Fact 1: If a thermal conductor is exposed to a source of heat then that conductor may become hot.

Fact 2: Copper is a great thermal conductor.

Given the two facts above, answer the question "What becomes hot when exposed to a source of heat?" with the following options: 
- rubber
 - wool
 - an object
 - copper
 - paper
 - sugar
 - the skin
 - our star


 

    copper     