3.2 Notes Heat

3.2 Notes What is heat? What is NOT heat? -The transfer of energy between objects of different temperatures -Heat transfers from hot to cold until both temperatures of the different objects are the same. Once they are the same, there is no more heat.  What is NOT heat? - Heat does not always mean HOT (misunderstanding)

What is transferred first? The warm from your body to the stethoscope Or The cold from the stethoscope to your body

3.2 Notes There are 3 types of heat: Conduction – the transfer of heat by touch Convection – the transfer of heat through liquids Radiation – the transfer of heat through space (air)

3.2 Notes Conduction – the transfer of heat by touch A solid touching a solid A liquid touching a solid Anything touching a solid is conduction (i.e. – spoon touching a bowl, a soda can in ice water, lava touching the ground)

3.2 Notes Convection – the transfer of heat through liquids A liquid mixing with another liquid of different temperatures Must be two liquids of different temperatures in order for it to be convection (i.e. – boiling water mixed with cold water, a warm soda mixed with cold orange juice)

3.2 Notes Radiation – the transfer of heat through space (air) Air can change temperature in a liquid or solid. (i.e. – a heater heating a cool room, an air conditioner cooling a warm room, the sun heating a rock, the sun heating a car)

Can you think of more examples? Write down in your notes 3 more examples that we have not already talked about for each type of heat. Conduction Convection Radiation 1. 1. 1. 2. 2. 2. 3. 3. 3.