Heat Transfer

Heat Transfer

Heat

the energy transferred from an object at a higher temperature to an object at a lower temperature.

Heat Transfer

HOT --> COLD!!!

Multiple Choice

How does heat transfer?

• Hot to cold

• Cold to hot

Three types of Heat Transfer

• Conduction

• Convection

• Radiation

Conduction

through DIRECT CONTACT!

conductor: transfers heat well (metal)

insulator: does not transfer heat well (wood, plastic, etc.)

Multiple Select

Which of the following are good conductors? (select all that apply)

• Copper

• Plastic

• Wood

• Steel

Convection

by the movement of a fluid (liquid or gas).

When a fluid is...

HEATED its particles SPEED UP and move APART,

making it LESS dense and RISE.

COOLED its particles SLOW DOWN and move TOGETHER,

making it MORE dense and SINK.

This creates a CONVECTION CURRENT

transferring heat throughout the fluid.

Convection

Radiation

by electromagnetic (EM) waves.

*This is the ONLY method of heat transfer that does NOT require matter (can travel in space)!*

Multiple Choice

What type of heat transfer is occurring between a hot cup of coffee in your hands?

• Conduction

• Convection

• Radiation

Multiple Choice

What type of heat transfer is occurring between a dog sunbathing?

• Conduction

• Convection

• Radiation

Multiple Choice

What type of heat transfer is occurring when a fireplace heats the air in a room?

• Conduction

• Convection

• Radiation