Exploring Heat Transfer Concepts

What is conduction of heat?

• Conduction of heat is the movement of heat through fluids.

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

• Conduction of heat is the transfer of heat through radiation.

• Conduction of heat occurs only in gases.

How does heat transfer through conduction occur?

• Heat transfer through conduction occurs through radiation.

• Heat transfer through conduction occurs via molecular collisions and energy transfer.

• Heat is transferred through conduction by electromagnetic waves.

• Conduction involves the movement of fluids to transfer heat.

Which materials are good conductors of heat?

• Plastic

• Rubber

• Copper, aluminum, silver, gold.

• Wood

What is an example of conduction in everyday life?

• Touching a hot metal spoon.

• Sitting in a warm room

• Using a microwave to heat food

• Boiling water in a kettle

Define convection currents.

• Convection currents are the transfer of heat through direct contact between materials.

• Convection currents are the movement of fluid caused by temperature differences within the fluid.

• Convection currents are the stillness of fluid at constant temperature.

• Convection currents are the movement of solid objects due to gravity.

How do convection currents work in liquids?

• Convection currents are caused by the movement of solid particles in a fluid.

• Convection currents do not create any flow in liquids.

• Convection currents occur only in gases, not in liquids.

• Convection currents work by the movement of heated, less dense fluid rising and cooler, denser fluid sinking, creating a circular flow.

What role does temperature play in convection?

• Temperature has no effect on convection.

• Temperature drives convection by causing density differences in fluids.

• Convection occurs only in solids regardless of temperature.

• Higher temperatures always decrease convection rates.

Can convection occur in gases? Why or why not?

• Convection is a process exclusive to solids.

• Gases cannot transfer heat through convection.

• Convection only occurs in liquids.

• Yes, convection can occur in gases.

What is radiation of heat?

• The process of cooling down objects by removing heat.

• Radiation of heat is the transfer of thermal energy through electromagnetic waves.

• The movement of heat through liquids only.

• The transfer of heat through direct contact.

How does radiation differ from conduction and convection?

• Radiation requires a medium to transfer heat.

• Conduction and convection involve electromagnetic waves.

• Radiation differs from conduction and convection as it transfers heat through electromagnetic waves without needing a medium.

• Convection transfers heat through direct contact only.