Thermal Energy (AQA GCSE Physics Combined Science): Quizzes
📚Quizzes
Practise the questions
13 questions from this quiz
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Practise the questions
13 questions from this quiz
Which direction does thermal energy flow during heat transfer?
Which direction does thermal energy flow during heat transfer?
From higher to lower temperature
What are the three main methods of heat transfer?
What are the three main methods of heat transfer?
Conduction, convection, radiation
Through which state of matter does conduction transfer thermal energy?
Through which state of matter does conduction transfer thermal energy?
Solids
Why does conduction occur in solids?
Why does conduction occur in solids?
Particles are tightly packed together
What happens to particles in a solid when it is heated?
What happens to particles in a solid when it is heated?
They vibrate more vigorously
Why are metals excellent conductors of heat?
Why are metals excellent conductors of heat?
They have 'free' electrons carrying energy
Through which states of matter does convection transfer heat?
Through which states of matter does convection transfer heat?
Fluids (liquids and gases)
What happens to a fluid when it is heated?
What happens to a fluid when it is heated?
It becomes less dense and rises
What creates a convection current in a fluid?
What creates a convection current in a fluid?
Warm fluid rises, cool fluid sinks
What is unique about radiation compared to conduction and convection?
What is unique about radiation compared to conduction and convection?
It does not require a medium
How does an object's temperature affect the radiation it emits?
How does an object's temperature affect the radiation it emits?
Hotter objects emit more radiation
Why is air a poor conductor of heat?
Why is air a poor conductor of heat?
Its particles are far apart
How does double glazing reduce heat transfer?
How does double glazing reduce heat transfer?
It traps air between two panes of glass