Across
- 2. Today, we have clocks and watches _____.
- 6. The lines in the ____ told them the time.
- 8. Even now, clocks and watches are ________.
- 9. This is the result of many great______.
- 10. The clock told us the hour with ________.
- 11. At first, they used ____ to power these clocks.
Down
- 1. About 700 years ago, people started to make ____clocks.
- 3. We cannot really see time, but ancient people tried to _____it.
- 4. Eventually, people began to ____watches.
- 5. The _____ were small and light.
- 7. Now it is time to recognize the ____of those ancient people.