Lava Flow Subtopics

What type of lava flow has a smooth, ropy surface?

• Lava

• Aa

• Pahoehoe

• Ropy

Which lava flow type has a rough, jagged surface?

• Aa

• Smooth

• Pahoehoe

• Blocky

What is the Hawaiian term for smooth, ropy lava flow?

• Lava

• A'a

• Pahoehoe

• Kilauea

Which type of lava flow is more viscous, pāhoehoe or ʻaʻā?

• Pillow

• ʻaʻā

• Blocky

• Pele's tears

What causes pāhoehoe lava to form?

• Low viscosity of basaltic lava

• Extreme heat in the surrounding environment

• Presence of water in the lava

• High viscosity of basaltic lava

What is the Hawaiian term for rough, jagged lava flow?

• Lava tube

• Pahoehoe

• Kipuka

• A'a

Which type of lava flow moves faster, pāhoehoe or ʻaʻā?

• Pillow

• Blocky

• Pele's tears

• ʻAʻā

What is the typical temperature range of pāhoehoe lava?

• 500 to 600 degrees Celsius (932 to 1,112 degrees Fahrenheit)

• 800 to 900 degrees Celsius (1,472 to 1,652 degrees Fahrenheit)

• 1,100 to 1,200 degrees Celsius (2,012 to 2,192 degrees Fahrenheit)

• 1,300 to 1,400 degrees Celsius (2,372 to 2,552 degrees Fahrenheit)

How does the viscosity of ʻaʻā lava compare to pāhoehoe lava?

• Pāhoehoe lava has higher viscosity than ʻaʻā lava.

• ʻaʻā lava and pāhoehoe lava have the same viscosity.

• ʻaʻā lava has higher viscosity than pāhoehoe lava.

• Viscosity is not a factor that distinguishes ʻaʻā lava from pāhoehoe lava.

What geological feature is often associated with pāhoehoe lava flows?

• Lava tubes

• Craters

• Glaciers

• Fault lines