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Heat Transfer What do you know about heat transfer?

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Page 1: Heat Transfer What do you know about heat transfer?

Heat TransferWhat do you know about heat transfer?

Page 2: Heat Transfer What do you know about heat transfer?

HEAT TRANSFERThe transfer of ENERGY from one

object to another.

Page 3: Heat Transfer What do you know about heat transfer?

Radiation

The movement of energy through EMPTY SPACE

Page 4: Heat Transfer What do you know about heat transfer?

There are two other types of HEAT TRANSFER…

ConductionConvection

Page 5: Heat Transfer What do you know about heat transfer?

CONDUCTION

The direct transfer or movement of warmth and energy from one molecule to another molecule by collision.

Page 6: Heat Transfer What do you know about heat transfer?

CONDUCTION

THERMAL ENERGYHeat moves through SOLIDS by

conduction. There are actually VIBRATING MOLECULES that pass heat to other MOLECULES.

Page 7: Heat Transfer What do you know about heat transfer?

What is going to happen to the molecules?

Page 8: Heat Transfer What do you know about heat transfer?

CONVECTION

Hot fluids rise because they are less dense than cold fluids which sink. – Where on/in Earth can you find convection

currents?

Page 9: Heat Transfer What do you know about heat transfer?

CONVECTION Heat moves through GASES AND LIQUIDS (fluids)

through convection. Heated MOLECULES move away from HEAT!!! Cooler molecules replace them and become HEATED too!

When air is heated it ________. As it expands it becomes lighter and will ___________. Cooler air then sinks into its place.

Warm air rises because it is less __________ dense

expands

rise

Page 10: Heat Transfer What do you know about heat transfer?

What’s happening in this picture?

Page 11: Heat Transfer What do you know about heat transfer?

Can you explain how each type of HEAT TRANSFER works using this picture?

Page 12: Heat Transfer What do you know about heat transfer?

The sun heats the atmosphere… How do you think the sun heats the atmosphere using each type of heat

transfer?

Radiation

Conduction

Convection

Suns radiation travels through space. Suns energy reaches the Earth. Air molecules are heated by radiation.

The suns energy reaches land/water. The water becomes heated by convection

The land becomes heated by conduction.


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