Final answer:
Both pahoehoe and aa lava can come from the same volcano. Pahoehoe lava has lower viscosity and hardens into a rippled surface, while aa lava hardens into rough chunks.
Step-by-step explanation:
Both pahoehoe and aa can come from the same volcano. Pahoehoe lava has lower viscosity compared to aa lava. The lower viscosity of pahoehoe lava allows it to flow easily and harden into a rippled surface. On the other hand, aa lava has higher viscosity, causing it to harden into rough chunks.