Heat Transfer = Moving heat from one place to another.
Example - Fire can spread from one place to another.
Example - An air conditioner can spread heat through out your house.
Conductor of heat = Can pass on heat from one thing to another.
Example - A human can pass heat on if near each other.
Example - A blanket can pass on heat f you wrap it around you.
Insulator of heat = It doesn't pass on heat.
Example - Your house can keep its heat because of the pink stuff inside the walls.
Example - Wood can keep its own heat.
Convection = Neat transfer without contact
Example - It moves because the hot air rises so it becomes less dense and cold air sinks as more dense.
Today in BIO we burned the outer layer of a tea bag, we threw the insides and put the wrapper of the tea bag on a heat mat. We lit a match and put it on the tea bag and it slowly rised up into the air. It did go down a couple of seconds later because it cooled down. The tea bag got lighter (less dense) due to the hotness of the fire, it went down because as the fire went out it got colder so it got more heavier (dense).
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