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Carmen Harper
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Heat Transfer Notes
Added Jan 22, 2019
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so in this unit we talked a lot about heat and thermal energy you just did a stations lab about he transferred about three forms of heat transfer conduction convection radiation so let's take some notes just to summarize what we learn from that stations lab you will need this note sheet so the first form is conduction surprise right connection at that time conduction is the transfer of thermal energy by collisions between particles in matter another word that happens through direct contact and that's really helpful as you can remember conduction has a demon modulus direct contacts OD and conduction the D in correct indirect contact so you might want to write that somewhere on your page to help you remember but this occurs in solids liquids and gases touching off the handle of the pot to your hand so what you need to do is either write or draw an example in the box at the bottom so conduction direct contact is our first way of transferring Heat second option this is the transfer of thermal energy in a liquid or gas by the movement of warmer and cooler from place to place another words warm air rises while cooler air sinks to create a convection current just remember convection direction direction direction direction direction to help you remember that this happens in liquid or solid and you'll get the warm warm water going up in the cool air or water going down and get this nice little circuit going on an example this is boiling water the boiling water will be up at the bottom and add that water heats up it rises to the top then begins to cool it'll settle back down warm up at the bottom rise to the top settle back down they always have cool going down a third and final way to transfer heat is radiation and it's the transfer of thermal energy by electromagnetic waves this happens and gases like air and space so it is warming Yourself by the fire you don't actually have to touch you can just be around it in the heat radiates off of that so that's our third form of heat transfer again conduction think direct contact convection Direction that's where the heat goes up and finally radiation it radiates out in every direction everything we need to talk about or insulators and conductors so these notes down insulators these things do not allow heat to pass through them easily these things such as would you use to help prevent you getting burned for instance the heat Escape water cooler or a thermos thermos like Superman or even handle these are typically made of wood or some plastic coffee mugs is actually got are in between two metal tubes are that insulates the heat so it keeps hot things hot and cold it doesn't let the hot air from outside get to your cold beverage such as your sweet tea set a note is connectors and they're the opposite in slider so allow Heat cook with pots and pans cuz they threw that pot and pan to get to your food so that's the difference between insulators and nursery songs temples of conduction convection and radiation first conduction conduction or thinking D for direct contact so this is where he is going to touch kittens going to keep going to pass through those two things touch it sew in cooking food curling or straightening hair using that curler that straightener that heats up and next direct contact with your hair is also action directions to you're looking for those Direction arrows so fear the hot air rises from the radiator the floor water water is heated at the bottom of the ocean fires in a microwave actually uses radiation to cook our food and convection radiation examples of insulators and conductors and insulators do not laugh to pass through conductors do allow to pass through so any type of metal that's going to be a conductor and that's the reason why we use metal to Cooks Foods jacket the reason why we wear jackets keep our body heat close to our body instead of scaping conductor conductor insulator this crazy life Carolina very good this year that's okay into my doctor Pepper the metal that is a conductor so it allows us to cool that dr. pepper really fast using a cooler or refrigerator that's the reason why we use styrofoam Slater surf chocolate and they are the he's going to stay in the hot chocolate to your hand so insulators and conductors insulators conductors.
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Carmen Harper
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