Physics

5. the discoverer of a pendulum.
7. the instrument used to measure mass.
8. the fixed known quantity used to measure something.
10. every measurement has two parts-a unit and ______.
12. the error that occurs when the eye is not positioned correctly during measurement by a ruler.
13. the S.I unit of length.
14. the fixed time taken by a pendulum to complete one to-and-fro motion.

1. the S.I unit of mass
2. the instrument that is used to measure the length of a curved line.
3. the S.I unit of time.
4. it is the length of a elbow to the tip of a middle finger.
6. those who were the first to come up with the smaller units of time.
9. the longer unit of time that was given by the cycle of seasons caused by the revolution of the Earth.
11. The instrument which is used to measure length.
13. it is the amount of matter an object contains.