Question 1
Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface?
◦ aa
◦ pahoehoe
◦ pegmatitic
◦ scoria
Question 2
Volcanic bombs originate ________.
◦ as blocks of volcanic rock ejected from an erupting volcanic crater
◦ as erupted magma blobs that partly congeal before falling to the ground
◦ as enormous blocks launched in a solid form from a volcanic plug
◦ as ash particles that join together in the eruptive plume and fall as cobble-sized objects