Heat Transfer

What is an example of convection?

• The warm air rising from a heater, creating a cycle of warm and cool air.

• Water boiling in a pot on the stove.

• Ice melting in a glass of warm water.

• A fan blowing air across a room.

What is thermal equilibrium?

• A state where two objects have the same temperature and no heat flows between them.

• A condition where heat continuously flows between two objects.

• A situation where one object is hotter than the other.

• A state of matter where all particles are at rest.

Define conduction.

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

• Conduction is the movement of heat through fluids without direct contact.

• Conduction is the process of heat transfer through radiation.

• Conduction is the transfer of heat through the movement of air.

In which direction does heat flow?

• Heat flows from a colder substance to a hotter substance.

• Heat flows in both directions equally.

• Heat always flows from a hotter substance to a colder substance.

• Heat does not flow; it is static.

What is an example of conduction?

• An example of conduction is when a metal spoon gets hot from being in a pot of hot soup.

• An example of conduction is when ice melts in a warm room.

• An example of conduction is when a person feels the warmth of the sun on their skin.

• An example of conduction is when steam rises from a boiling kettle.

Define convection.

• Convection is the transfer of heat through the movement of fluids (liquids or gases) where hot fluid rises and cold fluid sinks.

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

• Convection is the transfer of heat through electromagnetic waves.

• Convection is the movement of air caused by the rotation of the Earth.

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 refers to the movement of particles in a vacuum.

• Radiation is the absorption of heat by solid objects.

What are the three main types of heat transfer?

• Conduction, convection, and radiation

• Conduction, evaporation, and condensation

• Convection, radiation, and insulation

• Conduction, convection, and compression

What is an example of radiation?

• Feeling warmth from the sun or a heat lamp.

• Hearing sound from a speaker.

• Seeing colors in a rainbow.

• Tasting food with different flavors.

What is the role of insulation in heat transfer?

• Insulation increases heat transfer by allowing heat to flow freely.

• Insulation reduces heat transfer by providing a barrier that slows down the movement of heat.

• Insulation has no effect on heat transfer.

• Insulation only works in cold environments.