Heat Transfer

Give an example of radiation.

• Feeling warmth from the sun on your skin.

• Hearing sound from a speaker.

• Seeing colors in a rainbow.

• Tasting food with your tongue.

What are the three main types of heat transfer?

• Conduction, convection, and radiation

• Conduction, evaporation, and condensation

• Convection, radiation, and sublimation

• Conduction, convection, and insulation

Define conduction.

• Conduction is the transfer of heat through direct contact between materials.

• Conduction is the movement of air in a fluid.

• Conduction is the process of converting energy into mass.

• Conduction is the transfer of heat through radiation.

What is a conductor?

• A material that allows heat to pass through easily, such as metals like copper.

• A material that prevents heat from passing through, such as rubber.

• A type of electrical device that stores energy.

• A substance that can only conduct electricity in liquid form.

What is an insulator?

• A material that conducts heat well, such as metal.

• A material that does not conduct heat well, such as wood or plastic.

• A material that absorbs heat, such as rubber.

• A material that reflects heat, such as glass.

What is the process observed when an ice cube melts on a hot surface?

• Convection, as heat is transferred through the movement of fluids.

• Radiation, as heat is emitted from the hot surface.

• Conduction, as heat is transferred from the hot surface to the ice cube.

• Evaporation, as the ice cube turns into vapor.

Give an example of conduction.

• A metal spoon getting hot when placed in a pot of boiling water.

• A fan blowing air to cool a room.

• Water boiling in a pot on the stove.

• Ice melting in a warm room.

What is the role of temperature difference in heat transfer?

• Temperature difference has no effect on heat transfer.

• Heat moves from areas of lower temperature to areas of higher temperature.

• Temperature difference drives heat transfer; heat moves from areas of higher temperature to areas of lower temperature.

• Heat transfer occurs only in liquids and gases, not in solids.

Define radiation.

• Radiation is the transfer of heat in the form of electromagnetic waves, such as sunlight.

• Radiation is the process of converting light into sound energy.

• Radiation is the movement of particles through a vacuum without any energy transfer.

• Radiation is the absorption of heat by solid objects.

What is heat transfer?

• Heat transfer is the movement of thermal energy from one object or substance to another due to a temperature difference.

• Heat transfer is the process of converting thermal energy into mechanical energy.

• Heat transfer refers to the increase in temperature of an object without any energy movement.

• Heat transfer is the transfer of energy through electromagnetic waves only.