Science outcome 4

Which of the following is NOT a method by which heat can be transferred?

• Conduction

• Convection

• Radiation

• Insulation

What is conduction in the context of heat transfer?

• Movement of heat through a vacuum

• Transfer of heat through direct contact

• Transfer of heat through electromagnetic waves

• Cooling of a material by exposure to air

Which material is mentioned as a very good thermal conductor?

• Aluminum

• Plastic

• Wood

• Copper

How does heat travel during conduction?

• From a cooler to a warmer area

• From a warmer to a cooler area

• In a circular motion

• Randomly without any specific direction

What is the example given in the image to explain conduction?

• Heating of water in a boiler

• Heating of a copper tube

• Cooling of a metal rod

• None of the above

Which of the following materials is considered a good conductor of heat?

• Wood

• Copper

• Polystyrene

• Still Air

What can bad conductors of heat be used as?

• Insulators

• Semiconductors

• Superconductors

• None of the above

According to the image, which statement is true about materials that are good thermal conductors?

• They are poor electrical conductors

• They are also good electrical conductors

• They are neither good nor bad electrical conductors

• They cannot conduct electricity

What is required for convection to occur according to the text in the image?

• A solid medium

• A vacuum

• A fluid or gas

• High pressure

What happens to the molecules in a fluid or gas during convection?

• They expand and contract

• They rise when heated and fall when cooled

• They vibrate at a fixed position

• They dissolve into smaller particles