GCSE Physics - Conduction, Convection and Radiation #5

The video tutorial explains the three methods of heat transfer: conduction, convection, and radiation. Conduction occurs in solids where vibrating particles transfer energy to neighboring particles. Convection happens in fluids, where heated particles move from warmer to cooler regions, creating convection currents. Radiation allows heat transfer through a vacuum via infrared waves. The tutorial also discusses thermal conductivity and how different materials conduct heat differently.

Which of the following is NOT a method of heat transfer?

• Conduction

• Convection

• Radiation

• Evaporation

What is the primary reason metals are good conductors of heat?

• They have a high thermal conductivity

• They have a high density

• They are malleable

• They are shiny

In which state of matter does convection primarily occur?

• Both liquids and gases

• Gases

• Liquids

• Solids

What causes convection currents to form in a fluid?

• The fluid's density changes due to temperature variations

• The fluid's color

• The fluid's chemical composition

• The fluid's surface tension

How is heat transferred through a vacuum?

• Diffusion

• Radiation

• Convection

• Conduction

What type of waves carry energy during radiation?

• Microwaves

• Sound waves

• Infrared waves

• Ultraviolet waves

Why does a hot object emit more radiation than a cooler one?

• It is closer to the sun

• It is made of metal

• It has a higher temperature

• It has a larger surface area