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1. What is the chemical symbol for salt?
2. What are the three layers of the earth?
3. What is the most abundant gas in the Earth’s atmosphere?
4. How many elements are there on the periodic table?
5. What does a bat use to navigate and locate prey?
6. Where is the ACL located?
7. In which war did the most American soldiers die?
8. How long is a marathon?
9. What does the “www” stand for at the start of website addresses?
10. How many millimeters are in a meter?
11. What is the chemical symbol for gold?
12. What is the rarest blood type among humans?
13. What animal are pearls found in?
14. Which kind of alcohol is Russia notoriously known for?
15. Which popular soft drink was originally created as a medicine in the 19th century?