1) SI system of Units. Learn the 7 major units corresponding to the 7 Fundamental Quantities in the physical world. 

a) Length

b) Mass

c) Time

d) Electric Current

2) Conceptual Difference between Mass and Weight . 

3) Parallax error in measurements.

4) Errors in measurements

5) Vernier Caliper, Least Count, and how it is used to measure diameter, width, and depth in a practical machined part.

6) Solved Problems