Understanding Heat Transfer

What is heat transfer?

• Heat transfer is the process of cooling substances down.

• Heat transfer refers to the increase of pressure in gases.

• Heat transfer is the conversion of thermal energy into electrical energy.

• Heat transfer is the movement of thermal energy between objects or substances.

Name the three types of heat transfer.

• Absorption, Reflection, Diffusion

• Conduction, Convection, Radiation

• Insulation, Conduction, Compression

• Evaporation, Condensation, Sublimation

What is conduction?

• Conduction is the movement of materials to transfer heat.

• Conduction is the process of cooling a material by removing heat.

• Conduction is the transfer of heat through radiation.

• Conduction is the transfer of heat or electricity through a material without the movement of the material.

How does convection work?

• Convection occurs only in solids.

• Convection requires a vacuum to function.

• Convection is the transfer of heat through direct contact.

• Convection works by the movement of warmer, less dense fluid rising and cooler, denser fluid sinking, creating a circulation pattern that transfers heat.

What is radiation in terms of heat?

• Radiation is the process of heat being absorbed by solid objects.

• Radiation is the transfer of heat through electromagnetic waves.

• Radiation is the movement of heat through liquids.

• Radiation is the transfer of heat through conduction.

Can heat travel through a vacuum?

• Yes, heat can travel through a vacuum.

• Heat requires air to travel.

• Heat can only travel through solids.

• No, heat cannot travel through a vacuum.

What is an example of conduction?

• A fan blowing air in a room.

• A glass of water boiling on the stove.

• A metal spoon getting hot in a pot of soup.

• A person warming their hands by a fire.

What happens to air when it is heated?

• Air remains unchanged regardless of temperature.

• Air contracts and increases in density when heated.

• Air expands and becomes less dense when heated.

• Air cools down and becomes denser when heated.

What is an example of convection?

• Freezing water in a freezer

• Heating a pot of water on a stove.

• Boiling an egg in water

• Stirring a mixture with a spoon

How does the sun heat the Earth?

• The sun heats the Earth through the emission of electromagnetic radiation that is absorbed by the Earth's surface.

• The sun heats the Earth by reflecting off the moon.

• The sun heats the Earth by creating wind patterns.

• The sun heats the Earth through volcanic eruptions.