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WorksheetsConduction - Oxford AQA IGCSE Physics
Total questions: 11
Worksheet time: 6mins
What is thermal conduction?
The process of energy transfer by vibrating particles in a substance. It is the main method of thermal energy transfer in solids.
The movement of heat through fluids by the motion of the fluid itself.
The transfer of heat through direct contact between materials.
The process of energy transfer through electromagnetic waves.
Why are metals good thermal conductors?
They have a low density which allows heat to pass through easily.
They have a high number of free electrons that gain energy and transfer it quickly through the metal.
They are solid at room temperature, which helps in heat conduction.
They have a crystalline structure that enhances thermal conductivity.
How do insulated mugs work?
They have a vacuum between two layers to reduce energy transfer by conduction, maintaining the drink's temperature longer.
They are made of metal that conducts heat quickly, keeping drinks warm.
They are filled with foam to trap heat inside.
They have a double wall filled with water to maintain temperature.
How do free electrons contribute to conduction in metals?
Free electrons gain energy and travel through the metal, speeding up thermal conduction by colliding with other electrons and metal ions.
Free electrons are trapped in the metal and do not contribute to conduction.
Free electrons only move at low temperatures, which slows down conduction.
Free electrons create a barrier that prevents conduction in metals.
In which direction does energy transfer occur during conduction?
From cold to hot
From hot to cold
In a circular motion
In random directions
What is thermal equilibrium?
Thermal equilibrium is achieved when energy is evenly distributed throughout the substance.
Thermal equilibrium occurs when a substance is at its boiling point.
Thermal equilibrium is the state when a substance is completely frozen.
Thermal equilibrium is when a substance is in a state of constant motion.
What is an insulator?
A substance that is a good thermal conductor.
A substance that is a poor thermal conductor, used to reduce energy transfers.
A material that enhances energy transfer.
A device that generates heat.
What happens when two objects of different temperatures come in contact?
Thermal energy is transferred from the cooler object to the hotter object.
Thermal energy is transferred from the hotter object to the cooler object.
No energy transfer occurs between the objects.
Both objects reach the same temperature instantly.
What occurs when a substance is heated in terms of particle movement?
The particles start to move around (vibrate) more, transferring energy from their kinetic store to the kinetic store of neighboring particles as they collide.
The particles become stationary and do not move at all.
The particles move slower and lose energy to their surroundings.
The particles expand and create a vacuum around them.
Give examples of good insulators.
wool
metal
glass
concrete
Why are liquids and gases poor conductors of heat?
In liquids, particles are close but slide past each other, while in gases, particles have more space between them, making them poor conductors.
Both liquids and gases have high thermal conductivity due to their molecular structure.
Liquids and gases are poor conductors because they do not contain any free electrons.
The temperature of liquids and gases is always low, which affects their conductivity.
