Insulators, Conductors, & Heat Transfer

What is an insulator?

• A material that allows heat and electricity to pass through easily.

• A material that does not allow heat or electricity to pass through easily.

• A type of conductor that enhances electrical flow.

• A substance that increases thermal conductivity.

Why are metals used in cooking utensils?

• They are lightweight and easy to handle.

• They are good conductors of heat, allowing for even cooking.

• They are non-reactive with food.

• They are inexpensive and widely available.

What is a conductor?

• A material that allows heat or electricity to pass through easily.

• A material that prevents heat or electricity from passing through.

• A type of insulation used in electrical wiring.

• A device that generates electricity from heat.

Give an example of convection.

• Boiling water, where hot water rises and cool water sinks.

• Heating a metal rod in a flame.

• Ice melting in a warm room.

• A fan blowing air in a room.

Give an example of radiation.

• The heat you feel from a campfire without being in direct contact with it.

• The sound of a bell ringing from a distance.

• The light from a lamp that you can see but not feel.

• The wind blowing on your face.

How does heat transfer in fluids?

• Through conduction

• Through radiation

• Through convection

• Through insulation

What is conduction?

• The transfer of heat through direct contact between materials.

• The movement of heat through fluids without direct contact.

• The process of heat transfer through radiation.

• The conversion of heat energy into mechanical energy.

What is convection?

• The transfer of heat through the movement of fluids (liquids or gases).

• The process of heat transfer through direct contact between materials.

• The transfer of heat through electromagnetic waves.

• The movement of air caused by temperature differences.

Give an example of conduction.

• Touching a hot stove and feeling the heat transfer to your hand.

• Boiling water in a pot on the stove.

• Using a microwave to heat food.

• Feeling the warmth of the sun on your skin.

What happens to air when it is heated?

• It becomes more dense and sinks.

• It becomes less dense and rises, creating convection currents.

• It remains the same and does not change.

• It cools down and contracts.