- Metals usually have higher / greater conductivity than nonmetals
- Metal is an electrical  conductor
- Therefore, conductivity can be used to identify metals

Hence, conductivity can be used to identify metals
Question
A student is given three identically sized blocks. Each block is made of a different material. What characteristic of the blocks should be examined to find out which block is made of metal?

Context
- Metals usually have higher / greater conductivity than nonmetals 
- Metal is an electrical  conductor