Lava Flow Quiz

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What is the main factor that determines the behavior of lava?

Temperature

Chemical composition (correct)

Distance from the volcanic vent

Viscosity

Which type of lava has low amounts of silica and high amounts of magnesium and iron?

Intermediate lava

Pillow lava

Mafic lava (correct)

Felsic lava

What is the main reason for the difference in viscosity between mafic and felsic lava?

Temperature

Distance traveled from the volcanic vent

Chemical composition

Silica content (correct)

Which minerals are commonly formed by felsic lava?

Orthoclase, quartz, plagioclase Signup and view all the answers

What type of lava flow is characterized by a smooth and shiny surface, often with ropey textures?

Pahoehoe lava flow Signup and view all the answers

What is the temperature of lava?

Over 2000 degrees Fahrenheit Signup and view all the answers

What is the major cause of the explosive nature of lava?

Dissolved gas Signup and view all the answers

What is the major component of lava?

Oxygen Signup and view all the answers

What does the term 'magma' refer to when inside the Earth's crust?

Molten rocks Signup and view all the answers

What factor determines the distance that lava flows?

Temperature of the flow Signup and view all the answers

What type of lava flow is associated with mafic lava?

Aa lava flow Signup and view all the answers

Which type of lava flow forms smooth blocks of around one meter?

Blocky lava flow Signup and view all the answers

Under what conditions are pillow lavas typically formed?

Underwater eruption Signup and view all the answers

What are the characteristics of pahoehoe lava flows?

Low viscosity, slightly hotter, and smooth surface Signup and view all the answers

What distinguishes blocky lava flows from other types of lava flows?

High silica content Signup and view all the answers

Lava Flow Quiz

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