You are presented with the question "what happens to copper if exposed to heat?" and the following answer choices: 
- contamination
 - produces electricity
 - It expands
 - becomes hot
 - they bend
 - becomes cold
 - vibrates
 - anemia

Now knowing that if a thermal conductor is exposed to a source of heat then that conductor may become hot and copper is a great thermal conductor, choose the best answer.


 

    becomes hot     