Conduction Convection Radiation

Conduction Convection Radiation

By Bernard Zdancewicz

Heat is transferred by direct contact.

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Example: ​flame is in contact with pan. Handle is in contact with hand.

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Can you think of other examples?

Conduction

Hot and cold air or water move through convection currents.​

​Hot air or liquid rises, and cooler air or water sinks.​

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This is why it is warmer upstairs!

Convection

Energy transferred by electromagnetic radiation.

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Examples: you do not need to touch a fire to feel the heat.​

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You can roast marshmallows without touching the fire!

Radiation

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Multiple Choice

The heat from the sun on a summer day.

• Conduction

• Convection

• Radiation

Multiple Choice

Walking barefoot on the sidewalk

• Conduction

• Convection

• Radiation

Multiple Choice

Air circulating from the ventilation system

• Conduction

• Convection

• Radiation

Multiple Choice

Air circulating from the ventilation system

• Conduction

• Convection

• Radiation

Multiple Choice

Holding a snowball

• Conduction

• Convection

• Radiation

Multiple Choice

Food cooking in a pan on a stove

• Conduction

• Convection

• Radiation

Multiple Choice

Putting cheese on a hot hamburger

• Conduction

• Convection

• Radiation

Multiple Choice

Spagetti boiling in a pot of water

• Conduction

• Convection

• Radiation

Multiple Choice

A heat lamp keeping food warm.

• Conduction

• Convection

• Radiation

Multiple Choice

Grabbing a metal spoon that is in boiling water.

• Conduction

• Convection

• Radiation

Multiple Choice

Energy from the sun is:

• Absorbed in the atmosphere

• Reflected back to space

• Absorbed into the ground

• Lost in space

• All of these are true