Across
- 3. quantities that can be measured
- 5. works only during the day
- 7. distance covered by a moving object in unit time
- 8. standard unit of length
- 9. one that is uniformly used by everyone
Down
- 1. measures short intervals of time accurately
- 2. to-and-fro movement about its mean position
- 4. weight hung from a string
- 6. instrument used to give distance travelled in kilometers