Explain why it takes longer to cook a large cheese pizza (400g) than it does to cook a small cheese pizza (150g). Justify your answer with information on the relationship between the mass and thermal energy needed to change the temperature of an object. In your answer be sure to include:

Definition of thermal energy
Explanation of what needs to happen to the molecules of the pizza in order to increase the temperature
Relationship between mass and thermal energy needed to change the temperature