ENERGY TRANSFER.

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Presentation transcript:

ENERGY TRANSFER

ENERGY TRANSFER THERE ARE THREE DIFFERENT WAYS THAT ENERGY IS TRANSFERRED. CONDUCTION CONVECTION RADIATION

ENERGY TRANSFER If there is a temperature difference in a system, heat will naturally move from high to low temperatures.

HEAT WHAT? Heat source - The place you find the higher temperature is the heat source Heat sink - The area where the temperature is lower is the heat sink

CONDUCTION THE TRANSFER OF HEAT DUE TO DIRECT CONTACT. Ex. THE BURNER ON THE STOVE AND A FRYING PAN.

Conduction The heat source and heat sink are touching.

CONVECTION THE UP AND DOWN CIRCULAR MOVEMENT OF GASES AND LIQUIDS CAUSED BY HEAT TRANSFER

CONVECTION WHY CONVECTION HAPPENS HOT AIR IS LESS DENSE- SO IT RISES COLD AIR IS MORE DENSE – SO IT SINKS There is a lot of movement in convection.

CONVECTION HOT RISES COLD SINKS

CONVECTION HAPPENS CONVECTION IS HAPPENING ALL OVER THE PLANET. HERE ARE A FEW: THE AIR OCEANS IN A HOUSE IN A CUP OF HOT CHOCOLATE INSIDE THE EARTH

RADIATION WHEN ELECTROMAGNETIC WAVES COME IN CONTACT WITH AN OBJECT THE WAVES TRANSFER THE HEAT TO THAT OBJECT. Energy that travels and spreads out as it goes.

RADIATION 2 EVERYDAY EXAMPLES. THE MICROWAVE

RADIATION EVERYDAY EXAMPLE THE SUN

Everyday Energy Transfer Come up with 5 different ways that energy transfer occurs in your home?

POPCORN ENERGY USING POPCORN TO DEMONSTRATE THE THREE TYPES OF ENERGY TRANSFER CONDUCTION – JIFFY POP ON THE STOVE

POPCORN ENERGY AIR POPPED POPCORN CONVECTION

POPCORN ENERGY MICROWAVE POPCORN RADIATION