primary factor that determines the morphology (form and texture) of a lava flow?
Which of the following is NOT a characteristic of felsic lava?
Which of the following is NOT a characteristic of felsic lava?
What is the primary difference between pahoehoe and aa lava flows?
What is the primary difference between pahoehoe and aa lava flows?
Which type of lava flow is associated with low-effusion eruptions?
Which type of lava flow is associated with low-effusion eruptions?
What is the defining characteristic of pahoehoe lava flows?
What is the defining characteristic of pahoehoe lava flows?
What is the origin of the term 'aa' used to describe a type of lava flow?
What is the origin of the term 'aa' used to describe a type of lava flow?
Which characteristic distinguishes aa lava flows from pahoehoe lava flows?
Which characteristic distinguishes aa lava flows from pahoehoe lava flows?
What is the defining characteristic of blocky lava flows?
What is the defining characteristic of blocky lava flows?
How do pillow lavas form?
How do pillow lavas form?
