In science class we have been learning about heat and matter. durring this unit I learned how a room is heated by convection, convection is when warm air rises and cold air sinks. Anouther thing that i have learned in this unit is that a conductor is a object that matter can Travel thought easily. The last thing that i have learned in this lesson is that when you cook a egg you are using conduction. The thing that i liked the most in this unit is that we did alot of experiments! what i liked least in this unit is that is was hard for me to understand is the difference between expanding and contraction. Whats an insulator?