1.02 A system of units

Most scientist use the SI units. This is an international system of units for each physical quantity. In was implied to make the meaning of numbers universal.

 

The SI units you need to know for now are

Learn the following prefixes by heart. They can be put in front of any SI unit

 

 

 

 

 

 

 

 

 

 

 

 

SI unit of mass

 

 

 

 

 

 

 

 

 

 

 

 

 

SI unit of length