Here are the factual questions from the passages:
1. According to passage 1, when was the first dental school opened in the United States? (4)
- The first dental school was opened in Baltimore, Maryland in 1840.
2. According to passage 1, what gas was used by dentist Horace Wills in 1844 to reduce pain during tooth extractions? (6)
- Horace Wills had patients inhale the gas nitrous oxide just before having a tooth pulled to reduce pain.
3. According to passage 2, what type of tissue are deer antlers made of? (11)
- Deer antlers are made of bone, not horn, and are live, growing tissue.