You are presented with the question "What becomes hot when exposed to a source of heat?" and the following answer choices: 
- rubber
 - wool
 - an object
 - copper
 - paper
 - sugar
 - the skin
 - our star

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.


 

    copper     