When metal conducts heat , that metal expands, and metals have large specific heats, that is why they conduct heat well. Given these facts, why can metals expand among the following options:
- tectonic plates being pushed together
 - they are shiny
 - flow of electrons
 - matter vibrating
 - they have large specific heats
 - they are hard
 - they can rust
 - electron transport


 

     they have large specific heats    