North American societies before 1500: Ancestral Puebloans, Hohokam, Cahokia and the Haudenosaunee
Grade 7 Social Studies Worksheet

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Chaco Canyon (cards A to E; summaries in our words). Card A, Pueblo Bonito: its first section, about 50 rooms, was built in the 900s. It grew into the largest great house in the canyon, with at least 650 rooms covering almost 2 acres, and parts rose four stories. Card B, tree rings and timber: most of the beams used at Chaco were cut between 1033 and 1092, the peak of building. The timber came from about 200,000 conifer trees, mostly carried on foot from mountains up to 70 miles away. Card C, turquoise and roads: about 200,000 pieces of turquoise have been dug up at Chaco, and workshops made beads there; more than 15,000 beads and pendants lay with two burials at Pueblo Bonito. About six road systems linked the canyon to about 30 outlying sites; some roads ran up to 60 miles and were about 30 feet wide. Card D, the end of the system: Chaco was a major center from about 900 to 1150. The last great house, Wijiji, was built about 1110 to 1115. A 50-year drought began in 1130, the system began to unravel around 1140, and by the end of the century the central canyon buildings had been sealed and left. Card E, today: Hopi and Pueblo peoples regard these places as ancestral homelands and keep oral accounts of migration from Chaco. Since 1981 excavation at the park has been limited, an approach shaped by Hopi and Pueblo beliefs.
Card A: Pueblo Bonito began with about 50 rooms and grew to at least 650. About how many times as many rooms is that, Ari asks?
- About one thirteenth as many, since the early section was the smaller
- At least 13 times as many, since 650 divided by 50 is 13
- 600 times as many, since 650 minus 50 is 600
- About 50 times as many, since the first section had 50 rooms
Card D: Chaco was a major center about 900 to 1150. Card B: most beams were cut 1033 to 1092. What share of the 250 years is the 1033 to 1092 span, Bo asks?
- About 4 percent, since 59 divided by 250 is about 0.24
- About 24 percent, since 59 years is about a quarter of 250
- About 59 percent, the number of years in the span
- About 76 percent, the share of the 250 years outside the span
Card B: timber was carried on foot up to 70 miles. At a made-up pace of 14 miles a day, about how many days is that, Esme asks?
- 14 days, since the pace is 14 miles each day
- 56 days, since 70 minus 14 is 56
- 5 days, since 70 divided by 14 is 5
- 980 days, since 70 times 14 is 980
Card E says Hopi and Pueblo peoples keep oral accounts of migration from Chaco. What can such accounts add that tree rings cannot, Kira asks?
- The exact calendar year each room was built, to the day it was finished
- Nothing, since oral accounts are not evidence about the past
- Proof that the drought caused people to leave, which tree rings could not give
- Accounts from descendants of where people went and what the places mean
A student says, "The roads on card C prove Chaco's leaders ruled all 30 outlying sites." Which reply is best, Luz asks?
- Supported: a road system is built by a ruling power alone
- Not supported: roads cannot tell anything about a past society
- Not supported: roads show links, not who ruled the sites
- Supported: card C says the roads linked the canyon to about 30 sites
Card C: about 200,000 pieces of turquoise, workshops, and 15,000 beads with two burials. What does that suggest, Noah asks?
- Turquoise was brought to Chaco after the system unraveled in 1140
- Turquoise was worked at Chaco and buried with people, so it was valued
- Turquoise was a cheap material that the people of Chaco did not care about
- Each person at Chaco owned a thousand pieces of turquoise
Card D says Wijiji was built about 1110 to 1115 and Chaco was a major center until about 1150. What does that show, Pia asks?
- Wijiji was built after the system had fully unraveled
- Building stopped in 900, long before the system ended
- Building went on until about 1115, some 35 years before 1150
- The system ended in 1115, when the last great house was finished
Which sentence is best supported by cards D and E together, Ren asks?
- People left as the system unraveled, and descendants today keep accounts
- The drought of 1130 alone caused the move, so no other cause is possible
- The people of Chaco vanished without any trace or any descendants
- Chaco was left in 900, when its first rooms were built
Card B dates beams to 1033 to 1092. What does a beam date show about a room, Tala asks?
- The year the room was finished, to the day, with no room for doubt
- The year the tree began to grow, counted from the innermost ring
- The earliest year the room could have been built
- The year the room was left empty by the people who used it
Suppose a new study dates one room's beams to 1020. How does that fit card B's "most beams were cut between 1033 and 1092," Zee asks?
- It shows the card is wrong about Pueblo Bonito's first rooms
- It should be thrown out, since beam dates cannot be trusted
- It contradicts card B, since any date outside 1033 to 1092 is an error
- It fits, because card B says most beams, not all