Heat Transfer

What is conduction?

• Conduction is the transfer of heat through a material without any movement of the material itself.

• Conduction is the transfer of sound through a material

• Conduction is the transfer of light through a material

• Conduction is the transfer of electricity through a material

Give an example of conduction.

• Metal spoon in a hot cup of coffee

• Rubber band in a room temperature environment

• Plastic straw in a lukewarm drink

• Wooden stick in a cold glass of water

Explain how convection works.

• Convection is caused by the rotation of the Earth

• Convection works by transferring heat through the movement of fluids due to changes in density.

• Convection is a result of magnetic fields

• Convection relies on the emission of light particles

Describe a real-life scenario where convection occurs.

• Stirring a cup of coffee

• Walking on a hot sidewalk

• Boiling water in a pot

• Reading a book under a tree

What is radiation?

• Radiation is the process of converting matter into energy.

• Radiation is the emission of sound waves.

• Radiation is the transfer of heat through conduction.

• Radiation is the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.

Provide an example of radiation.

• Microwaves used in cooking

• Visible light from a lamp

• Sound waves in the ocean

• X-rays used in medical imaging

What are the conditions necessary for heat transfer to occur?

• Distance between objects and a medium for heat transfer

• Humidity difference and a medium for heat transfer

• Temperature difference and a medium for heat transfer

• Pressure difference and a medium for heat transfer

How is heat transferred through conduction?

• Through direct contact between particles in a material.

• Through sound waves

• Through convection

• Through radiation

How is heat transferred through convection?

• Heat is transferred through convection by static fluids

• Heat is transferred through convection by radiation

• Heat is transferred through convection by the movement of fluids.

• Heat is transferred through convection by conduction

How is heat transferred through radiation?

• Conduction

• Convection

• Reflection

• Electromagnetic waves