Final answer:
Archaeologists differentiate Ancestral Puebloan and Hohokam artifacts by examining distinct patterns in pottery, stone building materials, and the presence of rectangular kivas.
Step-by-step explanation:
Archaeologists differentiate artifacts left by the Ancestral Puebloan and the Hohokam by looking for distinct patterns in pottery, as each culture had their own unique pottery designs. For example, the Ancestral Puebloans evolved from simple clay decorations to elaborate black-on-white pottery. Additionally, archaeologists can examine the building materials used by each culture, such as stone in the case of the Ancestral Puebloans and ceramics in the case of the Hohokam. Finally, the presence of rectangular kivas, which were ceremonial centers, can help identify Ancestral Puebloan sites.