Time

  1. How is time measured? [answer]
  2. What is meant by Universal Time? [answer]
  3. How many time zones are there in the world? [answer]
  4. Who establishes the correct time in the United States? [answer]
  5. What is military time? [answer]
  6. What do the initials a.m. and p.m. mean? [answer]
  7. When is Daylight Savings Time observed in the United States? [answer]
  8. What is a leap second? [answer]
  9. What is the exact length of a calendar year? [answer]
  10. Where did the term "grandfather clock" come from? [answer]
  11. What were the longest and shortest years on record? [answer]
  12. Besides the Julian and Gregorian calendars, what other calendars have been used? [answer]
  13. When does leap year occur? [answer]
  14. When did January 1 become the first day of the new year? [answer]
  15. How were the months of the year named? [answer]
  16. Where do the names of the days of the week come from? [answer]
  17. Why are the lengths of the seasons not equal? [answer]

Weights And Measures

  1. What is the metric system of measurement? [answer]
  2. What are the U.S. and metric units of measurement for area? [answer]
  3. How did the yard as a unit of measurement originate? [answer]
  4. What is a bench mark? [answer]
  5. How was the length of a meter originally determined? [answer]
  6. How are U.S. customary measures converted to metric measures and vice versa? [answer]
  7. What is the difference between a short ton, a long ton, and a metric ton? [answer]
  8. Why is a nautical mile different from a statute mile? [answer]
  9. What are the equivalents for dry and liquid measures? [answer]
  10. What are U.S. and British measures for volume and weight of water? [answer]