Fact 1: If heat is conducted to an object then that object will become hot.

Fact 2: Metals vary in their capacity to conduct heat.

Given the two facts above, answer the question "What can happen if a metal is heated?" with the following options: 
- change chemical composition
 - refract energy
 - they bend
 - It expands
 - electricity
 - Relieve pain
 - maintains core temperature
 - becomes hot


 

        becomes hot 